I have a pc with a AMD 380Mhz. K6-r2 3d now, 64megs, System Board V75M-UMA, SiS 5595. I want to upgrade the CPU, what is the highest I can go in AMD CPU's? Is it possible for K6-3 and if I can what is the highest I'll get out of it? Also will I need to upgrade my Bios for ether upgrades?