Lenovo ThinkStation S20 Tower Workstation - Intel QUAD CORE Xeon W3550 – Pro Computer Inc.
OFFTEK 2GB Replacement Memory RAM Upgrade for IBM-Lenovo ThinkStation S20 (4157-xxx) (DDR3-8500 - ECC) Server Memory/Workstation Memory at Amazon.com
Lenovo ThinkStation S20 Is a Worthy Successor - Digital Engineering 24/7
Lenovo S20 - Teardown, Upgrades and Benchmarks - YouTube
CMS 4GB (1X4GB) DDR3 10600 1333MHZ ECC Non Registered DIMM Memory Ram Upgrade Compatible with Lenovo® Thinkstation S20 (X58) 4105, 4157, 4217 Series for Server Only - B124 at Amazon.com
Arch Memory 4GB 240-Pin DDR3 1333 MHz ECC UDIMM RAM for Lenovo ThinkStation S20 4157 Series at Amazon.com
Arch Memory 4GB 240-Pin DDR3 1333 MHz ECC UDIMM RAM for Lenovo ThinkStation S20 4157 Series at Amazon.com