Building the GEARBOX: Take on Borderlands 2 With the Ultimate $2500 Gaming PC
There are two different types of RAM on the market: commodity RAM and performance RAM. The commodity stuff is like optical drives, a dime a dozen and little need to think too much about which to buy.
Performance RAM is a whole different animal, and something an overclocker needs to pay special attention to because commodity RAM can't generally run stable beyond their rated speed. These sticks from Corsair are rated at 1600MHz, but leave plenty of room to run higher for those who wish to push it.