Server Memory Hub
Pro Disk Network stocks 91,000+ server memory modules across every generation (DDR3 through DDR5), every rank (1R, 2R, 4R, 8R), every form factor (RDIMM, LRDIMM, UDIMM, SoDIMM), and every major brand (HP/HPE, Dell, IBM/Lenovo, Kingston, Crucial, Samsung, Micron). All modules tested against the target server's published compatibility matrix before shipment. Same-day US shipping; bulk orders Net 30.
Memory by Brand
OEM-validated kits ship with the same part number your server vendor specs:
- HP Server Memory — DDR3/DDR4/DDR5 RDIMM for ProLiant Gen8-Gen11
- Dell Server Memory — OEM-matched DDR4/DDR5 RDIMM/LRDIMM for PowerEdge
- Kingston Server Memory — DDR4 ECC RDIMM/LRDIMM
- Memory Category — All 91K modules across every brand and generation
Memory by Form Factor
Match the form factor to your motherboard's DIMM slots:
- All Server Memory — Full catalog — DDR3/4/5, RDIMM/LRDIMM/UDIMM
Memory by Server Platform
Pre-validated memory kits for specific server platforms:
- Dell PowerEdge R740 memory — R740 memory compatibility deep-dive
- HP DL380 memory — ProLiant DL380 memory upgrade paths
Buying Guides & In-Depth Articles
Long-form content from Pro Disk Engineering on this topic:
Side-by-Side Comparisons
- ECC vs Non-ECC (with HowTo schema and 5-step decision framework)
Frequently Asked Questions
Do I need ECC memory in my server?
If your server runs production workloads, databases, virtualization, or anything where data corruption matters — yes. ECC corrects single-bit errors silently and reports multi-bit errors before they crash the system. Non-ECC is acceptable only for stateless workloads with full data replication. ECC modules cost only 10-20% more than non-ECC; the premium is trivial for production gear.
What's the difference between RDIMM and LRDIMM?
RDIMM uses a single register chip to buffer command/address signals (reducing electrical load on the CPU). LRDIMM buffers both command/address AND data through an iMB (Isolation Memory Buffer), allowing much higher capacities per channel — 128GB or 256GB per module vs RDIMM's 64GB ceiling. Cost: LRDIMM adds 1-2 cycles of latency. Choose RDIMM for performance, LRDIMM for capacity.
Will memory from one server work in another?
Only if: (1) same generation (DDR3/4/5), (2) same form factor (RDIMM/LRDIMM/UDIMM), (3) compatible speed (mixed speeds downclock to slowest), (4) compatible rank, (5) validated against target server's QVL. Even if all this matches, OEM-validated modules from HP, Dell, Lenovo, etc. are often required for full warranty and firmware support.
How much memory does my server support?
Maximum memory is per-CPU and per-platform. Modern dual-socket Xeon Scalable supports 4TB total (256GB×16 LRDIMMs). EPYC Genoa supports 6TB. Older platforms (Gen8-Gen10) typically max at 1-3TB. Check your specific server's QVL for limits.
Can I mix DDR4 and DDR5?
No. DDR4 and DDR5 use different DIMM slots, signaling, and voltage. The motherboard determines which generation is supported. Mixing is not possible — nor would it work even if physically connected.
How to Pick the Right Server Memory
A step-by-step procedure to apply when selecting hardware in this category:
- Verify generation and form factor: Read your motherboard manual or server QVL. Most modern servers use DDR4 RDIMM or DDR5 RDIMM. Some high-capacity platforms use LRDIMM. Older systems may still use DDR3 or DDR3L.
- Determine if you need ECC: Production workloads = ECC. Dev/test stateless = non-ECC acceptable. ECC adds 10-20% cost and is required by most server platforms anyway.
- Match speed to CPU support: Server CPUs lock memory speed via their integrated memory controller. Faster DIMMs work but will downclock. Match the listed MT/s rate from your CPU's spec sheet.
- Pick rank and capacity: Single-rank (1R) lowest latency. Dual-rank (2R) better bandwidth utilization. Quad-rank (4R) and 8-rank (LRDIMM) for capacity-maximization. Capacity sweet spot: 32GB-64GB per module for cost-efficiency.
- Match brand to platform when possible: OEM-validated modules (HP, Dell, IBM) provide guaranteed firmware compatibility. Trusted aftermarket (Kingston Server Premier, Crucial Pro) is fine for non-OEM-locked platforms.
- Buy one DIMM to test, then bulk-order: Install one, boot, verify it's recognized at full speed and capacity. Run memtest86 for 24 hours minimum before committing to fleet purchase.
Need a memory kit validated for your server?
Email sales@prodisknetwork.com with your server make, model, and serial number — we'll respond with the exact validated part numbers, capacities, and bulk pricing within one business day. Net 30 available for verified businesses.
Request a quote › B2B / Net 30 details › Email sales@prodisknetwork.com