At first i'd bought the vengance memory with the high coolers but due to having the Mugen 2 Rev B cooler fitted i realised i hadn't much overhead clearance in the RAM slots so i had to go for these LP (Low Profile) versions. They work perfect, performance is great and cooling is not an issue even though they're 1600 Mhz @ 1.5v. Well recnmennded and their low profile great for system builders og high end machines. Their profile is under 30mm compared to the ones with the high coolers which reach over 54mm, lesson here, check your clearance if your memory slots are obstructed by an aftermarket cooler. Been using them six months now and never a glitch or blue screen in sight.