Ok, I want to oc my fsb on the athlon. How high do you think my pc 2100 can go? I have 2 sticks of Kingston ValueRam. Right now I have my fsb at 145. Is memtest86 a good way of checking the ram over clock? Right now my settings are at 13 x 145, and I am sure I can go higher, but just need a moderate overclock. I am just curious, how high can some of your ddr 266's go? Also, what is better for overall system performance, upping the fsb or the multiplyer? Thank you, and sorry for all the questions!