I wouldn't reccommend the Corsair kit since they stopped putting Micron D9 chips in them a looong time ago and some even display Memtest errors or motherboard incompatibilities...Corsair fans, don't jump at my throat, it's the truth...
LOL....interesting information. But it's wrong. FWIW, it helps to post a bit of proof when you post things like this. Micron is no longer king of the ICs and especially in the 128 gigabit die. 64mb D9s are pretty much gone. And, you can't make a 2gb module with a 64mb ICs in a standard module configuration. The 128mb Microns will not clock nearly as well as the PSC ICs that are in most of the good 2 x 2gb kits these days.
In this case for gaming I'd suggest the 2 x 2gb kit.