I have a FX 8350 installed in a GA-990FXA-UD3 motherboard, revision 1.1. 16 GB G.SKILL Ripjaws X Series 16GB (4 x 4GB) 240-Pin DDR3 SDRAM DDR3 1866 (PC3 14900) Desktop Memory Model F3-14900CL9Q-16GBXL memory installed. All memory modules test good but modules installed in slots 1 and 3 report 2 GB instead of 4. Problem started about one month after installing new CPU. Gigabyte says check with old CPU, it was sold, any ideas here.