GA-EP45-DS3L continually booting

Any beeps? I think it could also be the power supply, or due to surges. You're using a surge protector? Have you tried the system on another wall socket?

Have you just added a new USB device? Unplug it! Your whole problem may vanish; GB MOBOs are 'picky' about certain USB devices, and their most common response is the dreaded 'reboot loop'...

Still a mystery, but the problem seemed to have solved itself. I unplugged everything to set the system up on a workbench, and when I reconnected everything, it worked like a charm. Go figure. to answer previous suggestions, I hadn't added any new USB devices, and as far as the power supply, it seems OK - like I said, it's working now. Anyway, thanks for the responses, and I'll wait and see if it does it again.

If possible, just plug USB devices in one at a time and use for a day - with a couple of cold restarts - before plugging in another. If your problem was one of the devices, this might help isololate which one. T

his would be pure speculation but, if not the above, maybe it was a loose, partial connection on one of the devices - or maybe (remote tho) even the process of moving it "fixed" a loose internal connection. Or if it is on a different circuit or socket that might have affected it (again remote), Just some things to consider if the problem reoccurs.