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 DDR 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

 

[imported_Buckster]

Spectrum spread to Auto ? I thought there was only Off or On ?

My DDR 800-5-5-5 Corsair is very unclockable - what have you got the memory set to? 4:5 or 1:1 ?

Will try large FFT on mine and get back to you - as almost exact same setup - how long before it came up with errors with large FFT ?

I'm currently running 333 @ 1.35V @ 4:5 memory

Mark.

 

[imported_Buckster]

just tried on mine - ran 20 mins no errors ?

 

[theprodigalrebel]

Originally posted by: 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 DDR 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

At 333FSB with the 667 divider, your memory is running at 416MHz (832MHz effective). Try bumping up the voltage or using the 1:1 ratio (DDR2 533) to lower memory speed.

 

[cmdrdredd]

First problem... Your FSB speed. It's not too high, IT IS TOO LOW. The P5B Deluxe always errors out between 320 and 380. Jump up to 400Mhz and drop the multi down to say 8x and that gives you 3.2Ghz. Run your memory at 1:1 (DDR2-533 option in BIOS). Try a higher vcore of say 1.4 and go from there.

Everything else you set looks great. If it runs stable you can try the standard 9x multi. Also turn off every option under CPU Configuration in the BIOS except vanderpool tecnology. You can leave that enabled.

edit: just for your information. I run my E6400 at 3.2Ghz with 1.4vcore and it idles (after heating up to standard temp) at 50-51c. Load is 60c or around there.

Your ambient room temp plays a huge role in CPU temps too. Remember that as well.