A-Tech 32GB Replacement for HP P07646-B21 - DDR4 3200MHz PC4-25600 ECC Registered RDIMM 2Rx4 1.2V - Single Server Memory RAM Stick (P07646-B21-ATC) at Amazon.com
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Silicon Power DDR4 3200MHz (PC4-25600) 8GB-32GB Single Pack 1.2V Deskt – SP Silicon Power