Memory failure in overclock?

[footman]

Ive just put in an opty 165 to overclock and thought at he same time I would "upgrade" from my Corsair 2GB DDR XMS3200C2PT TwinX to G.Skill 2GB DDR HZ PC4000 (2x1GB).

The overclock was problematic up to 9x290 and impossible after that. I loosened the GSkill timings (not sure how!) but running prime95 on blend and large FFT's gave an almost immediate failure with the error "illegal sumout, possible hardware failure".

I took out the GSkill and put back the Corsair.The overclock up to 2610 MHz was dead easy and I could take it a bit beyond, but it was unstable, possibly because timings were too tight (3,3,3,7 1T) and I know almost nothing about slackening timings. Tne Corsair is running at 237Mhz now which is probably max for it.

Since the Corsair is priming away happily now and the GSkill couldnt last 30 seconds is this grounds for RMA?

thanks for looking

 

[Minstadave]

If it can't run stock then RMA is probably in order. You can try bumping Vdimm to 2.8v and see it that helps, it should run at 250Mhz at:

CAS 3
tRP 4
tRCD 4
tRAS 8

 

[Dutch Guy]

Do you run the memory at the same speed as the FSB? (HTT)

If so why not try it with the CPU at 290Mhz and the memory at the 5:6 divider (set memory to 166Mhz in the BIOS)
That way the memory will run at 241Mhz so close to stock speed and use the rated 3-4-4-8-1T timings

 

[footman]

the motherboard automatically set the divider to 166Mhz. OClockers have kindly given me an RMA so Ive now got to decide what RAM to get!
thanks for the replies.