I have already asked a question of this nature in a much more quiet section of this forum, but since time is off the essence, I am bringing my woes here. I have just purchased this RAM mistakenly believing that 2600K CPU mobo took triple channel kits. Having discovered that the 2600K mobos actually take dual channel DDR3 kits, I have arranged to RMA the triple channel kit and am now about to buy this RAM. Both RAM kits are Corsair vengeance and both have similar specs, but with the Dual channel kit being rated at 1866MHz whilst the triple channel RAM is rated at 1600MHz. However, I am thinking that these kits are infact just the same thing, except sold in either twos or threes, and that the higher clock rating for the dual channel kit is simply a matter of how these RAM sticks run in dual channel configurations, whereas in a triple channel config, these stick are tested to run only at 1600MHz. If anyone knows (as oppossed to just guessing) if this is infact the case then it would prevent me from running around like a headless chicken with RMAs and repurchasing potentially the same thing but in a pack of two......and not much cheaper by the time new postage is paid. If on the otherhand I will get better performance from getting the dual channel kit rated at 1866MHz, instead of using two of the triple kit rated at 1600MHz, then obvioulsy the dual kit is the way to go.