{"product_id":"p64705-b21-hpe-16gb-ddr5-5600-ecc-server-memory","title":"P64705-B21 - HPE 16GB DDR5-5600 ECC Registered Memory Module (Refurbished)","description":"\u003ch2 dir=\"ltr\"\u003eWhat Is the HPE P64705-B21?\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eThe P64705-B21 is HPE's 16GB DDR5-5600 memory module built for ProLiant Gen11 servers. It uses ECC Registered (RDIMM) construction in a single-rank, x8 design, running at 1.1V through the standard 288-pin form factor. HPE sells it under the DDR5 Smart Memory line. That means HPE qualifies and tests each module on its own Gen11 platforms, not just against general JEDEC specs.\u003c\/p\u003e\n\u003cp dir=\"ltr\"\u003eThis capacity suits a standard Gen11 memory upgrade or a direct replacement for a failed 16GB stick, since it matches HPE's original configuration exactly. Larger Gen11 builds often mix it with higher-capacity DIMMs across additional channels, rather than relying on 16GB modules alone.\u003c\/p\u003e\n\u003ch3 dir=\"ltr\"\u003e\u003cstrong\u003eP64705-B21 Specifications\u003c\/strong\u003e\u003c\/h3\u003e\n\u003cul dir=\"ltr\"\u003e\n\u003cli\u003e\n\u003cstrong\u003eCapacity:\u003c\/strong\u003e 16GB\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMemory type:\u003c\/strong\u003e DDR5 ECC Registered (RDIMM)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSpeed:\u003c\/strong\u003e 5600 MT\/s (PC5-44800)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCAS latency:\u003c\/strong\u003e CAS 46-45-45 (CL46)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRank and width: \u003c\/strong\u003eSingle rank, x8\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eVoltage: \u003c\/strong\u003e1.1V\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePins:\u003c\/strong\u003e 288\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eForm factor:\u003c\/strong\u003e Standard height RDIMM\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCondition:\u003c\/strong\u003e Refurbished, tested, and verified functional\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2 dir=\"ltr\"\u003eWhich Servers Support the P64705-B21?\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eThis module fits HPE ProLiant DL360, DL380, and ML350 Gen11 servers, plus other Gen11 platforms built around DDR5, such as the DL320 Gen11 and ML110 Gen11. One detail is easy to miss: DDR5-5600 speed only runs at its full rate with 5th Gen Intel Xeon Scalable processors. Pair this module with a 4th Gen Xeon Scalable CPU on the same Gen11 board, and it still works. The memory controller just settles for a lower speed instead. Check your processor generation, not just the server model, before you count on 5600 MT\/s.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003eRefurbished, Tested, and Ready to Ship\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eCPU Republic sells the P64705-B21 as refurbished, not new. We pull, clean, and test each module on working server hardware before it's listed, using genuine HPE-qualified chips rather than a generic substitute. Every order carries a 30-day warranty, so a faulty module is covered if one slips through.\u003c\/p\u003e\n\u003ch2 dir=\"ltr\"\u003eEquivalent HPE Part Numbers\u003c\/h2\u003e\n\u003cp dir=\"ltr\"\u003eP64705-B21 is HPE's option part number, the one tied to a standard memory upgrade order. Matching a number from a service ticket or PartSurfer instead? Look for spare part number P65253-001 or assembly number P53624-0A1. All three point to identical hardware.\u003c\/p\u003e\n\u003ch3\u003eHow Many P64705-B21 Modules Fit in a DL360 or DL380 Gen11?\u003c\/h3\u003e\n\u003cp dir=\"ltr\"\u003eMost DL360 and DL380 Gen11 configurations offer 16 DIMM slots split across two processors, though the exact count depends on your build. Confirm the slot layout for your specific server before filling every slot.\u003c\/p\u003e","brand":"HP","offers":[{"title":"Default Title","offer_id":62828315083123,"sku":"P64705-B21","price":750.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0992\/9546\/1747\/files\/P64705-B21.jpg?v=1778312632","url":"https:\/\/cpurepublic.com\/products\/p64705-b21-hpe-16gb-ddr5-5600-ecc-server-memory","provider":"CPU Republic LLC","version":"1.0","type":"link"}