OC'd XP 2800

[SpeedMan88]

I've been trying to OC my xp 2800+ (barton) to run a 200 fsb with 10.5 multiplier. I upped the vcore to 1.75 volts, put the memory frequency on 100% so that it would run synchronous. My system boots into windows okay, and I can even take a cpu-z screenshot of it. However when I try to run 3dmark or any graphic intensive app it locks up. Anything you guys know of that I could do to get some stability with this? I get insane performance with this, but right now its unstable.

System specs: Asus A7N8x deluxe mobo w/ bios 1004, xp 2800+, 1 GB matched corsair ddr400, radeon 9500 pro w/ 9700 pro bios.

 

[Nights_L]

Heat?

 

[SpeedMan88]

I got it to run pcmark2002 with that configuration and my memory and cpu scores jumped by almost 400 points each vs stock configuration. The cpu runs at 41 deg C, mobo runs at 20 deg C. I live in a cold basement, thats why the mobo is so cold.

 

[unoc]

Your CPU officially supports a FSB of 166 MHz and increasing it to 200 may give stability problems when you use 100% of your CPU.
Try a little bit lower FSB even increasing the multiplier, maybe 11. You may try 198 FSB and 11 as for multiplier.
I have a 2700+ and it cannot run 3DMark 2003 at FSB higher then 195 MHz and 12.5x for multiplier (the core clock is 2437 MHz). I should be interested to compare on some benchmark my processor and yours, which performs a 512 kb cache, to see what is the weight of a big cache with respect to a higher clock speed.

______________________
<P ID="edit"><FONT SIZE=-1><EM>Edited by unoc on 06/05/03 02:10 AM.</EM></FONT></P>

 

[svol]

He's already using a lower multiplier... he's at 10.5x200=2100 MHz... which is close to stock.

There are three things I can think of:
1. Power shortage
2. Memory problems... try if you can run the memory at 166MHz while the FSB is at 200 MHz.
3. Northbridge overheating (the mobo temp is actually the case temp... feel the northbridge heatsink to see if it is hot).

My CPU fan spins so fast that it creates a wormhole