A-Tech 8GB KIT 2 x 4GB Gigabyte GA GA-EX58-UD3R-SLI Rev 1.0 GA-EX58-UD4 GA-EX58-UD4P GA-EX58-UD5 GA-G41M-Combo GA-G41MT-D3 GA-G41MT-D3V GA-G41MT-ES2L DIMM DDR3 NON-ECC PC3-8500 1066MHz RAM Memory 8GB KIT (2 x 4GB) DIMM DDR3 NON-ECC PC3-8500 1066MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Gigabyte Gigabyte GA. (See Compatibility List Below)