My latest workstation is an all Supermicro build based around a
732 Mid Tower Chassis (PWS-903-PQ power supply), X9DRi-F motherboard, 2x E5-2670 (SR0H8), 8x 8GB Kingston PC3-12800R, 2x Supermicro SNK-P0050AP4 coolers. I added another 120mm fan to the front of the chassis, and 2012R2 is running from a 120GB Kingston Hyper-X SSD.
Right now, video is onboard, but I'll soon be dropping in something suitable.
I posted CPU details in post #29 of this thread. The motherboard is actually an X9DRi-F not the X9DR3-F posted in the screenshots (the BIOS between the two is common).
BIOS settings for CPU Power Management is "Energy Efficient"
Fan Speed Mode (verified from IPMIView) is Standard
2012R2 Power settings at "balanced"
Per my Kill-A-Watt, the system idles at 76W.