DETAILS: Kingston is the world"s largest independent memory manufacturer. In today"s performance-driven environment, memory upgrades provide an easy, economical alternative to increase system performance. Every memory product Kingston offers is designed to help you get maximum performance at the best price to you.This memory is designed for the following systems:IBM - ThinkPad R50e Celeron M 1842-xxx;IBM - ThinkPad R50p Pentium M 1832, 1833-xxx;IBM - ThinkPad R51 Celeron M 2883, 2887-xxx;IBM - ThinkPad R51 Celeron/Pentium M N887-xxx;IBM - ThinkPad R51 Pentium M 1829, 1830, 1831-xxx;IBM - ThinkPad R51 Pentium M 1836-xxx;IBM - ThinkPad R51 Pentium M 2883, 2887, 2888, 2889-xxx;IBM - ThinkPad R51 Pentium M 2894, 2895-xxx;IBM - ThinkPad T41 Pentium M 2373, 2374, 2378, 2379-xxx;IBM - ThinkPad T41p Pentium M 2373, 2374-xxx;IBM - ThinkPad T42 Pentium M 2373, 2374, 2378, 2379-xxx;IBM - ThinkPad T42p Pentium M 2373, 2374, 2378, 2379-xxx;IBM - ThinkPad X31 Pentium M 2672-xxx;IBM - ThinkPad X31 Pentium M 2884, 2885-xxx;IBM - ThinkPad X40 2371-xxx;IBM - ThinkPad X40 2372, 2382, 2386-xxx. Product Description Kingston memory - 512 MB - SO DIMM 200-pin - DDR Storage Capacity: 512 MB Upgrade Type: System specific OEM Manufacturer Equivalent Part Number: IBM 31P9832, IBM 31P9833 Technology: DDR SDRAM Form Factor: SO DIMM 200-pin Memory Speed: 333 MHz ( PC2700 ) Features: Unbuffered Manufacturer Warranty: Limited lifetime warranty ( Germany, Austria and France - 10 years ) ALTERNATE ITEM #: KTM-TP9828/512 UPC: 0740617074994