Well, first, it is the later generation K 6 2+ and it has no problem with stability at all... I started updating with the latest bios from Soyo then set up with 450mz then 500mhz then 550mhz... never crash... not even one time. The onlything is it can't stand 600mhz. This is much better than Intel P I 2.5X100mhz. I am pretty happy but would be more please if I can make it to 600mhz. Anyhow I know I can not have everything I want. After this first AMD, I will have another Tbird soon. Bravo AMD... I never use AMD before.