A-TECH 4GB KIT (2 x 2GB) For IBM Lenovo ThinkCentre M58p 7483 7484-xxx 9964 9965-xxx M70e 0806 0809 0822 0829 0830 0832 0833 0842 0843. DIMM DDR3 NON-ECC PC3-8500 1066MHz RAM Memory. Genuine Brand. 4GB KIT (2 x 2GB) 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 IBM Lenovo ThinkCentre. (See Compatibility List Below)