Enterprise DDR4 and DDR5 ECC RDIMM memory modules for servers. Samsung, Micron and SK Hynix. Prices updated every 4 hours.
DDR4 ECC RDIMM remains the standard for existing Intel Xeon (Ice Lake, Cascade Lake) and AMD EPYC (Milan, Rome) servers. DDR5 ECC RDIMM is required for Intel Sapphire Rapids, AMD EPYC Genoa and newer platforms. Check your server's memory specification before ordering - DDR4 and DDR5 are not cross-compatible.
| $/TB ▲ | Brand / Model | Cap | Interface | Tech | Cache | Sector | Wty | Price | Cond. | 90D | Buy | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
👑$5,758.40 ~ Fair | Samsung 32GB DDR4-2400 ECC RDIMM M393A4K40CB1-CRC 3yr | 32GB | DDR4-2400 | DDR4 | — | — | 3yr | $179.95 | new | ▼ | Buy →Details | ▼ |
$9,584.00 ~ Fair | SK Hynix 64GB DDR4-3200 ECC RDIMM HMAA8GR7AJR4N-XN 3yr | 64GB | DDR4-3200 | DDR4 | — | — | 3yr | $599.00 | new | ▲ | Buy →Details | ▼ |
$10,559.68 ~ Fair | Samsung 32GB DDR4-2666 ECC RDIMM M393A4K40CB2-CTD 3yr | 32GB | DDR4-2666 | DDR4 | — | — | 3yr | $329.99 | new | ▲ | Buy →Details | ▼ |
$10,559.68 ~ Fair | Samsung 32GB DDR4-2666 ECC RDIMM M393A4K40CB2-CTD 3yr | 32GB | DDR4-2666 | DDR4 | — | — | 3yr | $329.99 | new | ▲ | Buy →Details | ▼ |
$10,929.60 ~ Fair | SK Hynix 32GB DDR4-2666 ECC RDIMM HMA84GR7CJR4N-VK 3yr | 32GB | DDR4-2666 | DDR4 | — | — | 3yr | $341.55 | new | ▲ | Buy →Details | ▼ |
$31,679.68 ~ Fair | SK Hynix 32GB DDR5-4800 ECC RDIMM HMCG88AEBRA168N 3yr | 32GB | DDR5-4800 | DDR5 | — | — | 3yr | $989.99 | new | ▲ | Buy →Details | ▼ |
$36,799.84 ~ Fair | Micron 64GB DDR5-5600 ECC RDIMM MTC40F2046S1RC56BD2 3yr | 64GB | DDR5-5600 | DDR5 | — | — | 3yr | $2,299.99 | new | ▲ | Buy →Details | ▼ |
$— | Samsung 64GB DDR4-3200 ECC RDIMM M393A8G40AB2-CWE 3yr | 64GB | DDR4-3200 | DDR4 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | Samsung 64GB DDR4-3200 ECC RDIMM M393A8G40BB4-CWE 3yr | 64GB | DDR4-3200 | DDR4 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | SK Hynix 64GB DDR5-4800 ECC RDIMM HMCG94AEBRA123N 3yr | 64GB | DDR5-4800 | DDR5 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | SK Hynix 16GB DDR4-2400 ECC RDIMM HMA42GR7AFR4N-UH 3yr | 16GB | DDR4-2400 | DDR4 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | Micron 16GB DDR5-4800 ECC UDIMM MTC10C1084S1EC48BA1R 3yr | 16GB | DDR5-4800 | DDR5 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | Samsung 16GB DDR4-3200 ECC RDIMM M393A2K43DB3-CWE 3yr | 16GB | DDR4-3200 | DDR4 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | Samsung 32GB DDR4-3200 ECC RDIMM M393A4K40DB3-CWE 3yr | 32GB | DDR4-3200 | DDR4 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | Samsung 32GB DDR5-4800 ECC RDIMM M321R4GA3BB6-CQKOL 3yr | 32GB | DDR5-4800 | DDR5 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | Samsung 64GB DDR5-4800 ECC RDIMM M321R8GA0BB0-CQK 3yr | 64GB | DDR5-4800 | DDR5 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | SK Hynix 32GB DDR4-3200 ECC RDIMM HMA84GR7DJR4N-XN 3yr | 32GB | DDR4-3200 | DDR4 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | SK Hynix 16GB DDR4-3200 ECC RDIMM HMA82GR7DJR8N-XN 3yr | 16GB | DDR4-3200 | DDR4 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | SK Hynix 32GB DDR5-4800 ECC RDIMM HMCG88MEBRA107N 3yr | 32GB | DDR5-4800 | DDR5 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | Micron 16GB DDR4-3200 ECC RDIMM MTA18ASF2G72PDZ-3G2R1 3yr | 16GB | DDR4-3200 | DDR4 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | Micron 32GB DDR4-3200 ECC RDIMM MTA36ASF4G72PZ-3G2R1 3yr | 32GB | DDR4-3200 | DDR4 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | Micron 32GB DDR5-4800 ECC RDIMM MTC20C2085S1SC48BA1 3yr | 32GB | DDR5-4800 | DDR5 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | Kingston 32GB DDR4-3200 ECC RDIMM KSM32RD4/32MER 3yr | 32GB | DDR4-3200 | DDR4 | — | — | 3yr | $— | — | Buy →Details | ▼ | |
$— | Kingston 64GB DDR4-3200 ECC RDIMM KSM32RD4/64MER 3yr | 64GB | DDR4-3200 | DDR4 | — | — | 3yr | $— | — | Buy →Details | ▼ |
ECC detects and corrects single-bit memory errors. Required for servers and workstations running 24/7. Consumer desktops use non-ECC. All modules listed here are ECC.
RDIMM is standard for most 1-2 DIMM per channel configs. LRDIMM allows more DIMMs per channel (4+) at cost of slightly higher latency. UDIMM-ECC suits workstations with ECC-capable CPUs.
DDR5 starts at 4800MT/s vs DDR4's max 3200MT/s. DDR5 uses on-die ECC for improved reliability. Not backward compatible. Requires specific CPU and motherboard support.
Servers require identical DIMMs per channel. Always install in matched pairs. Consult your server's QVL (Qualified Vendor List) before purchasing.
ECC (Error-Correcting Code) RAM detects and corrects single-bit memory errors automatically. Required for data integrity in servers running 24/7 workloads. A single uncorrected memory error can cause data corruption or kernel panics. All enterprise servers require ECC memory.
No. DDR4 and DDR5 are physically incompatible - different slot notch positions, different voltages (1.2V vs 1.1V), different pin counts. Your server supports only one generation. Check your server's specification sheet.
This indicates rank and chip organization. 2R = dual rank (two independent sets of chips). x4 = each chip is 4 bits wide (more chips, more bandwidth). x8 = each chip is 8 bits wide (fewer chips). Dual rank (2R) modules generally perform better than single rank (1R) for servers.
Samsung, SK Hynix and Micron are the three primary DRAM manufacturers - virtually all server RAM originates from one of these three companies regardless of the reseller brand. Buying direct Samsung/Hynix/Micron OEM modules is recommended for production servers.