HP 595095-001 - 4GB, 1333MHz, PC3-10600R-9, DDR3, dual-rank x4, 1.50V, registered dual in-line memory module (RDIMM) Sale $20.00 Retail $49.00
HP 506263-001 - 4GB, 204-pin, DDR3 PC3-8500, 1600MHz, Small Outline Dual In-Line memory module Retail