new heatsink mod

[specific]

thanks to Diggr for sparking the idea!
no that's not two fans, you silly twit!
that's a delta housing used as a conduit under a thermaltake fan. i clipped out the delta fan.;)
waddya think?

[Robin Hood]

Do you have any before/after temps with that?

[looktall]

i've been wanting to do the same thing for my 120mm blowhole.

use a dead 120mm fan with the guts cut out of it as a fan duct.
all i have to do is find a dead 120mm fan. :p

[specific]

since you ask, sir robin, i shall post.
before i did this, my cpu was locked, running 1637@140fsb, with temps of 28-30C sys & 45-50C cpu. that's idle to load. that's also the same temps i was getting at stock speeds.
when i made my mod, i also took the liberty of unlocking my cpu, which now does 1667@133fsb 12.5x 1.775v. the temps i'm getting now are the same as i was getting then, maybe one degree higher sometimes.
i've taken the cpu up to 1729, both locked and unlocked. wasn't too stable though. idle temps were at my current load temps.
surely, the mod must help a couple degrees, with just a little less noise. it's only a 5000rpm fan. the delta was 7200. strangely enough though, when i switched from the delta to the thermaltake, there was NO difference in performance. apparently the heatsink must have a point of diminishing returns, somewhere below 5000rpm. unfortunately, i can't vary the fan speed to find that point, because i don't have a rheostat. and i'm getting a new sk-7 & rpm controlled enermax 80mm tomorrow, so i don't think i will bother.
i could drop back to stock speeds and check the specs. all in the name of thorough scientific research.
brb

[specific]

seems that 28/45 is as good as this heatsink gets, even at stock. and that depends on the room temp. (i need to get a thermometer for the room). usually 29/46 is the idle. the thermostat is set on 73F at my house. alabama climate, it's still hitting 85F these days.

[KLowD9x]

maybe you should have the fan blowing?

[specific]

uh, i'm sorry. but i don't kwite understand what you mean KLowD.
do you mean the hs fan? blowing, as in away from the cpu? if that's what you mean, it is. i had it on the other way, with the tt lable out, but that was blowing on the heatsink, and my temps were higher.
if i got you all wrong, pleas explain.

[specific]

looktall,
if i see one running around somewhere, i'll be sure to kill it for you.:D

[willlangford]

i am wondering with the same setup if it helps. try it with the same fsb and all as before and see what the temps are. i am REALLY wondering how it works.

~Will

[specific]

Originally posted by specific
seems that 28/45 is as good as this heatsink gets, even at stock. and that depends on the room temp. (i need to get a thermometer for the room). usually 29/46 is the idle. the thermostat is set on 73F at my house. alabama climate, it's still hitting 85F these days.
repeating myself here, but it's ok.
what i'm saying is this. at stock speeds (no overclock whatsoever) i got the same temperatures with the delta 7200rpm fan, and with the thermaltake 5000rpm fan. since the added cfm of the delta yields the same temps, i'm led to believe that the heatsink has been maxed out. it just won't get anybetter than 45C, UNLESS there is some SIGNIFICANTLY cooler air being channeled onto it. in other words, this is the point of diminishing returns on the heatsink. no amount of air short of a dust removing air can, will improve on these temps. i've lapped this heatsink well. i'm using arctic silver. it just won't go below 45C. maybe if the computer was in an igloo, we would see a change. but i can't type with gloves on. and the sound of my teeth chattering would be more annoying than the fans.
so i'm afraid that taking it back to a non-overclocked speed isn't going to answer the question of, "what kind of drop in temp does this mod bring?" i tried it. same temps.
it's wishful thinking if you think it would help more than a couple of degrees. it is also wishful thinking to assume it would approach noise levels of "stealth mode".
what is does do, is shave a couple of decibles, and a couple of degrees. (presumably? maybe)
however, i feel that this is true, because i can hear a slight difference. and i'm also overclocking more than i was before, at slightly higher voltage. so, if it wasn't working, as far as temps are concerned, then i should be posting idle temps of maybe 47 or 48 degrees.
sorry will, but i tried the old settings. results were inconclusive. but given my current overclock, and temps, it does seem to be helping out. a far cry from drastic. but a little, nonetheless.
and that's all i expected.
the same, or better results could probably be achieved with a 60mm to 80mm fan adapter. i would be willing to bet that would even be quieter than this solution.
if you disagree, then let me know. i'm open to any comments and/or criticisms.

[KLowD9x]

yea, I was just wondering if having it blow on the HSF would help, but I guess not :cool:

[WarriorII]

Specific,

Please see Joe C.'s article in the heat sink data base rating, for the PEP66.

"Specifically" (lol) go to page 2. He added an article and pics from me.
That same system, I added a 120mm intake, and have CPU temps now in the 35C range - loaded.
[That's on my Spitfire 600, running @ 866 on air]

Good Luck.

[specific]

the dixie cup box mod?
that's a neat idea, Warrior!!
thanx

[willlangford]

dixie cup box mod - what the hell is it?

~Will

[WarriorII]

What is it? lol. :)
Basically, you are ducting you HSF from the CPU.
Using Positive case pressure, then duct your CPU out the back, using the "Dixie" cup box, duct the HS from the side to the rear exhaust in your case.
You still have your std. fan on the HS, but you are also pulling from the side, by ducting it. leave a small opening on the non ducted side also.
This allows air velosity to increase over the CPU, accross the HS.

Now, be careful, some HS setups do not have the fins going in the correct direction to do this "Mod".

Go here (http://www.overclockers.com/articles527/index02.asp) to check it out.

