Thermal Compund Shootout

[Penguin4x4]

And the winner is......................................LINK (http://www.insideproject.com/showreview.cfm?reviewid=81)

[Deus]

wow, ive never heard of most of those...that shin-etsu stuff looks good, i might have to get some :) i dont keep up with exchange rates, but £7.5 seems kinda high though. not to mention £15 shipping on a 2 oz package lol, maybe there is some other place to get it

[CrystalMethod]

Awesome find on the review.

[ziah]

ya! i like. how about the process for the Cool Diamond grease!!! the hell with all that.

~z

[james.miller]

gonna have to get me that coolermaster compound.

oh BTW, Ziah, is your sig supposed to be like that? lol

[Since87]

Newegg has both the Coolermaster with SE, and the Shin Etsu compounds. I got some a while back. Don't remember the price.
Haven't used either yet.

[Penguin4x4]

Originally posted by Deus
wow, ive never heard of most of those...that shin-etsu stuff looks good, i might have to get some :) i dont keep up with exchange rates, but £7.5 seems kinda high though. not to mention £15 shipping on a 2 oz package lol, maybe there is some other place to get it

SSS found some:


http://www.ajigo-store.com/therin.html

[cozmo_d]

great I know what im buying next paycheck

thx for the great find

[Penguin4x4]

Some results:

http://www.xtremesystems.org/forums/showthread.php?s=&threadid=3190


:)

[Tismedt]

Great find on the review. I had never seen that site before but I will be looking at it regularly. thanks for the link. I always thought AS3 was the best. Guess I'll try some of the g-751 goop or maybe even the coolermaster goop.
Heres a couple questions, Does the compound break down after prolonged use ie; 2/3/4 months? Should it be reapplied on a regular basis?

[Penguin4x4]

Should be the same as AS.

[skou]

The company that makes (imports?) the shin etsu grease is close by, I'll call them- see if they will sell to me.

steve

[ziah]

lol james.miller. i was goofing off trying to insert html under vb but as you saw......

its all better now.

~z

[Colin]

Unfortunately the Inside Project review was done with: "Hardware monitoring by using a flat thermal probe placed next to the CPU die underneath the shim and HSF Any movement of the probe when changing compounds or any contamination by the compounds invalidates the results. Not to mention the severe secondary heat path. It’s sad that so many hardware Sites have such terrible test methodology.

[Freeloader]

I've been testing the shin etsu g-751 for the last couple of weeks and the results haven't been too good. I heated the compound first so I could apply it as thin as possible. The results after running prime95 for 72 hours was 1C better than the generic grease that I was using (sil mor). This was with a maze 3 and xp@1833mhz with 1.95 volts. I reapplied the stuff many times with no improvement. I also tried it with 2 other computers with the same results. water temps were accurate to +/- .5C and cpu reads in 1C increments. I ordered 3 tubes of the stuff from Ajigo with all 3 tubes showing the same results. The website that did the test showed the shin etsu to be 7C better than the sil mor with a 60 watt load. Since my cpu has a 50% higher load, the results should have been 50% better at around 10C. While my testing equipment is not state of the art, there is no way in a million years that I could be out by 9C. Either the stuff Ajigo sent to me is not g-751, or the stuff is bogus.

[Since87]

Freeloader there are other possible explanations for your results with Shin Etsu.

The review linked said that "Shin Etsu is expected to take 3 days to cure at medium/high heat, and that's when it is supposed to shine."

I have not been able to find any information verifying or elaborating on that statement. However if it is true, it brings up a couple possibilities.

You said that you heated the Shin Etsu up for easier spreading. Maybe heating the material up caused premature "curing" and limited the effectiveness of the compound.

In the review,the testing was done using an aircooled heatsink instead of a water block. Maybe the waterblock stays too cool to allow the material to "cure". The material in contact with the heatsink/waterblock may need to get hot in an installed situation in order to work correctly.

I don't have any facts to back any of this up, but I think these are issues that may need to be considered.

