2X2GB bbse from a few different batches here http://www.xtremesystems.org/forums/showthread.php?267176-Gskill-F3-17000CL8-D
With EK block
$160 shipped everywhere
Most of Ivy-e I tested with black board regardless of low/high volts on ambient or high/low cores clock on cold can easily scale up to 2933/3000+ imc with samsung tights depending on rams.
Although not all can scale 3100+ imc air
Gotta run it cold to be sure. one of my low volts 4930K has absolute 5.85G wall with LN2.
I think most newer steppings have decent imc with good clocking rams