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Crucial 16GB Kit (8GBx2) DDR3/DDR3L 1600 MHz (PC3-12800) CL11 SODIMM 204-Pin 1.35V/1.5V Memory for Mac CT2C8G3S160BM

Running 4 8gig sticks withouth any problems.
My iMac is a 27 i5 late 2013 model that came with 8gigs of ram. It is now running 32 Gigs of this rams stable, no panics, no hangups. With windows 7 in virtual mode. and from 14 -18 open applications at the same time.
 
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