I installed an AMD Phenom X4 9850 on my Gigabyte GA-M57SLI-S4. According to Gigabyte's website that board will support that processor. So I installed the processor and booted up, the fans started turning and continued turning, but the screen just stayed black with no beeps or anything. I decided the processor must be faulty or something since my computer was working fine with the old processor, so I put the old one back in and RMA'd the new one to get a replacement. Upon putting the old CPU back in the computer still works fine. Today I got the replacement and installed it and I have the same problem. Is Gigabyte lying when they say my board will support the new processor, am I completely unaware of something I'm doing wrong, or am I just unlucky and getting bad processors? Any help would be appreciated before I send it back again and stick with my old processor. Thank you in advance.