My apologies! I have no clue why I didn't see that I had a PM! My 1KW-SR was never hooked up to the R3E, I had it on my speedbench with a Corsair HX-1000 until my Corsair AX-1200 arrived. My 1KW-SR was powering my Striker II Extreme mobo, and it never hiccuped with that rig.