4GB STICK For Asus G Series G46VW G53SW (Dual Core) (2 Slots) G53SW (Quad Core) (4 Slots) G53SX G55VW G74SX (Dual Core) (2 Slots) G74SX (Quad Core) (4 Slots) G750JW G750JX G75VW G75VX. SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz RAM Memory. Genuine A-Tech Brand. 4GB STICK SO-DIMM DDR3 NON-ECC PC3-12800 1600MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Asus G Series. (See Compatibility List Below)