Need Ram That Will Do 281fsb 1:1... which?

[Vio1]

Hi, I want my setup to run 1:1 and my fsb is at 281mhz... I want 1 gig (2 sticks for dual channel).... what ram can do it? What do you recommend?

[Needitcooler]

http://www.newegg.com/app/ViewProductDesc.asp?description=20-231-006&depa=1

Right there. Those can hit 281 easy.

[flapperhead]

another u might want to consider is the tried and true komusa adata pc4200 hyperram.as far as i know they still employ the hynix bt/ct d43/d5 chips. it generally runs around 280-290., and alot of the guys who purchased it last year were very happy with it. now it wont go 300 ,but for 210.oo buxs it may be just what u need.make sure u use the pulldown box and select adata brand..http://www.komusa.com/1gbkit5pc53d1.html

[Albuquerque]

My el-cheapo Adata PC4200 is the best stuff I've ever had. Two 512mb sticks in dual channel running 292 (584DDR) at 1:1 in my Albatron PX865PE Pro II with the bios set to 2.85v. They didn't need much voltage to hit these speeds either, but they did hit a brick wall right below 300. I've seen a couple of individual sticks get to around 300-303 if I remember correctly, but I've never seen a pair do more than about 295.

[glock19owner]

http://www.newegg.com/app/ViewProductDesc.asp?description=20-231-006&depa=1

Right there. Those can hit 281 easy.


The LC's are like 30.00 cheaper for the 1G set if price is a issue...I am using the LC's...running at default voltage (2.65v)...see sig...

[Vio1]

Ok, need your assistance again. Got a pair of OCZ PC4400 Performance ram.... the problem is that it wont do 281fsb..... memtest freezes up after 5 mins. I had it running 1:1 (281mhz) with 3.2-3.3v

I know it is the ram, because i changed the ram ratio to 5:4 ( 2.9v @ 224mhz) and ran memtest86 through 6 passes without error)

Any ideas?

If anyone has some 1gb of ram that can do 281fsb 1:1 let me know...(trade or $)

[Helsyeah]

Ok, need your assistance again. Got a pair of OCZ PC4400 Performance ram.... the problem is that it wont do 281fsb..... memtest freezes up after 5 mins. I had it running 1:1 (281mhz) with 3.2-3.3v

I know it is the ram, because i changed the ram ratio to 5:4 ( 2.9v @ 224mhz) and ran memtest86 through 6 passes without error)

Any ideas?

If anyone has some 1gb of ram that can do 281fsb 1:1 let me know...(trade or $)

Actually, if memtest is freezing, and not erroring out then it could be your mobo. It has been my experience with three different intel boards that if you are pushing upwards of 280ish fsb then and using anythingn other than the 2:3 divider then the individual board might not be able to handle the speed and memtest will freeze. Granted this is just my experience and others have not had problems running 1:1 or 5:4 with a fsb over 280/290ish.

[jonspd]

I agree with the g-skill LE stuff as it's suspose to be the best on the market AFAIK.

[MassiveOverkill]

I'm using the KomUSA PC4200. It's now down to $209. See my sig for results.

[Super Nade]

Actually, if memtest is freezing, and not erroring out then it could be your mobo. It has been my experience with three different intel boards that if you are pushing upwards of 280ish fsb then and using anythingn other than the 2:3 divider then the individual board might not be able to handle the speed and memtest will freeze. Granted this is just my experience and others have not had problems running 1:1 or 5:4 with a fsb over 280/290ish.

Could you elaborate on your deduction? Why do you think its the MoBo?

[glock19owner]

I agree with the g-skill LE stuff as it's suspose to be the best on the market AFAIK.

Actually the LA's are the best since they are rated at DDR600 8-4-4-2.5 ;) and can achieve DDR700+...

But the LE's are the best 1G kit if needing/wanting 1G of memory...

[Helsyeah]

Could you elaborate on your deduction? Why do you think its the MoBo?

Again, all i can cite is my own personal experience, but this is why i would suspect the motherboard:

My processor i have dual prime tested and burned in to where it will will run 3.6ghz with 1.575 vcore and not fail, but using the 3:2 divider.

I have a gig of corsair bh5, which i have memtested completely stable up to 254mhz with 3.4 volts and up to 260 with 3.5+ volts. All the testing has been accomplished using the 1:1 divider in my is7-e (R.I.P., different story).