[Freeloader]

As I have said, I ran prime95 for 72 hours (3 days). I also tested it with 2 other computers and heatsinks, alpha pal 6035, and a stock pentium 3 heatsink. I also tested it without warming it up first, but the results were all the same. In one test, I ran the hsf at 7 volts to increase the temp and improve curing, but the results were the same. As I have mentioned, I bought 3 tubes so I tried everything under the sun to make my investment pay off.

[skou]

I have talked with the local company, they will sell me a sample but I have to pick it up. their minimum order is $100, but I can get 1 tube. If it works as stated, maybe a bulk buy?

I will talk to SSS about this.

[Since87]

Originally posted by Freeloader
As I have said, I ran prime95 for 72 hours (3 days). I also tested it with 2 other computers and heatsinks, alpha pal 6035, and a stock pentium 3 heatsink. I also tested it without warming it up first, but the results were all the same. In one test, I ran the hsf at 7 volts to increase the temp and improve curing, but the results were the same. As I have mentioned, I bought 3 tubes so I tried everything under the sun to make my investment pay off.

Disappointing to hear this. I'll probably try mine out, in hopes you got scammed, but I'm a lot less optimistic now.

[Freeloader]

If you haven't ordered yet, you may want to try chillblast.com instead of ajigo. The tubes contain 50% more stuff. This may be because its a different formula. There is a g-749 formula that ajigo may be pawning off as g-751. The tubes aren't labeled with the formula number, so it would be easy for them to get away with it. The g-749 formula has been reported to be identical to my results, as tested by other users.

[larva]

The description of the 751 compound sounds just like the syringes that used to accompany retail intel P-MMX chips. I used to have stacks of these syringes filled with a thick grey compound and used them for years until they dried out to the point that I couldn't get them to spread evenly. Although I thought highly of the stuff I never saw the disparity between it and white thermal grease or AS3 demonstrated in that test. Unfortunately I don't even have an empty syringe to check the numbers on at this juncture. Intel switched to white compounds applied the the HSF in the early celeron days and I haven't seen the grey filled syringes since.

[1Time]

I just ordered one g-751 for my AX-7. Hope it works.

[deeppow]

The web page (http://www.ajigo-store.com/shinetg7ther.html) for Ajigo claims to be G751. Of course, it could be false advertising but I decided to give 'em a whirl. :D

[Illah]

All you guys keep posting, I'm tempted since it's only $10 after shipping but I have a near brand new tube of AS3 right here, I don't wanna waste the tried and true. Let me know how it does for you all.

--Illah

[technogeeky]

He said he applied that stuff when it was "cool" - perhaps he refridgerated it for a while first.

[big_bertha]

this is not the first time i have heard of this stuff. i do believe this is what intel used to use on its old pentium chips as indicated above. http://www.chillblast.com/ has it and is where i ordered some. i havn't tried it yet since my AS3 combo is working good, but maybe when i have too much time to kill i will put some of this stuff on my cpu and go for it.

[Lithan]

Skou. Im interested in the bulk buy. You should make a thread for it... First find out how many tubes ya get for 100$ then total all fees, divide by number of tubes, and have folks sign up and paypal ya the moneys plus shipping to them (Please tell me you live in continental US.) Once you've got enough interested, make the order. If we are short folks. I might be able to take a few extras off your hands. Hell, if you get a good amount for that price I might take alot of them off your hands if your up to it. :)

[Illah]

Anyone get their's yet? How's it going? The price isn't much of an issue for me, it's cheap. I just don't wanna tear up my system if it's not any better than AS3.

--Illah

[skou]

I talked to SSSam, he said the only place I can sell stuff is in Classifieds, I will probably get some to test, then think about selling it there.

steve

[deeppow]

Got a tube of shin etsu g-751 and am trying it.

With repeated uses of AS3 I've found the best result I can get is my cpu running 9C above ambient. See sig below for setup.

Just applied shin etsu last night and am currently running Prime95. CPU is running 9C above ambient, yes same as AS3 initially. The link above that started this shows a big jump after some burnin time, I'll see.

