{"title":"Memory \/ RAM","description":"\u003cp\u003eTech Seller USA supplies server memory and workstation RAM - DDR5, DDR4 and DDR3 ECC RDIMM, LRDIMM and UDIMM modules from Samsung, Micron, Kingston, Crucial, HPE and Dell. Genuine OEM modules, tested, available as single sticks or matched kits for full-server population.\u003c\/p\u003e\n\u003ch2\u003eRDIMM vs LRDIMM vs UDIMM\u003c\/h2\u003e\n\u003cp\u003eRegistered DIMMs (RDIMM) buffer address and command signals, which lets a server address far more memory than unbuffered modules allow, and they are what most rack servers require. Load-reduced DIMMs (LRDIMM) buffer the data lines as well, enabling the highest capacities per channel for memory-heavy virtualisation and in-memory database hosts. Unbuffered DIMMs (UDIMM) are used in workstations and entry servers. These types cannot be mixed within a server, and installing the wrong one usually means the system will not POST at all.\u003c\/p\u003e\n\u003ch2\u003eECC and Why Servers Require It\u003c\/h2\u003e\n\u003cp\u003eError-correcting code memory detects and repairs single-bit errors before they reach the operating system. On a workstation a memory error causes a crash; on a database or virtualisation host it can cause silent data corruption that goes unnoticed for weeks. Every production server platform requires ECC memory, and consumer modules will not work in them.\u003c\/p\u003e\n\u003ch2\u003ePopulation Rules and Compatibility\u003c\/h2\u003e\n\u003cp\u003eMemory performance depends on populating channels evenly and respecting the ranks-per-channel limits of your CPU generation - a server filled with the correct total capacity in the wrong slots will run at a lower speed. We list modules by OEM part number and can confirm compatibility against your specific server model. Pair a memory upgrade with matching \u003ca href=\"\/collections\/processors\"\u003eserver processors\u003c\/a\u003e for a verified build.\u003c\/p\u003e\n\u003ch2\u003eMemory Buying Guides\u003c\/h2\u003e\n\u003cp\u003eOur technical guides cover the decisions in more detail: \u003ca href=\"\/blogs\/guides\/ecc-vs-non-ecc-memory-explained\"\u003eECC vs non-ECC memory\u003c\/a\u003e explains what ECC actually protects against and where it is unnecessary; \u003ca href=\"\/blogs\/guides\/rdimm-vs-udimm-vs-lrdimm-server-memory\"\u003eRDIMM vs UDIMM vs LRDIMM\u003c\/a\u003e covers register types, memory ranks and why population order affects bandwidth; and \u003ca href=\"\/blogs\/guides\/ddr4-vs-ddr5-server-memory-explained\"\u003eDDR4 vs DDR5\u003c\/a\u003e explains what changed between generations and why DDR5 on-die ECC is not a substitute for ECC memory.\u003c\/p\u003e","products":[{"product_id":"840757-091-hpe-16gb-pc4-21300-ddr4-2666-ecc-registered-server-memory-module","title":"840757-091 - HPE 16GB PC4-21300 DDR4-2666 ECC Registered Server Memory Module","description":"\u003cdiv class=\"tsu-product-description\"\u003e\n\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThis is a 16 GB DDR4-2666 registered ECC server memory module in the standard 288-pin RDIMM form factor. It is an enterprise-class memory upgrade intended for server platforms that require registered, error-correcting memory for sustained multi-user and virtualized workloads. Tech Seller USA supplies this part in tested and verified refurbished condition, for single units or volume orders.\u003c\/p\u003e\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cp\u003eThe module provides 16 GB of capacity as a single 16 GB DIMM built to the DDR4-2666 (PC4-21300V-R) registered specification. It uses a single rank x4 (1Rx4) organization with ECC registered error correction on a 288-pin RDIMM form factor.\u003c\/p\u003e\n\u003ch3\u003eWhat's Included \/ Condition\u003c\/h3\u003e\n\u003cp\u003eEach 840757-091 ships in refurbished condition, function-tested prior to shipment, and covered by our standard 30-day warranty. For same-day dispatch, contact Sarah Jane at sarah.jane@techsellerusa.com.\u003c\/p\u003e\n\u003ch3\u003eCompatibility \u0026amp; Use Case\u003c\/h3\u003e\n\u003cp\u003eIntended for HPE ProLiant Gen10 class servers and other enterprise platforms that accept DDR4-2666 registered ECC DIMMs. Registered ECC memory is not interchangeable with desktop or unbuffered DDR4 modules, so the host board must list RDIMM support. Typical deployments include virtualization hosts, database servers, and application and file servers where memory error correction is required.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"HPE","offers":[{"title":"Default Title","offer_id":49320311586986,"sku":"840757-091","price":242.25,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/9304\/3882\/files\/1AoZ2W2lhJFlXyAG_1XKl-XYawqVyDvqv_w1600.jpg?v=1790277460"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0708\/9304\/3882\/collections\/RAM.jpg?v=1781124001","url":"https:\/\/techsellerusa.com\/collections\/memory\/subcategory-server-memory.oembed","provider":"Tech Seller USA","version":"1.0","type":"link"}