Swap out your power supply. Also check to see if you have a screw or standoff out of place between the MB and the backplate. That can cause a power cutoff too.
I used a floppy. I dont have a USB drive. It might be worthwhile updating to the latest Bios ( ver.1.7 ) You could also try a different Harddrive. Mabey your new one has a problem. Also check all your connections. You could have a loose one somewhere.
I have the same MB as you. Same ram. E8400 stock.I had to update the Bios to ver. 1.6 for it to run. I also increased the ram voltage to 1.9. Beyond that, I dont know what to tell you. Everything runs great. Sorry I couldn't help more.
Hi. I'm not an expert but I would look at your ram. Either try one stick at a time or a known good stick. I recently bought the exact same ram from Newegg and it was DOA. Good luck.
I have the same MB as you and an 8400 CPU. It works fine, no problems. Are you sure the Bios update took? The MB comes with Bios ver. 1.4. Using Liveupdate I brought it to ver 1.6., installed the CPU and it worked without problems. Did you check your Bios or CPU-Z to see if in fact you have Ver...
I have the MSI P6N SLI Platinum. It came with Bios ver. 1.4 . I updated it to 1.6. Then I bought the 8400, and it worked fine.No problems. I dont overclock (I dont know how),so I dont know about that.
PS: You do need Ver. 1.6 to run 8400.