In the search for board with gigabit ethernet and then fully workin PAT features, i picked up an is7-g and then an IC7-MAX3. With my IS7-E i was able to run 284fsb with the 5:4 divider, running the memory @227 mhz. At these setting i had not a single problem and was bomb proof, 24/7/365 (until a multimeter probe slipped... and now R.I.P. :cry: ).

When i got the IS7-G I proceeded to drop everything onto it and tried to just run with 284fsb. The board would post.. barely. If it would even get into a memtest screen at these settings it would freeze before any tests were started. So I backed down the fsb and eventually found that the highest stable fsb it could run was 275fsb using the 5:4 divider. Anything higher than this would cause memtest to freeze after 30 to 120 minutes...

I then got the MAX3 and ran into an the exact same problem, and found that the highest memtest stable speed was only 270fsb, using the 5:4 divider.

Now, using the 3:2 divider on both the MAX3 and the IS7-G i could easily run up to 300fsb and have complete stability in memtest and also prime.

Through additional testing i found that the highest setting that the IS7-E can run completely stable with the 5:4 divider was 286/287ish fsb. Anything above that would also freeze memtest in half to two hours.

So based on my experience above, and the fact that memtest is actually freezing and not causing errors leads me to point a finger at the board.

To rule out all doubt, perhaps set the nbstrap to 533 and change the divider to 3:4 so the ram is clocked ahead of the fsb speed. Assuming there isnt anything buggy with the 3:4 ratio, this would let Vio find the max frequency that the memory can run without having to ramp the fsb up so much.

[ChuckS]

http://www.shikatronics.com/shikaxram/prod_perf_en.asp
http://www.anandtech.com/memory/showdoc.html?i=2098

These will do the trick. Running 292 fsb 1:1 right now... See my sig for other details on my system.

[Super Nade]

Helsyeah:
Thanks for the detailed reply :thup:
Could your problems with a flaky divider be a BIOS issue? Did you try a modded BIOS (if available)?

Sorry for the threadjack!

I would also recommend the GSKill LE's. According to madshrimps the PDP/Patriot XBL is the better performer (can't find the link ATM ..i'll update). But, I've not had a good experience with PDP and I've sent one out on RMA.

[Helsyeah]

lol, to continue the thread jack, sorry guys

Helsyeah:
Thanks for the detailed reply :thup:
Could your problems with a flaky divider be a BIOS issue? Did you try a modded BIOS (if available)?

Initially i thought that this was indeed the issue and tried any and all bioses for both the IS7-G and MAX3 but not one resulted in an increase in the maximum stable frequency i could run with the 5:4 divider.

I did find out, in my own personal testing, that on both the IS7's and MAX3 the northbridge showed a certain amount of sensitivity to changes in its voltage supply when looking at the stability of using the 5:4 divider. I have modded all three boards to be able to increase the northbridge voltage which, on a side note IS NOT LINKED TO THE AGP VOLTAGE!! ok, sorry, ive seen too many posts citing a correlation between agp voltage and northbridge voltage on ABIT 865 and 875 mobos, which does not exist. The stability gained from increaseing the agp voltages is not a result of a percived increase in northbridge voltage. k, im off the soap box :) and on with the thread jack...

I found that each board had a sweet spot around 1.55 volts for the northbridge where I could squeeze out maybe one or two more mhz on the fsb with the 5:4 ratio. Each board was slightly different and by changing the northbridge voltage by as little as 0.01 volts on either side of the sweet spot resulted in lossing the marginal stablity and gain in fsb.

I do know that hipro5, the one who has written a very detailed mod guide for the IC7 family of boards, also ran into the divider problem and to my knowledge was never able to fix it, via a mod or bios change.

I also know of a couple of the more promenent overclockers over at XS ran into this same problem with a DFI p-t board.

All in all, i believe that it is a limitation of the 865/875 chipsets, specifcially individual northbridge chips. Like anything else we deal with, i think that it takes a certain amount of luck to get a mobo that will do upwards of 290fsb and be able to use the 5:4 or 1:1 divider.

However, now that you have mentioned it, i will see what i can dig up for more recently modded bioses and if i find anything of interest i will start a thread.

Ok, you guys can have the thread back now ;)