Samsung
A-Tech 32GB RAM Replacement for Samsung M393A4K40CB2-CTD | DDR4 2666MHz PC4-21300 2Rx4 1.2V ECC RDIMM Registered 288-Pin DIMM Memory Module
Available Styles / Variations:
Enterprise ECC Stability
Validated by C.R. Vinoth Kumar ยท Founder & Senior Editor
This is an Error Correcting Code (ECC) server module designed to prevent silent data corruption in 24/7 server environments (like TrueNAS/ZFS or enterprise workloads). Ensure your motherboard and CPU officially support ECC before purchasing.
Current price
$239.39$7.48/GBAs of May 30, 2026 ยท Verify on Amazon ยท Price subject to change
$/GB vs DDR4 market avg
27% below avgDeal score
91/100
At $7.48/GB โ 27% below the DDR4 market average.
Good time to buy
Price is near its tracked low of $239.39 โ in the bottom 20% of its recorded range.
Verify Alternative Stores
Our systems refresh prices daily from Amazon.com to secure the absolute lowest USD market rate. You can cross-reference this RAM kit (ASIN: B07SYD7BKM) against alternative marketplaces like Newegg or Crucial before buying.
Product prices and availability are accurate as of the date of the last daily update and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply to the purchase of this product. As an Amazon Associate we earn from qualifying purchases.
At a Glance
Strengths
- 27% below the overall DDR4 market average $/GB
- Price near its tracked low of $239.39
Limitations
- Limited review data โ only 1 Amazon reviews
- Requires ECC-compatible CPU and motherboard โ not supported on most consumer platforms
- Availability unconfirmed โ may be out of stock or delisted
All points are derived from price data, customer ratings, and product specifications โ not editorial opinion. Updated daily.
Is This RAM Right for You?
Based on 32GB DDR4 ECC DIMM specifications.
ECC RAM is not supported on gaming platforms (consumer CPUs/boards)
ECC RAM requires server-grade hardware โ not compatible with standard office PCs
ECC RAM protects long renders from silent data corruption โ ideal for professional workstations
ECC RAM detects and corrects memory errors โ required for data-critical servers and ZFS storage
This is a desktop DIMM โ laptop upgrades require SO-DIMM modules. See Laptop RAM Prices for compatible options.
Verdicts based on capacity, form factor, and ECC specifications โ not editorial opinion. Capacity recommendations reflect 2026 software requirements.
Price History
Updated daily โ track price trends over time
Current
$239.39
38d Low
$239.39
38d High
$251.99
38d Avg
$241.05
Price Range
Tracked low
$239.39Current
$239.39Tracked high
$251.99โ Near tracked low
Speed Ranking
Top 46%
2666MHz ranks in the top 46% of all DDR4 speeds tracked (1,546 modules).
Z-Score Deviation
Fair / Average Price
Deviation: -0.39ฯ
This product is currently priced within normal historical margins.
Specifications
Memory TypeDDR generation (DDR4 vs DDR5) ยท guide | DDR4 |
CapacityTotal kit memory size ยท guide | 32GB |
| Kit Config | โ Single stick โ runs in single-channel mode. Buy 2ร for dual-channel performance. |
SpeedFrequency in MT/s or MHz ยท guide | 2666MHz |
Form FactorDIMM (Desktop) vs SO-DIMM (Laptop) | RDIMM |
ECCError-correcting capability ยท guide | Yes |
VoltageOperating voltage level | 1.2V |
ASIN | B07SYD7BKM |
Spotted a wrong price or spec? Report a data correction ยท How we verify data
Cheaper Alternatives
Same 32GB DDR4 โ lower $/GB than this product
SK Hynix
Hynix HMA84GR7AFR4N-UH 32gb Ddr4-2400mhz Ecc Mem New Brown Box See Warranty Notes23% cheaper/GB
21% cheaper/GB
Samsung
Samsung 32GB DDR4 2400MHz PC4-19200 ECC RDIMM 2Rx4 Dual Rank 1.2V Registered DIMM 288-Pin Server RAM Memory M393A4K40CB1-CRC19% cheaper/GB
Ranked by lowest $/GB. Same 32GB DDR4 DIMM only. Prices updated daily.
DDR4 Price by Capacity
Average $/GB across all DDR4 modules in the database
| Capacity | Avg $/GB |
|---|---|
| 8GB | $9.68/GB |
| 16GB | $9.70/GB |
| 32GBThis product | $9.02/GB |
| 64GB | $8.97/GB |
| 128GB | $6.58/GB |
Also available from Samsung
Same brand, different configurations
Samsung
M378A1K43CB2-CTD Memory Module (8 GB, 1 x 8 GB, DDR4, 2666 MHz, 288-pin DIMMM, Black, Green)
Samsung
8GB DDR4 PC4-21300 2666MHz 288 PIN UDIMM 1.2V CL 19 Desktop ram Memory Module M378A1K43DB2-CTD
Samsung
SAMSUNG 8GB DDR4 PC4-19200, 2400MHZ, 288 PIN DIMM, 1.2V, CL 17 Desktop RAM Memory Module M378A1K43BB2-CRC
Related pages
Frequently Asked Questions
Is the Samsung 32GB 2666MHz DDR4 compatible with my motherboard?
Compatibility depends on your motherboard's supported memory type (DDR4), speed, and capacity. Check your motherboard manufacturer's QVL list to confirm this module is validated for your specific board.
Is this DDR4 module a good deal right now?
At $7.48/GB, this module is 27% below the overall DDR4 market average $/GB across all capacities. Deal score: 91/100. Check the price history chart above to see how the price has moved recently. Prices are updated daily from Amazon.
What is 2666MHz RAM used for?
This is an ECC (Error-Correcting Code) RAM module designed for servers, workstations, and NAS systems where data integrity is critical. ECC RAM detects and corrects single-bit memory errors automatically. It requires a compatible CPU and motherboard โ most consumer platforms do not support ECC. See our ECC RAM guide for platform compatibility details.
How does Samsung RAM compare to other brands?
Samsung has 133 modules tracked with an average customer rating of 4.6โ . This specific module is 27% below the overall DDR4 market average $/GB. Browse all Samsung modules or use the comparison tool to see how it stacks up against Corsair, G.Skill, Kingston, and Crucial.
Is 32GB of RAM enough for gaming in 2026?
32GB is more than enough for gaming in 2026. Most AAA titles use 16โ24GB alongside Discord and a browser. 32GB gives you headroom for streaming, recording, and running multiple applications simultaneously.
What is the difference between a single 32GB stick and a 2ร16GB kit?
A single 32GB stick runs in single-channel mode, using only one memory channel. A 2ร16GB kit of the same total capacity runs in dual-channel mode, doubling memory bandwidth and improving real-world performance by 10โ30%. For best performance, always buy RAM in matched pairs.
Similar DDR4 RAM
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A-Tech 32GB DDR4 3200 MHz UDIMM PC4-25600 (PC4-3200AA) CL22 DIMM 2Rx8 Non-ECC Desktop RAM Memory Module
Expertly Curated by C.R. Vinoth Kumar
Lead Hardware AnalystC.R. Vinoth Kumar is a senior systems systems engineer and memory hardware architect with over 12 years of experience benchmarking computer components, building performance virtualization servers, and assembling local LLM inference rigs. Every memory module tracked in our database is mathematically checked using custom telemetry to isolate nanosecond CAS latency bounds, price-per-gigabyte market averages, and Ryzen/Intel platform pairings.
As an Amazon Associate we earn from qualifying purchases. Prices are updated daily and may change on Amazon.