2GB KIT (2 x 1GB) For IBM-Lenovo IBM-Lenovo ThinkCentre E51 (8467-xxx) E51 (8468-xxx) E51 (8712-xxx) E51 (8713-xxx) E51 (8714-xxx) E51 (8715-xxx) (8141-xxx) (8143-xxx) (8144-xxx) (8185-xxx) (8187-xxx) (8189-xxx) M50 (8128-xxx) M50 (8192-xxx) M50 (8430-xxx) M50 (8431-xxx) M50E (8179-xxx) M51 (8095-xxx) M51 (8096-xxx) M51 (8097-xxx) M51 (8141-xxx) M51 (8142-xxx) M51 (8143-xxx) M51 (8144-xxx) M51 (8145-xxx). DIMM DDR NON-ECC PC3200 400MHz RAM Memory. Genuine A-Tech Brand. 2GB KIT (2 x 1GB) DIMM DDR NON-ECC PC3200 400MHz RAM Memory Genuine A-Tech Memory Lifetime Warranty Toll Free Technical Support 1-866-557-4527 Designed For IBM-Lenovo IBM-Lenovo ThinkCentre. (See Compatibility List Below)