It is much more like wood filler if you've ever used that, a thick putty. Does not spread as smoothly as AS3 but I used pretty much the same technique. I can now see why Freeloader tried all the variations in applying it.

I'll post after 3 days just to let ya know what happens. My bet would be, little change. :beer:

[Tecumseh]

The ONLY thing valuable about this article is the list of compounds
that may not have been know before.

The rest is completely worthless. Ultimately web sites like this
fall on their own sword.

[Illah]

Hey deeppow, did you order from that Ajigo place?

--Illah

[wildfrogman]

to bad they didnt use an internal diode for temp monitoring......... Personally i think for best long term a good thermal pad would be best as it would be sticky and mold the the cpu and heatsink. Also making sure if the computer gets bumped the heatsink~cpu junction doesnt get messed up. Ohwell, only time will tell, for quick testing or a few months then reaply paste the thermal paste is fine i think. Just i dropped 3 full C reapplying arctic alumina paste after it was on for around 4 months 24/7 run time, rebooted once every 3~4 days....win98se with a UPS and works pretty good for win98se stablity wise.

[deeppow]

Hey deeppow, did you order from that Ajigo place?

Yes. They seemed to work fine. Hadn't delt with them before.

Been running Prime95 most of day and cpu temp still 9C above ambient. :(

[Illah]

I hope it ends up dropping. That site mentioned surprising drops between days 2 & 3. There was also a link to some other forum where the members were praising the stuff. Even if the site has skewed results that shows something...

But yeah, keep us posted.

--Illah

[Freeloader]

deeppow, how full was the tube you recieved? the tubes I recieved had .4cc in each, while the tubes from chillblast had .6cc. Since the sizes are different, I'm thinking the formula may be different as well.

[deeppow]

deeppow, how full was the tube you recieved? the tubes I recieved had .4cc in each, while the tubes from chillblast had .6cc. Since the sizes are different, I'm thinking the formula may be different as well.

About 4.5 so I would assume the same as .4 you got. It says "Shin-EtsuMicroSi www.microsi.com" on the side. Going down into their site and you find link (http://www.microsi.com/prod-thermalmgt.html#grease) which notes G-749 (not G-751) and its properties. (You've previously noted this fact.) Shows a "representative" thermal conductivity of 2.9 (W/m °K), about the same as gold. I sent an email to MicroSi asking the difference between 749 and 751. I'll see if I get an answer.

There is also a review of G-751 at meetthegeeks (http://www.meetthegeeks.org/ourreview/2002/shinetsu/). Similar results as the initial post. Wonder if 751 is a new composition that is not yet released?

[big_bertha]

i sent an e-mail as well to them to see what is going on

do you guys know that the g-751 needs to be refrigerated in order to work properly. if its shipped without ice packs it doesnt work... which would explain why some people didnt get the expected results. you even have to store it in the fridge. on that geeks web page i found this which is the review of a NEWER shin etsu thermal paste

http://www.meetthegeeks.org/ourreview/2002/shinetsu7798d/

what do you guys think of that?

[Illah]

OK, the newer stuff looks real good! Time to get together for a group buy! I'm in if we do it.

--Illah

[Freeloader]

It may be that this stuff is highly suceptable to seperation. My stuff was in shipping for ten days with no "medipacks". Who knows if ajigo kept it refrigerated at all.

From what I read on other forums, chillblast doesn't actually carry the "new" stuff, only the original g-751 formula. It's hard to say when this new, non refrigerated version will become available. Hopefully, those e-mails will give us some info.

[big_bertha]

i e-mailed chillblast and asked if they store/ship it cooled. hopefully i get a good response but unless we get this stuff shipped properly it will cure on the shelf instead of on the cpu, which is probably why it isnt working for those who ordered it already. it isnt exactly obvious that you have to cool this stuff, so lets hope some e-mails give us some info

[Illah]

Despite the refigeration-element people do seem to be getting some good results. The link near the begining of the thread to xtremesystems or something has people raving about it, plus the two reviews at geek and the other one. I can't wait to see how deppow does.

