First Time Oc'er

[Cephus]

I have an old katmai PIII running at 450MHz, with 128MB of Micron PC100 Ram and 128MB of PC133 Micron RAM for a total of 256 on an Asus P2B mainboard. I have never overclocked anything before. I have tried several sites for info. but since my computer is older I have found none that have helped me. Is this CPU locked? is the FSB the only option? Take out the old PC100 Ram? I really have no clue at what I am doing here. Please help.Thanks.

[Phil]

The multiplyer on this chip will be locked so you will have to overclock via the fsb, 112mhz fsb should be fine gving you around 500mhz but keep pushing up in small incriments until it becomes unstable in windows (i.e. games start crashing, I find quake 3 the best test of my system stability) then increase the vcore a notch until it is stable, I would expect the highest you would get is about 550mhz or so and this may take 2.1v or 2.2v or so. you should be ok leaving your ram in it as pc100 ram can normally take speeds of around 125mhz sometimes 133mhz

[batboy]

Most PC-100 memory is good for a little overclocking. Unless your RAM is totally worthless, it should be good for at least 112 MHz or more. I'm pretty sure that CPU is locked, so bus speed is the thing to change. Overclocking requires good cooling and sometimes a bump up in CPU voltage. Good luck!

[[OC]_SR20DE]

I have seen some of the PC100 64MB RAM doing 155- 160mhz FSB@ CAS3 and 145- 150mhz @ CAS2. It's amazing... and very impressive. One of them I can remember is from "Azzo". Darn... I dont remember exactly what model it was. Especially the RAM with smaller MB amount i.e. 64MB are even easier to overclock. In the past... I had a one stick of PC133 128MB and another stick of PC100 64MB of RAM and cranked the bus speed to 145mhz and that was damn good for PC100 RAM.