OC'ing 2500+ to 2800+

[sweatlaserxp]

I OC'ing my Athlon 2500+ to 2800+. I am keeping the FSB at 166 as I am using PC2700, and anyway I just want to squeeze a little more juice out of my Athlon. I am going to set the CPU multiplier to 12.5, but I don't know what the CPU voltage should be stepped up to. Can anyone let me know the proper voltage setting? Thanks.

 

[scottchen]

Push the FSB to the max first, FSB increase gets you more performance than multiplier increase. If you're using stock cool, then nothing more than 1.75V what's the rest of your setup, what kind of mobo, what memory brand?

-Intel PIV 2.4C @ 3.84G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800pro @ 490/780 -SB audigy -80G Maxtor Diamond Plus9 Ultra ATA-133 hdd -450 Enermax PSU

 

[addiarmadar]

1.7-1.75 volts should do the trick but dont be surprised if you do not notice any change in performance. Increasing the clock speeds is where you will notice the change.

F-DISK-Format-Reinstal DO DA!! DO DA!!

 

[scottchen]

Trust me FSB gives you much more performance because of the massive increase in Bandwidth.

-Intel PIV 2.4C @ 3.84G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800pro @ 490/780 -SB audigy -80G Maxtor Diamond Plus9 Ultra ATA-133 hdd -450 Enermax PSU

 

[sweatlaserxp]

Asus A7N8X Deluxe Rev. 2 (nforce2 Ultra400)
Athlon 2500+ (stock HSF)
2x256 Corsair XMS PC2700, CL2.0, Dual-Channel

Here's the problem: I've been using a hunk-a-junk 300W generic power supply that cost like, oohhhh, $13, so you can imagine the reliability. I've seen my computer reset while OC'ing my CPU and Ti4200, mostly during 3DMark03.
BUT... I have a Fortron-Source FSP400-60PFN(12V) 400W arriving next week, so that should provide plenty of headroom plus room for future upgrades (9800NP).

When I install that, I want to OC my 2500 up to 2800. But what you say about kicking the FSB up to 400 is interesting, and I think I'll do that. Here's the thing though- isn't there a reason why you are suppose to synchronize your CPU external freq. and FSB clock?
166 * 2 = 333FSB
My friend who helped me build this computer said that I shouldn't set the FSB to 400 because it violates that formula; however, some of you guys probably know a lot more than he does. I now know that if I set the multiplier to 12.5 then I should set the CPU voltage to 1.75, but if I can stably use the 200 MHz FSB then by all means... what's the deal with this FSB stuff?

 

[sweatlaserxp]

On second thought guys, don't bother to reply. I should be able to sift around the forum and find all the answers to my questions, especially considering the popularity of the 2500. Thanks for the help.

 

[scottchen]

I must reply so i can get promoted again Ok here's what you do, you got an excellent mobo and ram, so let's push them to their max. First vcore to 1.75 then change the FSB to 200mhz don't touch the multiplier. Computer should boot, now your mobo will identify your CPU as a 3200+. But that's not fast enough for most people, keep pushing your FSB until your computer stopped booting, then push the Vimm to 2.8 and you should be able to hit 210mhz FSB and that's really impressive with stock cool. You just got better than top-of-the-line AMD CPU.

-Intel PIV 2.4C @ 3.84G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800pro @ 490/780 -SB audigy -80G Maxtor Diamond Plus9 Ultra ATA-133 hdd -450 Enermax PSU

 

[TomaHawK]

will that work with 2500 barton, 2x256 MB DDR Corsair PC3200/400 CL 2, Corsair XMS LL and the epox 8RDA3+ Board too?
fan: Arctic Copper Silent2 TC it's up to 3200mhz.
a detailed HOWTO would be greatly apreciated, will i need more cooling??
Beat the heat with the USB-Powered Fan

 

[scottchen]

2500+ are crazy overclockers. I can't really help because I don't have your mobo, basically the idea is this, first you push the FSB to its limit, by relaxing your ram timing to 2.5-3-3-10, your memory should do 215mhz which will get you a 3400+ if you don't touch the multiplier. I think that's a good enough OC.

-Intel PIV 2.4C @ 3.84G -Asus P4P800 -OCZ Copper 2x256 4000EL memory @ 275mhz 3-4-4-8 -Sapphire 9800pro @ 490/780 -SB audigy -80G Maxtor Diamond Plus9 Ultra ATA-133 hdd -450 Enermax PSU

 

[TomaHawK]

weeeeeeee sounds great to me! if i have further questions i'll make sure to ask you first.

Beat the heat with the USB-Powered Fan