Stable reliable compatible valueselect memory is tested to corsairs tough standards and is stable reliable and compatible with virtually all major notebook and netbook pcs back by a limited lifetime warranty warranty lifetime size 4gb kit 1 x 4gb performance profile none fan included no heat spreader acirceurordquo memory configuration sodimm memory type ddr3l package memory pin 204 package memory format sodimm tested voltage 135 spd voltage 135 speed rating pc