I am at my wits end trying to figure out why only 16 GB of RAM is usable out of 32 GB installed. I believe initially when I purchased both the motherboard and RAM all 32 GB was available. It also only shows my RAM as being single as opposed to double. From what I understand the actual memory is not SINGLE or DOUBLE. All four modules are the same make, model, and size. I have rearranged the four modules and made sure they are securely installed. I thought purchasing new RAM would solve the problem. I checked my BIOS and I am not able to make any changes. Please help!
Motherboard:
GIGABYTE GA-990FXA-UD3 R5 (rev. 1.0) AM3+/AM3 AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard
Intial RAM:
Corsair Vengeance Pro Series 16GB (2x8GB) DDR3 1866 MHZ (PC3 15000) Desktop Memory
New RAM:
Corsair CMZ8GX3M1A1600C10 Vengeance 8GB (1x8GB) DDR3 1600 MHz (PC3 12800) Desktop Memory 1.5V
Motherboard:
GIGABYTE GA-990FXA-UD3 R5 (rev. 1.0) AM3+/AM3 AMD 990FX SATA 6Gb/s USB 3.0 ATX AMD Motherboard
Intial RAM:
Corsair Vengeance Pro Series 16GB (2x8GB) DDR3 1866 MHZ (PC3 15000) Desktop Memory
New RAM:
Corsair CMZ8GX3M1A1600C10 Vengeance 8GB (1x8GB) DDR3 1600 MHz (PC3 12800) Desktop Memory 1.5V