What Corsair XMS Ram to buy

Corsair XMS CMX512-2700LL 2-2-2-5-T1
Corsair XMS CMX512-3200C2 2-3-3-6-T1
Corsair XMS CMX512-3200LL 2-3-2-6-T1
Corsair XMS CMX512-3500C2 2-3-3-7-T1
Corsair XMS CMX512-3700 3-4-4-8
Corsair XMS CMX512-4000 3-4-4-8

The PC4000, PC3700, and PC3500 is programed to JEDEC 3200 SPEC
While the PC3200 and PC2700 are JEDEC SPEC

The PC3700 and PC4000 use the same timings, and the only difference is the REQ Voltage to run the RAM with the PC4000 needing .05V higher for a total of 1.75V.

Then Comes the PC3200. Its almost 2x the price for the Low latency version.

And the PC2700 Having the lowest latency of them all

This Ram will be going in a Abit NF7-S motherboard with a barton 2500+

I am almost thinking THIS IS ALL THE SAME RAM
all Corsair is doing is slowing down the timings a little and then slightly upping the Vdimm to get it to run at the needed speed.

Anyone have any comments on this or recomendations?
Or does anyone know of any company making PC3700 to the new JEDEC PC3700 SPEC?

well I have the 3500 C2 and I can hit 223mhz at the tightest timings. Best ram Ive ever had.

USAPGAPRO said:

well I have the 3500 C2 and I can hit 223mhz at the tightest timings. Best ram Ive ever had.

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how many Mhz could you get out of it with slightly slower timings?
as you are only running the RAM 7MHz higher than what its rated for (faster timings aswell)...
also what voltage you running it at?

anyone else with some imput?
AS or right now i am leaning on the PC3200LL or the PC3700

Anyone know what the odds of either stick of RAM hitting PC4000 Speeds aka 250FSB? relaxted timing would be fine.

Jay, I believe most of that RAM is pretty much the same, but the faster the RAM is rated, the more it's tested. For example, the PC4000 must pass higher quality controls to make the grade. The faster the RAM modules, the more relaxed the settings generally have to be and the higher the "default" voltage. They learned from us overclockers.

I've heard of peeps taking Kingston PC2700 or Twinmos PC3200 and running it at DDR466+ (PC3700 speeds). There will always be someone that claims to be running cheap RAM at unholy speeds. Does that mean it's a sure thing? Of course not. But, these nForce chipsets do seem to be able to squeeze a lot outta RAM.

Will the PC3500 C2 hit DDR500? Maybe, I have seen it go DDR470-480 many times. If you want RAM to hit a guaranteed 250+ FSB using the 1:1 ratio, then maybe spend the money and buy PC4000.

I personally will not buy Corsair ever again. As I type this I'm running memtest86 on a 512meg stick or Corsair 3200C2 that I just got from UPS. I already have 43000 errors at 200Mhz and default timings. And this is the replacement I got for my RMA two weeks ago. The first stick I had gave about 500 errors at advertised speeds, this replacement I'm seeing if I can break some world record for memtest errors.

I'm going to return this, and get some Kingston, Mushkin, or Crucial. I know Crucial's good, but they don't have low enough timings. So all in all, I should have a working stick of RAM at 200Mhz when it's completely obsolete.

TwistedAnimator said:

I personally will not buy Corsair ever again. As I type this I'm running memtest86 on a 512meg stick or Corsair 3200C2 that I just got from UPS. I already have 43000 errors at 200Mhz and default timings. And this is the replacement I got for my RMA two weeks ago. The first stick I had gave about 500 errors at advertised speeds, this replacement I'm seeing if I can break some world record for memtest errors.

I'm going to return this, and get some Kingston, Mushkin, or Crucial. I know Crucial's good, but they don't have low enough timings. So all in all, I should have a working stick of RAM at 200Mhz when it's completely obsolete.

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I thought I'd mention that I'm running a 512mb stick of Crucial PC2100 at 2-5-2-T1, rock stable. My 1.4ghz athlon AYHJA tbird is clocked at 1584mhz (144mhz FSB x11).

FACT
Overclocking is an adictive drug.

FACT
I cracked and bought 512MB of PC4000
i'll let you all know how it turns out in a day or too...
250+FSB here i come

thanks for all the input

I personally have Corsair 3500 ram and to tell you the truth, I hate it.

Must be oc'ed sticks to begin with, cos they oc like garbage.

the new ocz looks promising

phrowzen said:

I personally have Corsair 3500 ram and to tell you the truth, I hate it.

Must be oc'ed sticks to begin with, cos they oc like garbage.

the new ocz looks promising

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yes they are already overclocked.
their is no spec for PC3500 and Corsair states that the RAM is buit to PC3200 spec.
PC3700 however has just become spec, and it will be interesting how PC3700 modules do that are built to spec

I'm pretty sure Corsair recommends the Corsair XMS CMX512-3200LL for overclocking AMD cpu's. You might check out the house of help for more info on this topic. linkage They have the "official" Corsair memory support forum there.

Good luck...

webfreak said:

I thought I'd mention that I'm running a 512mb stick of Crucial PC2100 at 2-5-2-T1, rock stable. My 1.4ghz athlon AYHJA tbird is clocked at 1584mhz (144mhz FSB x11).

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That's awesome! For the time being I'm running two 256meg sticks of crucial pc2100. I have them at 133mhz because I'm way too busy with school now to find how high they can go. But I think I'll stay up late tonight and investigate...

i also have 2 sticks of 256 pc2100, i can run 145 fsb with em easily at cas2 t1 timings, i havent actually tried running lower timings on the other settings.

TwistedAnimator said:

That's awesome! For the time being I'm running two 256meg sticks of crucial pc2100. I have them at 133mhz because I'm way too busy with school now to find how high they can go. But I think I'll stay up late tonight and investigate...

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Good luck . This being kind of a delayed response though, how did it turn out?