Need help overclock a 2.8C

[Nightkids]

Recently I bought a P4C800 E-Deluxe, Corsair xms4000, Slk947u and a Mayla SL6WJ 2.8C for some overclocking.

I am very disappointed with the results:

250 (1.6v - 1.7v) Pc will not boot up
245 (1.6v - 1.7v) memtest and prime95 failed, thousands of errors in memtest

240 (1.6v - 1.675v) prime95 failed after 4 hours
235 (1.6v) prime95 stable for 8 hours

Ram 2.75v (manual set timming in BIOS to 3 4 4 8)
AGP 1.5v
PAT enable

Please can someone help me with this? I need some advice on overclocking this 2.8c, I am not expecting much, will be very happy if it can do 245 - 250, because I really wanted to make my money worth for the ram which meant to be running at least 245. Do you think is the problem with the Bios? Should I roll back to previous version, or is this damm cpu?

[oc-rookie]

Open up mbm5 or asus probe while you have Prime running, watch the vcore to see if it's fluctuating too much. If it dips and prime freezes or crashes you should probably do the droop mod.

Use 2.85 vdimm, 1.65+ agp as well.

Which bios are you running?

[Slickthellama]

2.8Cs are flaky they either OC really well or really badly. You got a bum chip just like me. :(

[Nightkids]

Originally posted by oc-rookie
Open up mbm5 or asus probe while you have Prime running, watch the vcore to see if it's fluctuating too much. If it dips and prime freezes or crashes you should probably do the droop mod.

Use 2.85 vdimm, 1.65+ agp as well.

Which bios are you running?


When the prime is running the vcore going from 1.632 to 1.583, so I believe its fluctuating too much.
I am running the lastest bios 1016, I will try upper the vdimm and 1.65agp later.

but I doubt its the ram that hold me back.