I'm a big thermal paste fan. Sounds stupid, but the $$$/temp ratio of a good paste is far far far beyond anything else. I don't understand how people will shell out tall money on a big heatsink then be too cheap to get a good paste...

--Illah

[gone_fishin]

Here's the properties sheet.

click (http://www.silicone.jp/e/solution/heatdissipation/fluid/fluid.html)

[phantom punisher]

ill be watching this one from afar. i really dont think its better stuff. mostly becase i didnt see a list of the ingrediants of this new stuff. i mean therees not much out there that conducts better than silver and the AS boys have been using that for years now, im sure they perfected it.

[Since87]

Originally posted by phantom punisher
ill be watching this one from afar. i really dont think its better stuff. mostly becase i didnt see a list of the ingrediants of this new stuff. i mean therees not much out there that conducts better than silver and the AS boys have been using that for years now, im sure they perfected it.

Yes, but silver particles limit how thin the thermal compound joint can become. Perhaps the Shin Etsu stuff squeezes out better with heat and pressure. That's the only way I could see it being a substantially better thermal compound.

I too would like to see more info from the manufacturer. Maybe someone needs to let their marketing department know that if their stuff is really better, they need to get the word out and explain why.

[big_bertha]

i mean therees not much out there that conducts better than silver and the AS boys have been using that for years now, im sure they perfected it.

thats not entirely true. im not saying they use diamonds in their thermal compound, but there are ways having controlled heat transfer (ie... out of the cpu, but not in)

who cares how they do it so long as people get better temps. not the review guys since they can be bs'ing but the people in this forum who tried it. lets see what their temps are and then we can decide how good this stuff is for ourselves

[phantom punisher]

Originally posted by big_bertha


thats not entirely true. im not saying they use diamonds in their thermal compound, but there are ways having controlled heat transfer (ie... out of the cpu, but not in)

who cares how they do it so long as people get better temps. not the review guys since they can be bs'ing but the people in this forum who tried it. lets see what their temps are and then we can decide how good this stuff is for ourselves

its entirely true that theres not much better than silver at conducting heat. and for controled heat transfers? heat flows from high to low. im not sure what your saying is clear in english. and of course ill belive the people of this forum witch is why i said ill be watching. but i think i can guess at the out come of a oem product thats been around for a long time without being put in the spotlight. but hey, i hope im wrong, that would be great to drop a degree

[gone_fishin]

There may be other properties which were more appealing to oem's than the thermal conductivity. Longevity would be high on their list.

[JFettig]

wildfrogman, you got that link for those thermal pads you say are good? i got a sample comming to me, im gonna compare it to as3 on my cpu, and when i make my die sim, im gonna try it on there too

[wildfrogman]

http://www.bergquistcompany.com/ and click on thermal materials and then in the upper right hand corner click order samples.

[deeppow]

In case you've not seen this thread (http://forum.oc-forums.com/vb/showthread.php?s=&threadid=135457), have a look. It has some good/interesting links. In particular is a review (http://www.htgk.org/jeuda/articles/coolem/thermalpaste/index.htm) that used P3 (on-die temp measurement?). AS3 wins.

I would say this tends to raise the issue of experimenter techniques and if they can control them. Else somebody ain't on the up & up. :mad:

[Freeloader]

.In particular is a review that used P3 (on-die temp measurement?). AS3 wins.

That review is problably the worst paste comparison on the planet. A 5C difference between as2 and as3 with less than a 30 watt load is impossible. That would equate to a 15C difference at 100 watts. The real difference should be 1c or less with a 30 watt load

deepow, how are your temps doing. Have you seen any improvement yet?

[wildfrogman]

seems like paste application could have been better maybe? The guy didnt cycle the shin estsu stuff, it is fairly thick if i remeber right and performs better after it gets warm almost like a thermal pad. Then allowed to cool down and it thins out and then performs like it normally does.

[deeppow]

The company did respond to my question, The G-751 is a better performing thermal grease in comparison to G-749. FYI - the G-749 thermal grease has been discontinued. The replacement thermal grease (same formulation) is G-765. The difference between the G-749 and G-765 is the company that supplies us with the filler.

