ICantAffordIt, run 3dmark2001 and play Q3, either of those two programs will show if there is instability, either locking up or exiting on their own.
I have the p4s333, got it last week, make sure you check the cpu:mem ratio in the bios, if you are going for a big overclock you should leave it at 1:1 for memory speed=bus speed
if you run at 100mhz fsb for the cpu and you have ddr333 ram then set the ratio to 3:5 for 166mhz ram clock (=333ddr)
Determining the ram speed is a little complicated,
take your fsb speed and divide it by the first number of the ratio then multiply that by the second number of the ratio,
example........
for a 3:5 memory ratio at 100mhz fsb divide 100 by 3 = 33 times 5 = 166 mhz memory speed,
also the available ratios change depending on the fsb, so if you are at say 150fsb cpu the ratios are 1:1 4:3 and 4:5 (i think)
so if your cpu can handle 150mhz fsb then leave your memory at 1:1 (if your memory can do 150mhz)
or to have the memory run at less than the cpu fsb set it to 4:3 in this case it works out like this, fsb is 150 divided by 4 = 37.5 times 3 = 112mhz memory speed
I have a 1.6 now but I have a 1.6a on the way, it wont be here until next monday though
I am REALLY hoping it will do 150mhz cpu fsb, that would be awesome to get it to 2.4ghz with 300mhz ddr memory speed