DDR5 ECC RDIMMs for 4th/5th Gen Xeon Scalable, Xeon 6, and AMD EPYC 9004/9005 platforms — tested pulls from current-generation servers at a serious discount to new. Don't see your module? Send us the server model and we'll quote from incoming stock.
DDR5 is where the 2026 memory shortage bites hardest — new RDIMMs are expensive and allocation-constrained (our take: What Every IT Buyer Needs to Know Right Now). PC Server & Parts stocks used DDR5 ECC RDIMMs: 32GB PC5-5600 and 16GB PC5-4800 modules. For another capacity or speed, send us your server model and target capacity and we will quote from incoming stock.
DDR5 platforms are strict about population order and rank matching — check your CPU generation or motherboard QVL, or let us confirm compatibility before you order.
Not ready for DDR5 pricing? DDR4 server memory is the value play of the current market, and DDR3 keeps legacy machines running. Browse the full Server RAM & Memory selection, or check current DDR3 and DDR4 prices before you commit to DDR5.
Everything current: 4th and 5th Gen Xeon Scalable and Xeon 6 (Dell PowerEdge 16th/17th generation, HPE Gen11/Gen12) and AMD EPYC 9004/9005 platforms, plus Xeon W-2400/W-3400 and Threadripper PRO workstations. DDR5 DIMMs are keyed differently from DDR4, so the wrong generation will not physically seat.
No. Every DDR5 chip has on-die ECC that only corrects errors inside the DRAM die — consumer UDIMMs have nothing more. Server RDIMMs add the traditional side-band ECC that protects data on the way to the CPU and lets the platform log and correct errors in operation. For servers, buy registered ECC modules, not desktop DDR5.
DDR5 platforms are pickier than DDR4: population order, rank, and vendor matching all affect whether the system trains at rated speed — and twelve-channel EPYC boards want uniform sticks across every channel. Buy capacity as a matched set where possible; if you are expanding, tell us the installed part numbers and we will match them.