Best regards,
David Dalesandro
Shin-Etsu MicroSi
10028 S. 51st St.
Phoenix, AZ 85044


My temps remain the same as when I use AS3. Don't see much if any difference.

wildfrogman, sounds like it needs to be cycled? Any suggestions? Now that I got this stuff I might as well try to set it up as best I can. Right now my conclusion would be to use AS3, much easier to apply and get same results. :D

[David Dalesandro]

edited by cw823

[BillA]

This post deleted by its "derogatory and insulting" author so that it will not be (so) necessary
"to defend the little guys against the tyranny of the know-it-alls."

[David Dalesandro]

edited by cw823


4. We do not permit advertising OF ANY KIND! This includes posting your URL, offering items for sale or trade Or announcements of new sites This applies equally to commercial and private ads. We do permit Senior Members to post their URLs - this is the only exception.

[Lithan]

I wouldn't consider that advertising, to be fair. We asked questions regarding a product and an employee of the manufacturer was generous enough with his time to answer them in the forum. Of course to ensure this is not a problem, you could simply email one of the members who has contacted you, and they can quote your email here. It's semantics true, but I'd bet that none here would have issue with it.

[big_bertha]

The G-751 and G-749 are different thermal materials. Please see attached pdf files.

Shin-Etsu has discontinued the G-749 product. The replacement (same formulation as G-749) grease is G-765.


i got a response too. seems similar so now we know. i am still curious about that other stuff so i e-mailed dave back. heh. he is reading it here and in his e-mail.

hopefully someone will do a "scientific" test as BillA suggested. dont have any so i cant but first people need a test rig NOT in a case. that gets rid of other heat interfearence

[Lithan]

I for one am still curious about this stuff... http://www.meetthegeeks.org/ourreview/2002/shinetsu7798d/
The X23-7798D. If the g-751 doesnt need refrigeration, is that just an upgrade, as AS3 was to AS2, of is it a different line of their products entirely?

[big_bertha]

lithan. if i get a response via e-mail i will post it here

[David Dalesandro]

cw823,

I apologize for any posts that have violated the conditions of this website.

David Dalesandro

[Since87]

Originally posted by Shin-Etsu
edited by cw823


4. We do not permit advertising OF ANY KIND! This includes posting your URL, offering items for sale or trade Or announcements of new sites This applies equally to commercial and private ads. We do permit Senior Members to post their URLs - this is the only exception.

Hmm.

If I do a search for member name "Nevin", I find a lot of posts from a person purporting to represent Arctic Silver. Where exactly is this line drawn?

[big_bertha]

wow that was quick. guess we are all online now :)


The X-23-7798D does perform better than G-751 (especially above 2 mils). Please see the attached ...

The Thermal resistance is in terms of (mm^2 * K / W)

[Lithan]

*drums his fingers. (Mr Burns style)*

Excellent.

Im assuming that can be purchased just as the g-751 in quantitys of 50, 1 gram syringes?

[big_bertha]

well notice what the chart says. if you have a layer thicker than 1mm the new X-23-7798D formula is better (according to their tests) but if you are thinner, then the g-751 is still better.

how thick do you think the layer is between the cpu and HS. if its 1mm both are pretty equal so which ever you can find would be the suggestion. the refrigeration issue is also another concern. i asked about that already so im waiting for the e-mail

stay tuned

[deeppow]

There was some bad info floating around (such as refrigeration) that was corrected by that post. A much more selective revision could have been done and debatable if that was needed. :o

[Lithan]

Nicely said Deeppow. And thanks for pointing that out to me Bertha. I'm very stupid and had failed to notice that point. (No, I'm not being sarcastic.)

[big_bertha]

There was some bad info floating around (such as refrigeration) that was corrected by that post.


which post. mine?

i didnt find any info out on that yet and if it was in the deleted post i never saw it. ****

i too am a dumb ass. just one who can read charts :)

[UnseenMenace]

Originally posted by Since87


Originally posted by Shin-Etsu
edited by cw823

4. We do not permit advertising OF ANY KIND! This includes posting your URL, offering items for sale or trade Or announcements of new sites This applies equally to commercial and private ads. We do permit Senior Members to post their URLs - this is the only exception.