It works really great now that I have installed 120mm intake on the case.
[temps are now in the mid 30C range- load]

:cool:

[Silversinksam]

I once did a similiar mod, I used a 92mm fan housing and glued the 80mm fan to the housing. Worked very well for me. :)

[specific]

WarriorII
i did it! check it out.
thanks again for the tip.

[safemode]

sure, you can stack your fans. You'll just have a jet engine in your computer with fans that run half as long or so before breaking down. That's what happens when your fan spins at a speed it wasn't designed for. You're probably 1000-2000 or so rpms higher than you're designed for.
Hope you like buying fans.

The only reason i'd see in stacking fans is well, no reason because i cant justify buying new ones every couple months.

Also, loving it how everyone is keen on quoting cpu temps without giving any ambient or intake air temps. It really makes the cpu temps mean something.. . Really it does. < /sarcasm >

[specific]

Originally posted by safemode
sure, you can stack your fans. You'll just have a jet engine in your computer with fans that run half as long or so before breaking down. That's what happens when your fan spins at a speed it wasn't designed for. You're probably 1000-2000 or so rpms higher than you're designed for.
Hope you like buying fans.

The only reason i'd see in stacking fans is well, no reason because i cant justify buying new ones every couple months.

Also, loving it how everyone is keen on quoting cpu temps without giving any ambient or intake air temps. It really makes the cpu temps mean something.. . Really it does. < /sarcasm >

3 points i'd like to make

FIRST
read the posts
that's not stacking fans

SECOND
ambient temps have been posted enough times in this thread, so it's just like repeating yourself

THIRD
see first point

[Iron Hawk]

safemode, please read the thread before posting. BTW, stacking fans increses their pressure.

[safemode]

Originally posted by specific
3 points i'd like to make

FIRST
read the posts
that's not stacking fans


Wasn't talking about your second picture. Was talking about the first.


SECOND
ambient temps have been posted enough times in this thread, so it's just like repeating yourself


I'm referring to warrior's temp. Your ambient temp range was posted. But that tells me nothing about his unless he lives in the same house.

[specific]

Originally posted by safemode


Wasn't talking about your second picture. Was talking about the first.



I'm referring to warrior's temp. Your ambient temp range was posted. But that tells me nothing about his unless he lives in the same house.

sorry for the misunderstanding about warriorII's temp.

but i was talking about the first picture as well.
those aren't stacked fans. one of the fans was cut out.

[Deathknight]

Jesus safemode do you just troll these boards to rip into people? Read the post its not stacking fans!

[willlangford]

i get what you all are saying.

~Will

[WarriorII]

Specific,

Sweet d00d! :)
How are your temps now?
I prefer this method with a "Positive case pressure"
That way the air is forced to go accross the HSF, by design.

[That's it! put a "Big Ole Band-Aid" on it...lol]

EDITED:
Be careful here. Are your PS fan & HSF fighting for the same air? You might look at seperating them some how.
Another duct maybe?
Is your PS fan adjustable? maybe turn it down in speed some.
So it doesn't rob the HSF's air.

And guys, the fourms are here to help people,
not :argue:

[specific]

finally got sub 40C!!!!! yeah!
with the side off!!!! boooo!!! 41 with the side on.
i have a 5.25 bay fan, and side case fan for extra intake. top fan for exhaust. so that's 3 in, 3 out (including ps fan).
still, i don't quite have positive air pressure.
i'm using speed fan, TRYing to lower the top exhaust, but not having any luck.
do you know of any other way to change my fan speeds, through the mobo's sensors?
i don't want to use a bunch of hot rheostats.

[specific]

ok ok i know this bumps but this should be the grand finale of this thread.
finally, sub 40, case closed!! (pun intended)
this is due to positive case pressure, at last.
if you notice in the last pic i posted, there is unused fan real estate. since my front case fan was practically useless for intake due to lack of proper ventilation to outside air (why do case mfrs. still do this) i decided to make better use of it.
what i did with it should be obvious by now. i placed it in the "unused real estate" and got much better results. now this fan is actually bringing in some air as opposed to just mixing the case air around, and positive air pressure has been achieved.

thank you all for your help and suggestions!!!!!
:) :D :cool: :beer:

[WarriorII]

Glad to be of service.

:cool:

[Gnufsh]

What heatsink do you have? It the first pic, the fan, as has been pointed out, appears to be sucking air up off the heatsink. Did you change that when you did the "dixie cup box" mod? Except for some Alpha's, HSF's usually work better with the fans blowing down on them instead of sucking up away. Or are some of us mis reading the picture?

[Gnufsh]

Oh, I just noticed an empty fan spot in the back of your case. Stick a fan on there. Come on, you know you want to...

[specific]

Gnufish?
read my last post. it will explain what i did with the extra fan "real estate" as i called it.
the first hs, with the fan mod, yeah it was pulling air off the hs. i had it the other way at first, but the temps were higher than they were before the mod! so i flipped it, and it worked better.
it's the other way around with my new sk7.
btw, the old hs was a microfin, white box, prolly dynatron, can't remember.

[Gnufsh]

Sorry, I must have missed that in the last post. WHy not stick an other fan up front and cut away some of what obstructs the airflow?

[specific]

i plan on putting a 120 up front, under the floppy. but the 80 that was there is doing a better job in its new home. that front fan doesn't seem to do anything but mix the air that's already inside the case, but it could help cool my hard drive though.
just got some as3 too. now my idle is 37. sweeeeeet!:)
next up? windows, and i ain't talking microsoft.