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PIII 800 Overclocking prob ...........

U

undercover

Senior member
This is what I have:

PIII 800e (100mhz) Slot-1
A-Corp 81-BX mobo (133mhz capable)DMA33 Intel 82443 BX AGP Chipset, I think
1-PNY 64MB PC100 RAM
1-Micron 128 PC100 RAM
1-Micron 128 PC133 RAM

I tried to change the CAS to : 2,2,2 and 2,3,2 ...... It always comes back and says it doesn't like it, but will boot.

Now, when I do that and try to change the bus to 124 which would make my CPU 992, but will NOT boot. It hangs on "Verifying DMAPool Data......"

I cannot figure out how to change the voltage on my board. (see above) Any help is great. Any combos I should try?

uc
 
With your particular mix of ram, cas2 is unlikely. 124 is not an ideal fsb. You probably have no way of changing the voltage on an a-corp board, if you had a fcpga when a slocket could do it.
 
I have a similar set-up but using an Abit BX6r2. I've found the following:

1. My PC100 memory will only go to above 112mhz if the CAS is set to 3,3,3. The micron PC133 will handle the 222 at 124 but only if it's the only memory in the system. (if your chips are -75 they're only guaranteed to run 133MHZ at timing 3,3,3.

2. To reach 992MHZ I needed to bump the voltage to 1.85V

3. I was having some problems with my video card which were resolved when I backed off on the video overclock. (voodoo3)

Try just the PC133 with 3,3,3 timing (this is the most forgiving) and maybe you'll have better results. Don't expect the PC100 to work at CAS 2 - only the highest quality PC100 sticks with select chips seem to be able to run at 124 CAS2.
 
OK, I checked and the voltage selection is accomplished by the CPU module. With a Slot 1 CPU and that motherboard you're sort of stuck with what the CPU tells your mobo to generate for core voltage. I didn't see where the 124MHZ FSB is selected but if it's there it's there. It's sort of a plain-wrap BX motherboard and not extremely overclock friendly without voltage selection - guess that's another vote for going the FCPGA route with a slocket to let you select voltage.
 
Most 800's aren't very good overclockers. You might want to try an asus p3v... anyway there slot 1 version to run that chip on and see if you can get it to run faster🙂
 
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