From your sig, u got Apacer DDR2700......which might be the culprit? For Socket A, better use 1:1 SO, i suggest u to run 3-4-4-11 and see the highest FSB (prime stable too).

my 2500+ run at 3200+ on nf7-s at 1.775vcore. Try increase your vcore

dennis..aren't you using an unlocked 2500+? the rig in your sig says AXP1800+ are you using another rig for hte 2500+ or did you replace your 1800+ with ur 2500+

unlocked 2500+ should reach 12.5 x 200 easily..even with normal ValueRAMs.
with a good stepping u can run it at default vCore, if not, increase ur vCore a lil

This post has been edited by gr2000: Nov 12 2005, 08:33 PM

hmm
i'm using a nforce 2 mobo to..
had no problem bumping up straight to 200MHz

Ok, i try again. what is the optimum clock for 2500+? i need to run it long period coz need to render lot's of 3D (maya)

2500+'s default clock is 11x166

Oh man, my windows just crash!!! Once the clock gets over 1992Mhz, windows won't boot. Can anyone tell me what's going on? Your guys can OC so smoothly.... (sad)

This post has been edited by dennisdreams: Nov 12 2005, 09:15 PM

wats your current vCore? have you tried raising it?

i've heard many times ppl with 2500+ have no problem raising straight to FSB200 on a NF2 mainboard..maybe u need to raise ur vCore stock is 1.65 right? try 1.7v..

if your PC manages to boot to desktop or boot to the windows logon screen but hangs halfway or lags like crap, raise vCore until u can load to desktop smoothly.
(you dont necessarily have to touch your RAM Timings..you can leave em at Optimal)

oh another thing..make sure your "FSB Spread Spectrum" option is Disabled
and if your mainboard has the "Enhance PCI Performance" you might wanna disable it as well..i managed to clock higher with that option Disabled

This post has been edited by gr2000: Nov 12 2005, 09:21 PM

The Vcore now is 1.712, and I'm running at 12.0X166 with no problem. Computer can't boot into windows either on 12.5X166 or 11.0X175+ RAM I keep it lower then 333 already.

in ur BIOS,

FSB Spread Spectrum - Disabled
Enhance PCI Performance - Disabled

"FSB Spread Spectrum" sometimes is also called "Spread Spectrum Modulated"

having the benefit of a unlocked cpu is fun..but..u normally adjust more on the FSB rather than the multi...try using x12 multiplier and gradually increase ur FSB.

This post has been edited by gr2000: Nov 12 2005, 09:28 PM

Ok, I'll try after running the SP2004 first on current state. let it run about 15 minutes. I'll post later on the progress, thanks a lot.

Failed...... Can't boot-up into bios either 12.0X174+ 11.0X174+ with both
FSB Spread Spectrum - Disabled
Enhance PCI Performance - Disabled
I think I'll just keep it at 12.0X166 for normal used first. Ask someone expert enough to check it out for me. Thanks guys for all the comment

I use 1.8vcore for xp. Try to raise it up to 1.8

take note that desktop bartons need higher voltages for OC
mine runs at 1.9v

I know, but mine stable at 1.8Vcore for xp but currently at 1.775 for 2000 (sejuk sikit)

haha mine 1.9v at 2470Mhz...

Case 33 CPU 56(load)
Case 33 CPU 49-50(idle)

This post has been edited by gr2000: Nov 12 2005, 10:07 PM

Wow, 1.65 to 1.9!!! It's ok now, I think 2000Mhz is currently enough for my normal usage. Later try to OC again with my friends with experience. Thanks everyone.

haha yes..i need 1.95v for prime stable...
but 1.9v runs fine as well..not prime stable..but can leave on for the whole day..play games do whatever...wont crash =)

Connot brag on cpu temp coz using crappy hsf.
Case 40 CPU 63(load)
Case 33 CPU 49-56(idle)

hmm i suppose for HSF xp90 + delta would do the trick