Kingston HyperX Savage 4GB 2133MHz DDR3 Non-ECC CL11 DIMM XMP (HX321C11SR/4) Fast - top-performing modules available with low-profile heat spreader Unique - red, asymmetrical heat spreader sets new trends for PC builds Quality - aluminum die-cast heat spreader with a diamond cut finish Design - low profile to fit under oversized CPU coolers Reliable - 100-percent factory tested Guaranteed - lifetime warranty, free technical support