These Kingston memory modules are designed specifically for IBM products.
Kingston 2 GB Memory - KTM5780/2G Part #:KTM5780/2G
Memory, 2 GB (2 x 1 GB), FB-DIMM, DDR II, 667 MHz, fully buffered, designed for the following systems: IBM System x3500 (7977-xxx); IBM System x3550 (7978-xxx); IBM System x3650 (7979-xxx)
Kingston engineers each system-specific desktop memory module to meet the exact specification requirements set by the manufacturer. To guarantee maximum performance, each module features design controls that regulate timing and optimize signal integrity. Now you can run multiple programs simultaneously without sacrificing stability!
Providing optimum performance and functionality, Kingston's system-specific notebook memory modules are designed using the most reliable and respected components in the industry. The easiest and best way to speed up your computer is by upgrading memory with a Kingston module. You'll get quality memory and superior performance at a better price.