Well I have quad channel 1866 DDR3 @ 1685 mhz. If i try to go higher, no matter what it wont post with this overclock. Ive had this ram @ 1996 on stock volts on another X79 board. AIDA64 Extreme Cache benchmark gives me 62.5ns for response time. Read is 45040 mb/s Write is 48352 mb/s Copy 41807 mb/s Im on z107 DDR4 3200 mhz dual channel performance with X79 quad channel DDR3. Game is on a 512GB 550mb read/write SSD. Game runs 40-60fps @ 2560x1080 most of the time. 290x is overclocked to 1130/1500 with an AIO.