I just installed 16Gb of G.Skill F3-1600C9D-16GRSL ram into my 2013 27" iMac. Ram is 1.35V with timing at 9-9-9-28. Everything is working fine. Just wanted to confirm that there is no issues with this ram. I've always had success with G.Skill in my PC builds and with upgrades to other Mac's (purchased 8Gb of basic 1600mhz G.Skill ram for my wife's 2012 Mac Mini). The timings and price made me go for this versus OWC or Crucial. New Egg has a 10% off promo code until 10/31 on this ram: http://www.newegg.com/Product/Product.aspx?Item=N82E16820231705 Thanks!