{"product_id":"ibm-lenovo-64gb-ddr4-2133-lrdimm-95y4811-95y4812-47j0257","title":"IBM \/ Lenovo 64GB 2133MHz DDR4 PC4-17000 ECC Registered CL15 288-Pin Load Reduced DIMM 1.2V Quad Rank x4 Memory Module - 95Y4811 \/ 95Y4812 \/ 47J0257","description":"\u003cp\u003eThe IBM 95Y4811 and the IBM 47J0257 are two numbers for one module: a 64GB DDR4-2133 LRDIMM for IBM System x servers, which Lenovo now sells. It is quad rank with x4 chips, runs at 1.2V, and has 288 pins. The label reads 64GB 4Rx4 PC4-2133P-L.\u003c\/p\u003e\n\u003ch2\u003eFour numbers, one module\u003c\/h2\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eNumber\u003c\/th\u003e\n\u003cth\u003eWhat it is\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003e95Y4812\u003c\/th\u003e\n\u003ctd\u003eOption number. Lenovo's name is 64GB TruDDR4 Memory (4Rx4, 1.2V) PC4-17000 CL15 2133MHz LP LRDIMM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003e95Y4814\u003c\/th\u003e\n\u003ctd\u003eLenovo FRU (service) number\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003e47J0257\u003c\/th\u003e\n\u003ctd\u003ePart number on the Lenovo label. Lenovo's support note pairs it with FRU 95Y4814\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003e95Y4811\u003c\/th\u003e\n\u003ctd\u003eNumber that sellers list with the others\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eLenovo's feature code for the option is A5UK. TruDDR4 is Lenovo's name for memory it has qualified for its servers.\u003c\/p\u003e\n\u003ch2\u003eCheck the label first\u003c\/h2\u003e\n\u003cp\u003eLenovo's support note covers the Hynix build of this module. A label that reads HMAA8GL7MMR4N-TF T1, with 11S47J0257Yxx1MV in the barcode, should not go in an x3850 X6 or x3950 X6. A label that reads TF TD, with 11S47J0257Yxx0MV, is fine there. In those X6 servers Lenovo also caps the speed at 1600 MHz in lock-step mode, with two modules per channel at most.\u003c\/p\u003e\n\u003ch2\u003eSystem x M5 notes\u003c\/h2\u003e\n\u003cp\u003eLenovo lists this module for the System x3550 M5, which takes up to 24 of them. Its note also clears the x3500 M5, x3650 M5, nx360 M5, and Flex System x240 M5. Lenovo says mixing RDIMMs and LRDIMMs is not supported.\u003c\/p\u003e\n\u003cp\u003eThese servers accept 2133 or 2400 memory. 2400 runs at full speed only with Xeon E5-2600 v4 processors. With a v3 processor, 2133 is the speed you get, which is 17 GB\/s per module.\u003c\/p\u003e\n\u003ch2\u003eWhy LRDIMM\u003c\/h2\u003e\n\u003cp\u003eLoad-reduced modules carry buffer chips that hide the load of all the memory chips from the controller. That lets a server hold more memory per channel. The trade is a little extra latency and some added power.\u003c\/p\u003e\n\u003ch2\u003eQuick answers\u003c\/h2\u003e\n\u003ch3\u003eIs 47J0257 the same as 95Y4811?\u003c\/h3\u003e\n\u003cp\u003eYes. Both numbers name this 64GB module. Sellers list 95Y4811 with 95Y4812 and 95Y4814, and Lenovo ties 47J0257 to 95Y4814.\u003c\/p\u003e\n\u003ch3\u003eIs IBM the same as Lenovo here?\u003c\/h3\u003e\n\u003cp\u003eYes. Lenovo bought IBM's System x line in 2014. The parts kept their numbers.\u003c\/p\u003e\n\u003ch3\u003eDoes it work in a desktop?\u003c\/h3\u003e\n\u003cp\u003eNo. Load-reduced ECC modules need a server board.\u003c\/p\u003e\n\u003ch2\u003e95Y4811 and 47J0257 specifications\u003c\/h2\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eIBM \/ Lenovo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003ePart numbers\u003c\/th\u003e\n\u003ctd\u003e95Y4811, 95Y4812, 95Y4814, 47J0257\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCapacity\u003c\/th\u003e\n\u003ctd\u003e64GB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eType\u003c\/th\u003e\n\u003ctd\u003eDDR4 LRDIMM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eSpeed\u003c\/th\u003e\n\u003ctd\u003e2133 MT\/s (PC4-17000)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eRank\u003c\/th\u003e\n\u003ctd\u003e4Rx4 (quad rank, x4)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eCAS latency\u003c\/th\u003e\n\u003ctd\u003eCL15\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eVoltage\u003c\/th\u003e\n\u003ctd\u003e1.2V\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\u003ctr\u003e\n\u003cth scope=\"row\"\u003eBandwidth\u003c\/th\u003e\n\u003ctd\u003e17 GB\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth scope=\"row\"\u003eFits\u003c\/th\u003e\n\u003ctd\u003eSystem x M5; X6 by label (see above)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"IBM","offers":[{"title":"Default Title","offer_id":62811033305459,"sku":"95Y4811","price":1207.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0992\/9546\/1747\/files\/95y4811.jpg?v=1778022002","url":"https:\/\/cpurepublic.com\/products\/ibm-lenovo-64gb-ddr4-2133-lrdimm-95y4811-95y4812-47j0257","provider":"CPU Republic LLC","version":"1.0","type":"link"}