DDR4 Server Memory
8GB, 16GB, 32GB, and 64GB DDR4 ECC RDIMMs and LRDIMMs for Dell 13th–15th-gen PowerEdge, HPE Gen9–Gen10 Plus, and Xeon Scalable workstations — load-tested in same-generation servers and priced well below new-module cost.
DDR4 Server Memory — 16GB, 32GB & 64GB ECC RDIMMs
DDR4 is the value pocket of the 2026 memory market: new-module prices keep climbing, while tested refurbished RDIMMs sell for a fraction of list — we explain why in Refurbished DDR4 Server Memory: The 2026 RAM Price Fix. PC Server & Parts stocks 8GB, 16GB, 32GB, and 64GB DDR4 ECC RDIMMs and LRDIMMs — singles and matched kits — from Samsung, SK Hynix, and Micron, pulled from working Dell PowerEdge, HPE ProLiant, and Lenovo servers and load-tested before they ship.
Which Platforms Take DDR4
- Xeon E5-2600 v3 / v4 (Dell 13th-gen R630/R730, HPE Gen9): DDR4-2133 and DDR4-2400 RDIMMs.
- 1st / 2nd Gen Xeon Scalable (Dell 14th-gen R640/R740, HPE Gen10): DDR4-2666 and DDR4-2933.
- 3rd Gen Xeon Scalable & AMD EPYC Rome/Milan (Dell R650/R750/R7525, HPE Gen10 Plus): DDR4-3200.
- Workstations: Dell Precision T5810–T7920, HP Z440–Z8 G4, and ThinkStation P-series all run DDR4 — registered modules on the dual-socket platforms, unbuffered ECC on entry towers.
Faster modules simply downclock to the platform ceiling, so a 3200 MT/s stick is a safe buy for a 2666 MT/s board. Check your CPU generation or motherboard spec — or send us the server model and we will match the modules for you.
Why Buy DDR4 Memory from PCSP
- Load-tested: every module is exercised in a same-generation server — ECC function, full capacity, and rated speed verified before listing.
- Platform-matched: we confirm fit against your exact machine, not just the spec sheet.
- 90-day returns: DOA or non-conforming parts come back on us.
- Fast shipping: in-stock modules ship the same business day when ordered before 1:00 pm EST.
Running older 11th/12th-generation hardware? See DDR3 server memory. Moving to current platforms? Browse DDR5 RDIMMs — or the full Server RAM & Memory selection.
Quick Answers: DDR4 Server Memory
How do I know my server takes DDR4?
Match the CPU generation: Xeon E5-2600 v3/v4, any Xeon Scalable through 3rd Gen, and AMD EPYC through Milan are all DDR4 platforms — roughly Dell PowerEdge 13th to 15th generation and HPE Gen9 through Gen10 Plus. The notch on a DDR4 DIMM is keyed differently from DDR3 and DDR5, so the wrong generation physically will not seat. If in doubt, send us your server or motherboard model and we will confirm before you order.
Do I need RDIMM or LRDIMM DDR4?
RDIMMs are the right choice for most configurations — a 16GB or 32GB DDR4 RDIMM kit covers typical virtualization and database duty. LRDIMMs only pay off when you are chasing maximum capacity with 64GB+ modules on fully populated dual-socket boards. The two types cannot be mixed in one system, so match what is already installed.
Can I mix 16GB and 32GB DDR4 modules?
Mixed capacities can work on most platforms, but performance and stability favor uniform kits: identical capacity, rank, and speed across channels keeps memory interleaving intact, and mismatched ranks are the most common cause of a no-boot. If you are expanding an existing set, tell us what is installed and we will match rank and speed to it.
What if a module arrives dead or fails in my server?
Every stick is load-tested in same-generation hardware before it ships, and loose parts are covered by our 90-day return policy — DOA or non-conforming memory comes back at our expense. Orders placed before 1:00 pm EST ship the same business day.