ikes9711 :
This depends on what are the other parts in the build. If you have an APU you would want the 2400mhz ram but if you have a discreet GPU get the 16gb
CPU: AMD FX-6300 3.5GHz 6-Core Processor
Motherboard: Asus M5A97 R2.0 ATX AM3+ Motherboard
Storage: Seagate Barracuda 2TB 3.5" 7200RPM Internal Hard Drive
Video Card: Gigabyte Radeon R9 280X 3GB Video Card)
Case: BitFenix Shinobi ATX Mid Tower Case
Power Supply: EVGA 600B 600W 80+ Bronze Certified ATX Power Supply
Optical Drive: Lite-On iHAS124-04 DVD/CD Writer
Monitor: Hannspree HE225DPB 21.5" Monitor
Monitor: AOC i2367Fh 60Hz 23.0" Monitor
Sound Card: Asus Xonar DS 24-bit 192 KHz Sound Card
Speakers: Logitech Z323 30W 2.1ch Speakers