4GB KIT (2 x 2GB) Toshiba Satellite U Series U305-S7446 U305-S7467 U305-S7477 U400 PSU40E-02300MGE PSU44E-01D017EN PSU44U-04R01H SO-DIMM DDR2 NON-ECC PC2-6400 800MHz RAM Memory Genuine A-Tech Brand 4GB KIT (2 x 2GB) SO-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 Toshiba Satellite U Series. (See Compatibility List Below)