A-TECH 8GB KIT (2 x 4GB) Toshiba Portege R835-P56X R835-P70 R835-P75 R835-P81 R835-P83 R835-P84 R835-P86 R835-P88 R835-P89 R835-P92 SO-DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory Genuine Brand 8GB KIT (2 x 4GB) SO-DIMM DDR3 NON-ECC PC3-10600 1333MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For Toshiba Portege. (See Compatibility List Below)