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  3. DDR4 ECC Server Memory

DDR4 ECC Server Memory

DDR4 ECC memory is the backbone of the current server fleet — Error-Correcting Code protects against single-bit faults, and Registered (RDIMM) or Load-Reduced (LRDIMM) buffering is what lets a server run many DIMMs stably. Every module here is server-grade DDR4 ECC, sold by exact manufacturer part number across 16GB, 32GB, 64GB and 128GB capacities and 2133 through 3200 MT/s speeds, from Micron, Samsung, SK Hynix and the HPE and Dell OEM-serialized parts your iLO or iDRAC expects. New and Refurbished stock sit together so you can compare a factory module against a tested pull for the same slot. ECC and buffering type must match your platform exactly — an unbuffered or non-ECC stick won't post in most servers — so confirm your population rules, or use the bulk-quote link and we'll pick the compatible part for your model. In stock, fast US shipping, warranty-backed, POs welcome.

New vs Recertified vs Refurbished

Every part is sold by exact manufacturer part number and ships warranty-backed. Here's what each condition means so you can weigh price against your workload.

New
Factory-sealed and unused, with the full manufacturer warranty. The safest choice for a fresh build or a warranty-sensitive deployment.
Recertified
OEM-recertified and restored to original specification, typically with low power-on hours. Health-tested and backed by our own replacement warranty — the same usable capacity for a lower price.
Refurbished
Professionally tested working pulls, wiped and inspected. A cost-effective option for labs, cold storage and non-critical tiers, warranty-backed.

Not sure which to pick? Read our New vs Recertified vs Refurbished guide.

Frequently asked questions

What does ECC actually do?+

ECC (Error-Correcting Code) memory detects and corrects single-bit errors on the fly, preventing silent data corruption and crashes — which is why servers require it. Desktop (non-ECC) memory won't post in most server platforms.

Registered (RDIMM) vs Load-Reduced (LRDIMM) DDR4?+

Both are buffered ECC types for servers. RDIMM buffers address/command lines and covers most builds; LRDIMM also buffers data lines to reach higher capacity per channel. Use whichever your server's rules specify.

Will DDR4 ECC work in my desktop?+

Generally no — most desktop boards need unbuffered non-ECC (or UDIMM ECC) memory and won't accept RDIMM/LRDIMM. These are server/workstation modules. Ask via the bulk-quote link if you're unsure about your board.

Related collections

64GB Server RAM (ECC)32GB Server Memory (RDIMM / LRDIMM)128GB Server Memory (LRDIMM / 3DS RDIMM)

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4081 parts

Part #BrandCapacityTypeSpeedRankECCConditionAvailabilityPrice
D4ER01-16G

D4ER01-16G - Synology 16GB DDR4 ECC Registered RDIMM Memory

Synology
16GB
DDR4
-
-
ECC
New
Check availability

$1,875.00

D4ER01-32G

D4ER01-32G - Synology 32GB DDR4 ECC Registered DIMM Memory

Synology
32GB
DDR4
-
-
ECC
New
Check availability
Request quote
CT4G4RFS8266

CT4G4RFS8266 - Crucial 4GB DDR4 2666MHz ECC DIMM 1.2V 288-Pin Memory

Crucial
4GB
DDR4
2666MHz
Single Rank
ECC
New
Check availability
Request quote
4X70F28591

4X70F28591 - Lenovo 32GB DDR4 2133MHz ECC RDIMM 1.2V 288-Pin Memory

Lenovo
32GB
DDR4
2133MHz
Quad Rank x4
ECC
New
Check availability
Request quote
4X70P98201

4X70P98201 - Lenovo 8GB DDR4 2666MHz ECC RDIMM 1.2V 288-Pin Memory

Lenovo
8GB
DDR4
2666MHz
Single Rank x4
ECC
New
Check availability
Request quote
4X70M09262

4X70M09262 - Lenovo 16GB DDR4 2400MHz ECC RDIMM 1.2V 288-Pin Memory

Lenovo
16GB
DDR4
2400MHz
Dual Rank x4
ECC
New
Check availability
Request quote
4X70P98202

4X70P98202 - Lenovo 16GB DDR4 2666MHz ECC RDIMM 1.2V 288-Pin Memory

Lenovo
16GB
DDR4
2666MHz
Dual Rank x4
ECC
New
Check availability
Request quote
4X70M09261