Hmm.

If I do a search for member name "Nevin", I find a lot of posts from a person purporting to represent Arctic Silver. Where exactly is this line drawn?

I was of the opinion that the Line is actually drawn on Advertising.. at no time that I am aware of has Nevin actually advertised A-Silver and if you read some of the posts which can be searched for he generally attempts to help answer questions regarding A-Silver in the same manner as any forum user would with as much knowledge as him on the product. The only other situations that I am aware of regarding A-Silver which Nevin has been involved with is when a forum user is mis-informed and buys a product which he believes to be A-Silver when in reality it is not. In situations such as these Nevin has been known to replace the bad purchace with the real thing. ??

The forum rules are clearly stated and must be followed by all, If there is a product of interest to the forum community and you are possibly involved with it.. My advice would be simple.. Send a sample to Joe for a review on the front page.

[big_bertha]

how bout that dave (read above)

a review using the die simulator. maybe that will put some concerns to rest

[LutaWicasa]

Originally posted by Since87


Hmm.

If I do a search for member name "Nevin", I find a lot of posts from a person purporting to represent Arctic Silver. Where exactly is this line drawn?

Yes, and this company rep is more than welcome to post and participate as well. You will notice that Nevin doesn't include urls for their website either. He has posted informational urls, such as to test results etc. And has never specifically promoted sales at the forums.

[Since87]

Originally posted by big_bertha
well notice what the chart says. if you have a layer thicker than 1mm the new X-23-7798D formula is better (according to their tests) but if you are thinner, then the g-751 is still better.


That chart is labeled in mils not millimeters. A mil is 1/1000 of an inch.

My digital calipers tell me there are 39.5 mils to a mm.

My calipers also measure a piece of notebook paper at 3.5 mils.

You are talking thicknesses that very few people can/will control well.

[big_bertha]

my bad. ok... so the new stuff is better

as well here is the info on the refrigeration, that was deleted.


The G-751 should not be refrigerated. As I stated in the forum (which got erased), when stored in refrigeration, and used in ambient temperatures, condensation forms on the grease. Since the base material of the grease is silicone oil, water is detrimental to the performance of the grease.

[deeppow]

big_bertha, which post. mine? No, think I saw it in one of the meetthegeeks posting related to a review somewhere.

Thanks for adding the info back about refrigeration. :cool:

Got a message from David regarding how to tell the difference between 751 and the older 749. To tell the difference between the G-749 / G-765 and G-751 products, take a look at the caps. The G-751 has blue caps, the G-749/G-765 have red caps. Unfortunately we do not label each syringe with the part number. I got the blue caps. :D

[David Dalesandro]

To all:

Last Wednesday, I sent a sample of G-751 to Joe as per the above post.

[Lithan]

Well... If enough are interested I should have the cash to make a bulk purchase of this. I can't make this thread in classifieds. I can't even see if someone else has. But a few more days and I should have the required posts. And if noone else has got plans for this going than I'll put them in motion.

[UnseenMenace]

Be interested in Joe's opinions, guess that will be a discussion ;)

[big_bertha]

lithan.... im in for a few.

get that new goop if you do... not 751 .... we need a nick name for it. why do companys insist on fuxored product names. anyways...

[Illah]

Hey, I'm in for a tube (maybe more!) of either of those pastes once Joe finishes his bidniss :) The newer one seems better on paper, if it can be proven better then I'll want that. Keep me posted as the group buy evolves.

--Illah

[Since87]

What's this? Could it be?

The Holy Grail of Cooling

Found in the Digi-key catalog. (Digikey part number P11440-ND)
Listed with the low low price of $29.88 for a 60mm X 90mm sheet.
None in stock.

