Samsung 64GB DDR4 2666MHz PC4-21300 ECC RDIMM 4Rx4 2S2Rx4 1.2V ECC Registered DIMM Server RAM Memory - M393A8K40B22-CWD
*Price sourced from Amazon.com. Last updated 2026-05-12. Price and availability subject to change.
Samsung RDIMM 64GB PC4 2666 DDR4 2S2Rx4 M393A8K40B22 CWD Server RAM Memory ECC Registered for Dell HP Lenovo Supermicro
SpecPicks Verdict
SpecPicks classifies Samsung 64GB DDR4 2666MHz PC4-21300 ECC RDIMM 4Rx4 2S2Rx4 1.2V ECC Re… as a category leader on buyer feedback in the memory & ram category, based on 2 verified Amazon reviews and our ranking model that weights rating × review-volume × price-fit. Use the Compare tool to put it side-by-side with two or three close alternatives before clicking through to Amazon.
Common buyer scenarios for memory & ram of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the Amazon listing before purchase. Prices, stock, and Prime eligibility update directly from Amazon's catalog and may have moved since this page was last verified.
Pros & Cons
Pros
- ✓ Highly rated — 5.0★ average across customer reviews
- ✓ Compatibility: all systems that support DDR4 RDIMM
- ✓ Ships via Amazon with Prime eligibility and the standard returns policy
Cons
- ✗ Limited review volume so far — fewer data points on long-term reliability
- ✗ Confirm socket / form-factor / power-rating compatibility against your build before ordering
- ✗ Price, stock, and Prime eligibility update from Amazon and may have changed since this page was last verified
Key Features
- Compatibility: all systems that support DDR4 RDIMM
- 64GB 2S2Rx4 PC4-2666V
Full Specifications
| Brand | Samsung |
|---|---|
| Voltage | 1.2 Volts |
| RAM Size | 64 GB |
| Model Name | M393A8K40B22-CWD |
| Form Factor | DIMM |
| Memory Speed | 2666 MHz |
| Model Number | M393A8K40B22-CWD |
| Compatibility | all systems that support DDR4 RDIMM |
| Number of Pins | 240 |
| Mfr Part Number | M393A8K40B22-CWD |
| Memory Generation | DDR4 |
| Compatible Devices | Server |
| Data Transfer Rate | 2666 MHz |
| Memory Form Factor | DIMM, RDIMM |
Ready to buy?
Samsung 64GB DDR4 2666MHz PC4-21300 ECC RDIMM 4Rx4 2S2Rx4 1.2V ECC Registered DIMM Server RAM Memory - M393A8K40B22-CWD is available on Amazon with Prime shipping and the full Amazon returns policy. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.
*Price sourced from Amazon.com. Last updated 2026-05-12. Price and availability subject to change.
Related Memory & RAM