4X70M09261 - Lenovo 8GB DDR4 2400MHz ECC RDIMM 1.2V 288-Pin Memory

Lenovo
8GB
DDR4
2400MHz
Single Rank x4
ECC
New
Check availability
Request quote
00NV204

00NV204 - Lenovo 16GB DDR4 2400MHz ECC RDIMM 1.2V 288-Pin Memory

Lenovo
16GB
DDR4
DDR4-2400/PC4-19200
Dual Rank x4
ECC
New
Check availability

$195.00

4X70G88333

4X70G88333 - Lenovo 8GB DDR4 2400MHz ECC UDIMM 1.2V 288-Pin Memory

Lenovo
8GB
DDR4
2400MHz
Single Rank x8
ECC
New
Check availability
Request quote
4X70F28590

4X70F28590 - Lenovo 16GB DDR4 2133MHz ECC RDIMM 1.2V 288-Pin Memory

Lenovo
16GB
DDR4
2133MHz
Dual Rank x4
ECC
New
Check availability

$185.00

7X77A01303

7X77A01303 - Lenovo 16GB DDR4 2666MHz ECC RDIMM Memory Module

Lenovo
16GB
DDR4
2666 MHz
Dual Rank x8
ECC
Refurbished
Check availability

$230.00

95Y4808

95Y4808 - Lenovo 32GB DDR4 2133MHz ECC RDIMM 1.2V 288-Pin Memory

Lenovo
32GB
DDR4
2133MHz
Dual Rank x4
ECC
Refurbished
Check availability

$305.00

4X70F28589

4X70F28589 - Lenovo 8GB DDR4 2133MHz ECC RDIMM 1.2V 288-Pin Memory

Lenovo
8GB
DDR4
2133MHz
Single Rank x4
ECC
New
Check availability

$165.00

46W0833

46W0833 - Lenovo 32GB DDR4 2400MHz ECC RDIMM Memory Module

Lenovo
32GB
DDR4
2400 MHz
Dual Rank x4
ECC
Refurbished
Check availability

$290.00

03T6779

03T6779 - Lenovo 8GB DDR4 2133MHz ECC RDIMM 1.2V 288-Pin Memory

Lenovo
8GB
DDR4
2133MHz
Single Rank x4
ECC
Refurbished
Check availability

$162.00

46W0835

46W0835 - Lenovo 32GB DDR4 2400MHz ECC RDIMM Memory Module

Lenovo
32GB
DDR4
2400 MHz
Dual Rank x4
ECC
Refurbished
Check availability

$290.00

03T7861

03T7861 - Lenovo 8GB DDR4 2133MHz ECC RDIMM 1.2V 288-Pin Memory

Lenovo
8GB
DDR4
2133MHz
Single Rank x4
ECC
New
Check availability

$165.00

01KN303

01KN303 - Lenovo 16GB DDR4 2400MHz ECC RDIMM 1.2V 288-Pin Memory

Lenovo
16GB
DDR4
2400MHz
Dual Rank x8
ECC
Refurbished
Check availability

$195.00

7X77A01304

7X77A01304 - Lenovo 32GB DDR4 2666MHz ECC RDIMM Memory Module

Lenovo
32GB
DDR4
2666 MHz
Dual Rank x4
ECC
New
Check availability

$392.00

00NV205

00NV205 - Lenovo 32GB DDR4 2400MHz ECC RDIMM Memory Module

Lenovo
32GB
DDR4
2400 MHz
Dual Rank x4
ECC
Refurbished
Check availability

$362.00

7X77A01302

7X77A01302 - Lenovo 16GB DDR4 2666MHz ECC RDIMM 1.2V 288-Pin Memory

Lenovo
16GB
DDR4
2666MHz
Single Rank x4
ECC
Refurbished
Check availability

$245.00

7X77A01305

7X77A01305 - Lenovo 64GB DDR4 2666MHz ECC RDIMM Memory Module

Lenovo
64GB
DDR4
2666 MHz
Quad Rank x4
ECC
New
Check availability

$472.00

4X70G88319

4X70G88319 - Lenovo 16GB DDR4 2400MHz ECC RDIMM 1.2V 288-Pin Memory

Lenovo
16GB
DDR4
2400MHz
Dual Rank x4
ECC
Refurbished
Check availability

$195.00

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