G. Skill 4GB (2 G Bx 2) DDR2 1066 M Hz Memory Every G.SKILL performance memory kit is 100% tested with G.SKILLs rigorous testing process. It ensures maximum stability, performance & compatibility. It is one of the best choices for upgrading your PC & boosting the systems performance to a whole new level. Series Performance Memory Type DDR2 Capacity 4GB (2 G Bx 2) Multi-Channel Kit Dual Channel Kit Tested Speed 1066 M Hz Tested Latency 5-5-5-15-2N Tested Voltage 2.0v~2.1v Registered/ Unbuffered Unbuffered Error Checking Non-ECC SPD Speed 800 M Hz SPD Voltage 1.80v Fan lncluded No height 32 mm / 1.26 inch Warranty Lifetime