Hi, i finally managed to assemble everything, got a sabertooth 990fx rev2.0, amazing mobo it appears. I pushed easily to 4.5 at "stock" voltages (1.356), but since ambient temp it's really hot i downclocked a bit (4.4). I'm wondering if i can undervolt. Got my ram running at 2133Mhz (9-9-11-27) with 1.55V. Barely stress tested with 1/2 hour of blend mode prime95, stopped because i hit 67C socket temp. Anyway CPU temp stays around 52/54 C. I'm using A Nh-u 12s push pull. In your opinion are those temp safe enough to run a full prime test?