P11440-ND“PGS”
(Pyrolytic Graphite
Sheet) Heat Sink Sheet
Features:
• Excellent thermal conductivity: 600 to 800 W/(m.K),
twice as high as copper, three times as high as
aluminum
• Light weight: the same as water (Specific gravity: 1.0
g/cm3), 1/9 that of copper, 1/3 that of aluminum
• Flexible sheet, easy to be cut or trimmed and
withstands repeated bending
• High heat resistance: Stable up to about 400°C even
in the air
• Low thermal resistance
• The main component is carbon. Minimal impurities
and outgassing
• Excellent heat transferring performance. Heat sink and
even distribution of heat
Application Examples:
• Notebook personal computers, DVDs, DVCs, mobile
phones
• Semiconductor manufacturing equipment (Sputtering,
Dry etching, Steppers)
• Optical
Items Characteristics
Thickness 0.1±0.05mm
Density 1.0 g/cm3
Thermal Conductivity (a-b plane) 600 – 800 W/(m.K)
Thermal Resistance 0.4°C/w(10N/cm2)
Electrical Conductivity (a-b plane) 10000 S/cm
Extensional Strength 19.6 Mpa
Expansion Coefficient (a-b plane) 9.3 x 10-7 1/K
(c axis) 32 x 10-6 1/K
Heat Resistance 400°C
Bending (angle 180, R5) 10000 cycles
Dimensions – mm Digi-Key Price Panasonic
L x W Part No. Each Part No.
125 x 180 P11438-ND 94.62 EYG-S131810
125 x 90 P11439-ND 51.46 EYG-S091310
60 x 90 P11440-ND 29.88 EYG-S060910
General Characteristics of PGS
PGS (Pyrolytic Graphite Sheet) is a heat sink sheet with high
thermal conductivity and high flexibility.
PGS is made of graphite with a structure that is close to a single
crystal.
This is achieved by highly-oriented polymer film sheet, a process
which has never been implemented before.

[Since87]

Darn, I requested the datasheet from DigiKey.

If I'm interpreting it correctly, the material is only highly conductive down it's length, and not through its thickness. I'm not sure how it would be useful. I've uploaded the datasheet.

[wildfrogman]

Concerning the pyrolytic graphite heat spreaders,

I have been reading into these things for quite a bit. It allows the heat to be spread out evenly sideways first~faster etc but still transfers the heat like its supposed to into the heatsink~waterblock that is attached to it. One thing though 0.1mm~0.05mm thickness i dont think is enough since most everybody uses copper base thicker than 1/13th inch which would be equivalent to 1/26th inch of copper in heat spreading performance. For a small superhigh flow thin base waterblock with copper fins or such should work better but overall i would think thicker than 0.1mm would be optimal for best performance on a highly overclocked cpu. Nice info though as it is one of the first i have seen for sale.

[deeppow]

Results after 3 days testing.

At fsb=198, Vcore=1.85, cpu mult=9.5 I get the following:
.........delta-T AS3....................delta-T G751
................9C................................ ....9C
where the delta-T is Tcpu-Tenvironment as measured by MBM5 and a mobo diode.

I have no statistics related to G751, i.e. this is for a single application.

I have 23 mounts with AS3 at the above settings with an average delta-T of 9.2C and a standard deviaton of 0.21. These are using MBM5 readings which show only integer temperature readings so the average and standard deviation relect the number of samples more strongly. Also the results don't show a Gaussian characteristic which averages and standard deviations imply, however this is most like due to the use of MBM5 integer temperature readings.

I ran a quick study related to Vcore variation using this mount of G751 since the delta-T is dependent on that and cpu frequency. Obtained the following results: table (http://home.earthlink.net/~deeppow/G751_results.htm). I had to vary the cpu mulitplier because things weren't stable at the lower Vcore.

My conclusion is that these are very hard numbers to get with any accuracy and sure hope Joe has the equipment and time. :cool:

[1Time]

I've been using this Shin-Etsu product for about a week now and I've only seen a 1C drop in my load and idle temps. Can't compare it to my previous AS3 temps though since I also modded my case and changed fans. However, I can say I'll be switching back to AS3 as soon as I get the chance since I suspect it will do better than this stuff.