{"product_id":"cms-64gb-4x16gb-ddr4-21300-2666mhz-ecc-registered-dimm-workstation","title":"CMS 64GB (4x16GB) DDR4 21300 2666MHz ECC Registered DIMM - Workstation","description":"\u003cp\u003eIn this review of the CMS 64GB (4x16GB) DDR4 21300 kit, the bottom line is simple: it is a practical, no-nonsense memory upgrade for HP\/Compaq and compatible Xeon workstations that need dependable ECC registered modules. The reviewer found the kit most valuable for professionals running memory-sensitive workloads on supported Xeon platforms because the modules offer registered ECC protection, a matched 4-piece kit for balanced channel population, and factory-backed lifetime exchange when purchased directly. For anyone using the specified HP\/Compaq Z4 G4 or similar Xeon systems, this kit addresses capacity and stability without mystery.\u003c\/p\u003e\u003ch2\u003eKey Features\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eMatched 4-Piece Kit:\u003c\/strong\u003e Four identical 16GB modules provide balanced population across memory channels for predictable multi-socket performance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eECC Registered DIMM:\u003c\/strong\u003e Error-correcting, registered memory reduces the risk of data corruption for workstation workloads that demand stability.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e2666 MHz Speed:\u003c\/strong\u003e DDR4-21300 at 2666 MHz gives a good balance of latency and throughput for Xeon W and similar server-class CPUs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eCompatibility Guarantee:\u003c\/strong\u003e Computer Memory Solutions guarantees compatibility with the models listed in the description, reducing installation uncertainty.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eLifetime Warranty:\u003c\/strong\u003e A limited lifetime warranty or lifetime exchange\/repair is included when bought directly, offering long-term protection against manufacturing defects.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eWho It's For\u003c\/h2\u003e\u003cp\u003eThis kit is aimed at workstation users and small server builders who run HP\/Compaq Z4 G4 platforms or other systems that explicitly support ECC Registered DIMM modules and need 64GB of protected memory. It is especially well suited to professionals using Xeon W and second-generation Xeon Scalable processors, where registered RDIMM support and capacity scaling matter for rendering, simulation, or large dataset work.\u003c\/p\u003e\u003cp\u003eUsers who should look elsewhere include owners of consumer motherboards that only accept unbuffered UDIMM memory or those who need non-ECC gaming memory. Also note that mixing memory types (RDIMM and LRDIMM) in the same system is not supported, so buyers needing mixed-module flexibility should choose a different solution.\u003c\/p\u003e\u003ch2\u003ePros \u0026amp; Cons\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003ePros\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eProvides error-correcting registered memory for improved system reliability under heavy workloads.\u003c\/li\u003e\n\u003cli\u003eMatched 4x16GB configuration simplifies channel population and helps achieve advertised capacity and performance.\u003c\/li\u003e\n\u003cli\u003e2666 MHz DDR4 speed is broadly compatible and will clock to optimal speed for supported processors.\u003c\/li\u003e\n\u003cli\u003eLimited lifetime warranty or lifetime exchange\/repair by the manufacturer when purchased directly.\u003c\/li\u003e\n\u003c\/ul\u003e\u003cp\u003e\u003cstrong\u003eCons\u003c\/strong\u003e\u003c\/p\u003e\u003cul\u003e\n\u003cli\u003eRequires specific server\/workstation CPUs and chipsets; 64GB RDIMM use is limited to supported Xeon generations.\u003c\/li\u003e\n\u003cli\u003eAppearance may vary and the product image is for reference only, so cooling or heatspreader style may differ from expectations.\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003ctable\u003e\n\u003ctr\u003e\n\u003ctd\u003eCapacity\u003c\/td\u003e\n\u003ctd\u003e64 GB (4 x 16 GB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory Type\u003c\/td\u003e\n\u003ctd\u003eECC Registered DIMM (RDIMM)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSpeed\u003c\/td\u003e\n\u003ctd\u003eDDR4-21300, 2666 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eForm Factor\u003c\/td\u003e\n\u003ctd\u003e288-pin DIMM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eVoltage\u003c\/td\u003e\n\u003ctd\u003e1.2 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTimings\u003c\/td\u003e\n\u003ctd\u003eCL19\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCompatibility Notes\u003c\/td\u003e\n\u003ctd\u003eCompatible with specified HP\/Compaq workstations and Xeon platforms; 64GB RDIMM only on certain Xeon generations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\u003ch2\u003eOur Verdict\u003c\/h2\u003e\u003cp\u003eThe CMS 64GB (4x16GB) DDR4 ECC Registered kit is a solid value for workstation users who require ECC protection and matched modules for reliable multi-channel operation. It is particularly compelling for supported HP\/Compaq Z4 G4 systems and Xeon configurations where verified compatibility and a lifetime warranty matter; buyers must ensure their CPU and motherboard explicitly support RDIMM before purchasing.\u003c\/p\u003e\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003cp\u003e\u003cstrong\u003eWill this memory work in a single-CPU system?\u003c\/strong\u003e\u003cbr\u003eYes, but if only one processor is installed your motherboard may allow fewer populated DIMM sockets; check your system manual for supported population rules.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eCan these modules be mixed with LRDIMM or UDIMM?\u003c\/strong\u003e\u003cbr\u003eNo, modules of different memory types cannot be mixed in the same system; use only RDIMM modules in RDIMM-supported configurations.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes faster memory run at full speed?\u003c\/strong\u003e\u003cbr\u003eFaster memory will clock down to the optimal speed supported by the installed processor and platform, so modules rated above platform limits will run at the supported frequency.\u003c\/p\u003e","brand":"Computer Memory Solutions","offers":[{"title":"Default Title","offer_id":48184885608667,"sku":"B08CL46NKM","price":149.5,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0724\/1043\/1707\/files\/71kGKmEHrJL._AC_SL1500_a1fa20f7-666d-419e-8178-858c181dd2c4.jpg?v=1769696778","url":"https:\/\/gearmusthave.com\/products\/cms-64gb-4x16gb-ddr4-21300-2666mhz-ecc-registered-dimm-workstation","provider":"GearMustHave","version":"1.0","type":"link"}