C1 = Detect memory, Auto-detection of DRAM size, type and ECC, Auto-detection of L2 cache
Turn off your system, unplug the psu cord from the wall outlet or the back of the psu.
Remove the mobo battery and jumper the Clear_CMOS pins for one hour or longer.
Remove all memory modules then clean and inspect all memory slots with compressed air.
Carefully clean each of the memory module's electrical contacts with a clean rubber eraser.
When you are ready to reboot, see if you can boot with only one module installed and see if you can boot into the bios to load Optimized Bios Defaults.
Any recent changes to your system?
Can you borrow and test with another power supply?