I have a couple of questions for you--What is you CPU temperature when it is not working too hard--I have the same CPU and I am at 113 right now--AMDs do run a little hot--check and see if your cache is enabled in the CMOS---are you using DDR memory?--also I have noticed that some video cards run better if you only install the driver and leave all the other BS software that they come with out.--I hope this helps