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CMS 16GB (2X8GB) DDR3 12800 1600MHz ECC Non Registered DIMM Memory Ram Upgrade Compatible with Dell® Poweredge T20 EccU for Server Only - B89 at Amazon.com
PowerEdge T20 4-Bay 3.5" | Dell Server | Aventis Systems
parts-quick 8GB Memory for Dell PowerEdge T20 DDR3 PC3-12800E ECC RAM Upgrade at Amazon.com