Summary: I bought these to fit my MSI motherboard, and the only issue I had was the mobo ran it up at 1600 Mhz, the RAM does not know the difference on its own. You have to go through the BIOS and manually change the MHz to 2133 :) Other than that, my computer is lightning fast!
Summary: I bought this set for my gaming computer build and never turned back. I like the blue as it matches my blue montage i got going on. the speed itself ill be honest i have no idea yet. I have yet to max these things out as far as i could tell.
Summary: I just installed the kit on a Z68/gen3 motherboard, the sticks are currently clocked at 9-11-10-28 at 1.635v and they've past with all the stress tests without any issues.
I tried taking the clocks a little lower but 9-11-9-28 seemed a little unstable at 1.65v and did not want to increase the voltage higher.
So at the bottom point, they're decent 2133mHz sticks, note that I haven't OC'd them to 2400 just yet.