e6600 @ 333fsb - P95 Large FFT errors

[spiderhole]

I'm trying to oc my e6600/P5B Dlx rig to 333fsb. All is fine at 300 and 320, but when I go up to 333 I start getting rounding errors when running Prime95 LARGE FFT test. The SMALL FFT test runs fine for hours with no errors.

Here are my settings...

FSB = 333
DRAM = 666
PCI = Locked @ 33.3
PCIE = Locked @ 100
Spectrum Spread = DISABLED
CPU Core V = Tried between 1.3 and 1.35
DRAM Timing = 5-5-5-15
Static Read Control = Tried both AUTO and DISABLED

Am I correct in assuming that since only the Large FFT test fails my issue probably lies with memory? My ram is Corsair Twin2X DDR2 800 5-5-5 (2gb, 1gbx2) I've noticed that other here have been using SPECTRUM SPREAD set to AUTO. Should i try that?

Also, what about increasing the voltage to my VCore? I've only gone as high as 1.35 since my cpu tends to run a little hotter than the average 6600.

Thanks

[MadMan007]

Did you set your Ram voltage to whatever the default for that set is? Also if it has a range for the ram voltage like 1.9-2.2 or whatever try starting at the low end of the range and moving it up if it fails.

*edit* Hm mabye not, I looked it up and it's 1.9V, set it to that if you haven't but it isn't high default voltage so that shouldn't be an issue. Try the spectrum spread setting then ;) Also a way to isolate Ram vs CPU issues is memtest86.

[Burdman27911]

I'd try to run Memtest 86+ and make sure you are getting errors (most likely you are, and your problem is with the ram). Sometimes I just like to be thorough and make sure I can find where my weak link is.

I'd then try upping the Vdimm (ram voltage) and maybe loosening them as well if needed,... best of luck!

[Barkiss]

You don't mention your Vdimm (Dram Voltage) settings. I would set the Vdimm to 2.0V. I also find that dropping the multiplier and raising the FSB on the 6600 can yield some good benefits.

Try dropping your multiplier to 8 and raising your FSB to 400MHz. Dram to a 2X multiplier. You mention heat concerns. What is your idle and full load (Orthos) temperatures when set to stock and overclocked?

[spiderhole]

Dram Voltage is set to AUTO I think (will double check when I get home)

For a good idea of my temps check out this thread...

http://www.ocforums.com/showthread.php?t=479832

I'm having some heat issues that may or may not be due to concave IHS.

-M

You don't mention your Vdimm (Dram Voltage) settings. I would set the Vdimm to 2.0V. I also find that dropping the multiplier and raising the FSB on the 6600 can yield some good benefits.

Try dropping your multiplier to 8 and raising your FSB to 400MHz. Dram to a 2X multiplier. You mention heat concerns. What is your idle and full load (Orthos) temperatures when set to stock and overclocked?