Yesterday I bought some of this Samsung ram and spendt about 2 hours or so wrestling with the Samsung 2x4GB low voltage 30nm kit. They really pissed me off. Not sure if I got a bad set of ram or my mb just doesn't like them. Tried as high as CAS 11@2133mhz with voltage ranging from 1.5v to 1.67v and no matter what voltage I set it at I couldn't boot into it. I was using the same settings that I run my set of G.SKILL Ripjaws Z Series 8GB (4 x 2GB) 240-Pin DDR3 SDRAM DDR3 2133 (PC3 17000) Desktop Memory Model F3-17000CL9Q-8GBZH. I have read so many incredible stories about the Samsung ram that I just had to try it. Part of my problem may be my MSI Z68 GD65 G3 BIOS. It has been known to be finicky. I'm kind of glad the Samsung didn't work out because I was already in the process of selling my G.Skill at a loss. I really thought the Samsung would scale better in over clocking and performance.