{"product_id":"hynix-32gb-ddr5-4800-rdimm-hmcg88mebra115n","title":"Hynix 32GB 4800MHz DDR5 PC5-38400 ECC Registered CL40 288-Pin DIMM 1.1V Dual Rank x8 Memory Module - HMCG88MEBRA115N","description":"\u003cp\u003eThe SK hynix HMCG88MEBRA115N is a 32GB DDR5-4800 registered DIMM for servers. It is dual rank with x8 chips, runs at 1.1V, and has 288 pins. The label reads 32GB 2Rx8 PC5-4800B-R.\u003c\/p\u003e\n\u003ch2\u003eDDR4 to DDR5 in one table\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eFeature\u003c\/th\u003e\n\u003cth\u003eDDR4-2666 RDIMM\u003c\/th\u003e\n\u003cth\u003eThis DDR5-4800 RDIMM\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eVoltage\u003c\/th\u003e\n\u003ctd\u003e1.2V\u003c\/td\u003e\n\u003ctd\u003e1.1V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eData rate\u003c\/th\u003e\n\u003ctd\u003e2666 MT\/s\u003c\/td\u003e\n\u003ctd\u003e4800 MT\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBandwidth per module\u003c\/th\u003e\n\u003ctd\u003e21.3 GB\/s\u003c\/td\u003e\n\u003ctd\u003e38.4 GB\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eChannels per module\u003c\/th\u003e\n\u003ctd\u003e1\u003c\/td\u003e\n\u003ctd\u003e2 sub-channels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePins\u003c\/th\u003e\n\u003ctd\u003e288\u003c\/td\u003e\n\u003ctd\u003e288\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eThe pin count matches, but the key notch sits in a different place. A DDR5 module can't seat in a DDR4 slot. DDR5 modules also carry their own power management chip, which sets the 1.1V supply on the module.\u003c\/p\u003e\n\u003ch2\u003eWhat 2Rx8 and EC8 mean\u003c\/h2\u003e\n\u003cp\u003eThe 2R means two ranks. The x8 is the chip width. Each DDR5 module splits into two 32-bit sub-channels, and ECC adds 8 check bits to each one. That extra width is what the EC8 tag refers to.\u003c\/p\u003e\n\u003cp\u003eSK hynix builds the 32GB module from twenty 16Gb chips. The timing is CL40, with tRCD and tRP of 39, at the 4800 MT\/s grade.\u003c\/p\u003e\n\u003ch2\u003eThe M in the part number\u003c\/h2\u003e\n\u003cp\u003eSK hynix uses the letter after HMCG88 to name the DRAM die. The M marks the 16Gb M-die, which SK hynix lists as its first generation. The module HMCG88AEBRA115N uses A-die instead. Both are 32GB, 2Rx8, and 4800 MT\/s.\u003c\/p\u003e\n\u003ch2\u003eWhat to match\u003c\/h2\u003e\n\u003cp\u003eA server that takes this module has to support DDR5 RDIMMs. It can't share a server with unbuffered DIMMs, and a desktop PC can't use it. The server runs the module at the lower of 4800 MT\/s and the CPU limit. Sixteen modules give 512GB. Thirty-two give 1TB. Fill the channels evenly and follow your server's slot layout.\u003c\/p\u003e\n\u003ch2\u003eQuick answers\u003c\/h2\u003e\n\u003ch3\u003eIs it single or dual rank?\u003c\/h3\u003e\n\u003cp\u003eDual rank. A single-rank 32GB DDR5 module uses x4 chips and reads 1Rx4.\u003c\/p\u003e\n\u003ch3\u003eWhat temperatures does it handle?\u003c\/h3\u003e\n\u003cp\u003eSellers list an operating range of 0 to 85°C. Keep air moving across the memory slots.\u003c\/p\u003e\n\u003ch2\u003eHMCG88MEBRA115N specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eSK hynix\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePart number\u003c\/th\u003e\n\u003ctd\u003eHMCG88MEBRA115N\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCapacity\u003c\/th\u003e\n\u003ctd\u003e32GB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eType\u003c\/th\u003e\n\u003ctd\u003eDDR5 RDIMM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSpeed\u003c\/th\u003e\n\u003ctd\u003e4800 MT\/s (PC5-38400)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBandwidth\u003c\/th\u003e\n\u003ctd\u003e38.4 GB\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRank\u003c\/th\u003e\n\u003ctd\u003e2Rx8\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eTiming\u003c\/th\u003e\n\u003ctd\u003eCL40 (40-39-39)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eError check\u003c\/th\u003e\n\u003ctd\u003eECC (EC8)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eVoltage\u003c\/th\u003e\n\u003ctd\u003e1.1V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePins\u003c\/th\u003e\n\u003ctd\u003e288\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Hynix","offers":[{"title":"Default Title","offer_id":62810494108019,"sku":"HMCG88MEBRA115N","price":1550.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0992\/9546\/1747\/files\/dm_hmcg88mebra115n_1.jpg?v=1778008916","url":"https:\/\/cpurepublic.com\/products\/hynix-32gb-ddr5-4800-rdimm-hmcg88mebra115n","provider":"CPU Republic LLC","version":"1.0","type":"link"}