How far can you push Corsair xms2?

[pignoli]

I have 2 gigs Corsair XMS2 PC6400, running beatifully at 1:1 400mhz fsb on my e6400 @3.2ghz, which I'm happy with.
Was just wondering if anyone else who had this RAM would be able to advise me how far I'd be likely to get beyond the rated 400mhz? It's on 4-4-4-12, so there's probably a bit of leeway, right?

 

[tomhole]

I got it to 950 with a 475 FSB, but had to back the timings off to 5-5-5-15. Of course I have the CL5 memory. If you have the CL4, it might work better.

Tom

 

[CompuTronix]

Corsair XMS 6400 C4, 933Mhz is my highest stable at 5-5-5-15 and 2.15V. 8)

 

[Nomans63]

I have 2GB Corsair XMS2 6400 CAS4 (TWINX2048-6400C4) running with the C2D E6600 on the Abit AB9 PRO pushing 525MHz (DDR2-1050) with 2.2 Volt VDIMM. I don't know how far I can push but I read somewhere that P965 chipset may have problem go further than 350 FSB which I'm at it right now.

 

[Nomans63]

BTW, my Corsair 6400C4 is running with relaxed memory timings 5-5-5-15 (Wusy sticky OC guide from this forum). Before, it was able to run with timings 4-4-4-12 only to DDR2-900 (450 MHz)

 

[tomhole]

My P965 chipset is happy as a lark at 400 FSB. Been stable for weeks now. It ran stable at 475 FSB as well.

Tom

 

[slim142]

Hmm according to this people, then 900mhz (450 each) should run normally. Higher than that is the challenge.

BTW, for you all, when did you have to increase the latency from 4 to 5? and when did you have to start increasing the voltages?

 

[tomhole]

I set the voltage at 1.9 from the start. I keep it at 2.1V for 400 FSB, although I'm not sure it needs it.

I made a direct jump from 400 FSB (DDR800) to FSB 475 (DDR950) because of a quirk in the P5B Deluxe bootstrap. Anything between 401 and 467 FSB is actually slower (memory wise) than just using 400 FSB. At 475, I had to up the voltage to 2.15 and loosen the timings to get memtest to pass.

Tom

 

[slim142]

Thanks! that helped me alot! once I start overclocking, I will keep that in mind

 

[outlw6669]

I have my XMS2 6400 CAS2 running at 1101MHz, 5-5-5-12 with 2.15V.
A 12H memtest +86 run latter and it is confermid stable.

I really think it could go further, unfortinatly my MB can't

 

[pignoli]

thanks for the tips all, I might try and get the beast to go a bit further then if I can keep the temperatures under control, should be able to get 450 out of them without loosening the timings by the looks of things...

 

[pignoli]

Hm, Orthos is throwing up errors as soon as I go to 410mhz fsb. Even when I raise vcore a notch and bring the ram down to 5-5-5-15.
Could this be my motherboard limiting me? it's a P5B vanilla and that's the only thing I can think of. Ideas anyone?