Need some ASUS help, please!

i7 3930k, X79 Sabertooth, 8 x 4GB DDR3 1600

Built this system today and all was well during the first hour of testing. Then, out of nowhere, the BIOS and OS only started to detect 24GB out of 32GB of installed memory.

I went back into the BIOS, and under the Tool tab at the top right, the ASUS DRAM SPD Information shows the following:



I've checked the memory, itself - I've swapped in several different kits, and the 'ABNORMAL' message still stays on C1 and C2. Switching around the sticks / changing sticks doesn't clear the error.

I've tried the usual - full clear, resetting, reseating, BIOS update, and so on. Nothing's worked, and no DDR in those slots will show up anymore.

So, any suggestions, or is the board just dead? Or, even worse, is the CPU dead? I was hoping it wasn't an IMC problem.