I knew I wanted at least 16GB of memory in this system. I could have taken my 2x16GB Radeon Gamer Series RAM from my 8350 system, but decided just to buy an extra 8GB to pair with an unused 2x4GB set I already had. The Gigabyte 990FXA-UD5 supports up to 1866mhz RAM anyways or up to 2000mhz over clocked.
I figured that 4x4GB 1866mhz memory would be enough since my GPU will do al the heavy lifting.
RAM Install with help from Megaman, Optimus Prime, and Megazord video here:
AMD Performance Series Radeon RAM
So far in my build:
-XFX Radeon R9 295X2 GPU
-AMD FX-9590 Processor w/ Liquid Cooling System
-Fractal Design Core 3300 Computer Case
-Gigabyte 990FXA-UD5 Motherboard
-AMD Radeon R7 480GB Solid State Drive
-Western Digital Blue 1TB Hard Disk Drive