overclocking PIII 500 slot 1

[giant69]

For an OC'ing speed for your system, you should be able to achieve around 665 with no problem.I've got a P-III 550@733 on my BE-6. I'm running a FCPGA though.I've got Micron PC100 in mine and Ive got it runing @ 133 with no prob. If I try to go up to 140 FSB, my system locks soon after booting. There could be several reasons why your system wont go higher that 600 and they arent all related directly to the CPU.
1. RAM Speed/brand. This is most likely your problem. Try running a stick of 133 if you arent already doing so.
2. Volts. The Slot 1 cpu seems to need more volts that the FC due to die size and internal heat dissipation(or lack of).You might need to tweak it up a lil bit more.
3. AGP/PCI bus might not be able to handle FSB with current video. What brand of video card are you using? Are you keeping the div. set at 2/3 to keep AGP bus at 66mhz?
4. Are you using the Hot Rod 66 controller? I found that my success stability and overclockability rose after switching over to the standard IDE controller. Ive had nothing but trouble with the Ultra 66 controller.
5. Are you using the Soft menu or the dip switches to increase your FSB? If the soft menu, make sure of the div. on the bus setting.. (i.e. 1/4 equates as 133 and 1/3 equates as 100 bus speed.)I was astonished to see the difference between 133 1/4 and 133 1/3. Mine wouldnt even run at 133 1/3!
This is the first few things that I could think of to examine. Good luck and keep us posted
Steve


[This message has been edited by giant69 (edited 11-24-2000).]

[IFReeman]

Hi fshanda, I very much doubt, even with the extra cooling, that you will get to anything above 124 FSB, because I presume (and I could be wrong) that yours is the older 0.25micron core (Katmai) which do not overclock aswell as the newer 0.18 micron core (coppermines).
I have also got a PIII 500 (Katmai core) and the most I can get it to is 124 FSB (620 Mhz) and this is with a large Alpha heatsink and double fan combo, extra case cooling and on a very cold day!

So if you want to go further you will have to get the newer 0.18 micron chips. If you do make sure you buy the 100Mhz FSB chips denoted by the "E" after the processor speed as these will give better overclocking results than the 133mhz FSB chips.

Hope this helps

Iain

[fshanda]

I do have the 0.25 micron katami core processor and I was correct thinking I had just about reached my limit. I have some 133mb ram on the way, $69.00 a stick was to good a deal to let go. I have a Voodoo 3500 agp card and the agp buss set to 1/4. I figured a little less juice would be more stable than to much. Please explain about the div. on the bus setting. are you talking about the agp settings or settings for the ram. I havent messed with any settings for the ram yet. I'm still a little weary of changing these settings. I think I will read the manual about 10 more times before I mess with them. I really do like the Soft Menu, makes changes to bios almost to easy.

Fshanda

[falcompsx]

i have a katmai p3 500 running at 590 with a golden orb on it, stable, no problems, dont expect to get much higher then 600 max, the katmai's topped out at 600.

[fshanda]

How high can I expect to overclock a PIII 500mHz slot 1 processor. Im running at 600mHz 119fsb 2.05v on an Abit BE6II mb. As soon as I try setting my fsb to 120 or higher my system locks up, it will boot to my desktop but freezes soon after. I have tried to set the voltage higher at 120fsb and and other fsb settings with no luck. I have an after market heatsink fan combo installed with additional case cooling. Any suggestions, this dosn't seem to be a popular processor for overclocking and I cant find many posts with overclocking information about it.

[giant69]

Sory if I confused you with:
--------------------------------------------
If the soft menu, make sure of the div. on the bus setting.. (i.e. 1/4 equates as 133 and 1/3 equates as 100 bus speed.)I was astonished to see the difference between 133 1/4 and 133 1/3. Mine wouldnt even run at 133 1/3!
--------------------------------------------
What I was trying to get across was PCI bus speed.. IOW PCI Clock Divider Ratios: 1/2 on 75 - 83MHz, 1/3 on 100 - 120MHz, 1/4 on 124 - 150MHz

As you have seen in the Soft Menu, there is mult. settings for upper FSB w/ PCI divider ratios. My puter wouldnt run 133 1/3 but would run 133 1/4...Have you tried both settings?
Sorry for the confusion !!

[fshanda]

Yes I tried both settings and didn't really see much of a difference. I think I will just remain happy with the results I have. Well at least until I have some more cash burning a hole in my pocket. Then the next question will be what to upgrade to next.
Fshanda