Main Questions: What is causing the Hyper Transport Sync Flood? What is causing the BIOS Recovery to start? Is it a fault with one of my components, or do they just not agree with each other? Hey everyone, I recently just installed a new graphics card into my PC. Unfortunately, I can't run it at the moment, so I can't get fully accurate specs. MSI 770-G45 Mobo 10GB RAM - 1333MHz DDR3: 3x 2GB Corsair Modules 1x 4GB XMS3 Corsair Module Old graphics card: Intel Radeon 5570 New graphic card: Intel Sapphire HD 6770 Processor: AMD ADX250OCGMBOX Athlon II X2 250 - 3.0 GHz AM3 CPU I've had my mobo overclocked all of the time with the old card for over a year with no problems. I've underclocked it for now to see if that will make a difference. The new graphics card requires a connection to the PSU, which the previous one didn't, and the reason that I suspect it's the graphics card at fault is because my monitor started to flicker before going fully white and crashing. I've investigated a little bit and have come to the conclusion that my graphics card is overheating (after 10 minutes of use?), and when I restart my PC, I get a black screen with all of my PC specs and a message saying: A Hyper Transport sync flood error occured on last boot. Press F1 to Resume I've asked a friend, but want another opinion on this. He said it's because of lack of cooling within my PC. What can I do to fix this? EDIT: Every time I restart now, It comes up with this message: BIOS recovery requested. Starting BIOS Recovery... Please insery USB flash Disk with BIOS file. Checking for USB device... EDIT: Fixed. Had to reset CMOS, then switch back to my old card. Reconfiguring my mobo now EDIT: Just connected everything back up, with the old card. Getting the BIOS problem again. EDIT: After about an hour of being shut down, it's decided to work again. However, when loading everything up, a list of all my components and peripherals were shown through a system message, which it's never done before. EDIT: Reconnected the case fan and the BIOS recovery message occurred again. After another hour or so of being turned off, the PC started normally and hasn't crashed.