Here is the story. I just changed my motherboard from a kt7 to a kt7a and from a 1.1Ghz to a 1.3Ghz. I connected everything fine. I'm at the point of formating the harddisk through the windows 2000 setup and it freezes up on 0%. I have two 40GB WD harddrives. Now, my reason for switching out Mobo's and CPU's is that when i bought a new heatsinker for the 1.1Ghz, I accidently scratched the CPU and motherboard when trying to get the clips down. I began getting freeze ups, and I thought it had to do with overheating and the scratches. So now, I thought my primary harddisk was bad because it would not format. So what I did was, I disconnected the cable to both harddrives and placed it just on the second harddrive and made that the primary. As the PC boots up, it doesn't detect the harddrive on the first try, but on the second it detects it, but right after I get a Master Harddisk fail message. Which Is what I got trying it with the first harddrive thinking that was bad. So I figure something else is the problem, because both drives can't be bad all of a sudden. I made sure the jumpers on the drives were set to primary when I tried both seperately. Now I'm thinking it's a bad power supply. I was thinking it's not getting enough power. I have a 300w power supply. I was thinking since i have a voodoo 5 agp (which takes up a lot of power I heard), I have 2 extra fans (1 bay and 1 PCI). Does anyone have any ideas? I'm about to buy a 400w PS today.