4GB KIT (2 x 2GB) For Gigabyte GA-M Series GA-M750SLI-DS4 (Rev 1.0) GA-M78SM-S2H (Rev 1.0) GA-M85M-US2H GA-MA74GM-S2 (rev. 1.x) GA-MA74GM-S2H GA-MA74GM-S2H (Rev 1.0) GA-MA780G-UD3H GA-MA785GM-US2H GA-MA785GPM-UD2H GA-MA785G-UD3H GA-MA78G-DS3H (Rev 1.0) GA-MA78G-DS3HP (Rev 2.0) GA-MA78GM-DS2H GA-MA78GM-DS2H (Rev 1.0) GA-MA78GM-DS2HP (Rev. 2.1) GA-MA78GM-S2H (Rev.1.0) GA-MA78GM-S2H (Rev.1.1). DIMM DDR2 NON-ECC PC2-6400 800MHz RAM Memory. Genuine A-Tech Brand. 4GB KIT (2 x 2GB) DIMM DDR2 NON-ECC PC2-6400 800MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Gigabyte GA-M Series. (See Compatibility List Below)