OC Help Needed for New Cruncher

[grendel8]

I've just finished assembling a rackmount cruncher and need some OC advice. My parts list is as follows:

Biostar M7NGC 400 mb
Athlon XP 2600+ (barton)
(2) OCZ CL2 PC3200 DDR sticks

all in a Dynapower rackmount case. At the default settings (166mhz X 11.5), I get a 333 FSB, dual channel and pretty decent preformance, but... I'd like to crank it up a notch.

I've tried changing the multiplier and it appears that I have a multiplier locked CPU. No POST at anything I tried other than 11.5. I've increased the FSB to 175 (350) at the stock voltage with no problems and am showing 2.017ghz in CPU-z and everything is stable. Anything higher causes a series of beeps and lockup when I POST. Increasing CPU voltage to 1.75 doesn't help.

Any idea's on additional things I might try? An article I read said that nForce2 boards are usually able to unlock the CPU, but that doesn't seem to be the case here. The review said there were able to get theirs to 11.5 X 205 at 1.85 volts and that was my original goal.

Thanks!

grendel :beer:

 

[BigFatCow]

Originally posted by: grendel8
I've just finished assembling a rackmount cruncher and need some OC advice. My parts list is as follows:

Biostar M7NGC 400 mb
Athlon XP 2600+ (barton)
(2) OCZ CL2 PC3200 DDR sticks

all in a Dynapower rackmount case. At the default settings (166mhz X 11.5), I get a 333 FSB, dual channel and pretty decent preformance, but... I'd like to crank it up a notch.

I've tried changing the multiplier and it appears that I have a multiplier locked CPU. No POST at anything I tried other than 11.5. I've increased the FSB to 175 (350) at the stock voltage with no problems and am showing 2.017ghz in CPU-z and everything is stable. Anything higher causes a series of beeps and lockup when I POST. Increasing CPU voltage to 1.75 doesn't help.

Any idea's on additional things I might try? An article I read said that nForce2 boards are usually able to unlock the CPU, but that doesn't seem to be the case here. The review said there were able to get theirs to 11.5 X 205 at 1.85 volts and that was my original goal.

Thanks!

grendel :beer:

all of the newer bartons are locked to where the nforce2 boards cant unlock them.

Check all of your temps, try upping the ram voltage, i had to up my corsair one notch to get 200 FSB, but i got 175 easy.

 

[ericlp]

Hmmm Just what kind of WU times are you getting with a barton 2600?

Thanks... Just remember AMD's already run HOT, and SPRING/Summer is around the corner. You may want to think about it when the fall gets here again, unless you have AC. OR you have a really good FANS. Stock coolers just don't cut Over Clocking well.

You may want to try posting this on the CPU forum.

Good Luck.

 

[grendel8]

Thanks for the quick responses.

SETISpy shows WU completion times from 2:08 to 2:30 at 175mhz FSB. It's only been running for around 6 hours, so I'm still trying to get a feel for what it's capable of. Temp has been steady at 49C. It's going to end up in a vented cabinet in the basement (hopefully with quite a few friends) and it stays pretty cool down there.

I'll try upping the memory voltage tomorrow to see if that improves things. Thanks again.

grendel