Old CPU OC (Barton 2500+)

Hey I read through the OC guide at the top, but i just wanted a few questions answered.

When i'm in bios, it says i can change the multiplier, but CPU-Z says it never changes. It shows 11x and my bios say 12x when i look at it. Here's a screeny of what i'm at now:


Anyways, I'm just curious as to what I should do from here. I haven't done stress tests or anything yet cuz it's late, but i'm running about 47C just with CPUZ and firefox open. So i'm guessing load i'll be about 60C, which from what i hear is about right. I want to have a 200x12 but is there any way to get it to activate? I figurd if i had a locked CPU it just wouldn't let me edit it in bios... or I could be wrong.

*EDIT* Also, I ran some prime95 tests last night and I only made it 9 minutes before it errored. I'm running at 1.75V I believe, do you guys think i should keep stepping it up or am I going to get too hot soon, and should just turn it down a few on the fsb? I kinda want that 400...

I used to have this chip and if I remember with my motherboard I had to boost the FSB with jumpers, so maybe look at your motherboard documentation first. I think you'll be getting a better result with raising the FSB rather than the multiplier with a jumper mod.

I got my old 2500+ xp -M running at 204 x 11 which is about 2240 mhz. I used to have it running at 2.85 ghz stable! I could run benchmarks at 3 gig. But that was with a Prometia phase change cooler.

Anyway, as others pointed out, you can still increase the FSB to OC that Barton

I'm using a huge copper ThermalTake hs/fan it's about a 72mm i think or somethin around there. Running it at 5100 rpm. i probably need to take it off and reseat it as i've already been using the dang thing for over 3 years now i think. But ya I'm just trying to push a little more out of it before i buy my new set. I'll try raising the voltages one more notch, if that doesn't fix it then i'll scale it down.