A-Tech · A-Tech DDR5 RDIMM
M321R4GA0PB0-CWM is A-Tech A-Tech DDR5 RDIMM 32GB DDR5-5600. 2 of its 4 segments are defined in A-Tech's published documentation and decoded below; the rest are not publicly documented and are marked as such. 1 live listing below.
| Segment | What it means | Source |
|---|---|---|
| M | Samsung memory module prefix. | Samsung |
| 321 | DDR5 Registered DIMM (RDIMM). | Samsung |
| R4GA0PB0 | Not sourced - A-Tech does not publicly document this segment. | Not sourced |
| CWM | Not sourced - A-Tech does not publicly document this segment. | Not sourced |
We decode only what the manufacturer documents. There is a large body of community knowledge about the undocumented segments above, much of it probably right, and none of it published by A-Tech - so it does not appear in this table. A reading nobody can check does not belong in a column headed “what it means”. Grammar reference: Samsung - DDR4/DDR5 module part-number decoder.
M321R4GA0PB0-CWM is A-Tech A-Tech DDR5 RDIMM, a 32GB server memory module on DDR5-5600. Registered ECC modules are not interchangeable with unbuffered desktop memory, and a server board will generally refuse to post with the wrong type rather than run slowly.
We currently track 1 live listing against this exact part number. We document no sibling variants for this part number.
| Manufacturer | A-Tech |
| Family | A-Tech DDR5 RDIMM |
| Capacity | 32GB |
| Interface | DDR5-5600 |
| Product class | RAM |
| Listing | Condition | Pack | $/TB | Price | |
|---|---|---|---|---|---|
| A-Tech 32GB DDR5-5600 ECC RDIMM | New This offer: sold by A-Tech Components · Amazon says New / Unknown | single | $38208.00 | $1194.00 | Buy |
A manufacturer part number does not imply a manufacturer warranty, and this is where part-number buyers lose the most money. OEM stock, integrator pulls and gray-market units all reach the market under the maker's own numbering. Retailers selling them sometimes state plainly that the manufacturer warranty is none; others simply do not mention it, which is not the same as it being covered.
Coverage attaches to the individual unit and its serial number, not to the part number. That means the only reliable answer comes from the manufacturer, about the specific drive you are being sold.
Ask the seller for the serial number and check it with A-Tech directly before buying. We do not link a checker for this manufacturer because we have not verified one.
A seller warranty is a different promise from a different company. What each warranty tier actually covers · Verify on arrival
4 in-stock listings · same capacity and interface, any part number · ranked by live cost per gb, refreshed every few hours
| Drive | Capacity | Condition | $/GB | Price | |
|---|---|---|---|---|---|
| Kingston 32GB DDR5-5600 ECC RDIMM KSM56R46BD8PMI | 32GB | REFURB This offer: sold by Custom Hardware · Amazon says Used / LikeNew | $31.25 | $1000 | Buy/View Price |
| A-Tech 32GB DDR5-5600 ECC RDIMM M321R4GA0PB0-CWM | 32GB | NEW This offer: sold by A-Tech Components · Amazon says New / Unknown | $37.31 | $1194 | Buy/View Price |
| SK Hynix 32GB DDR5-4800 ECC RDIMM HMCG88AEBRA168N | 32GB | NEW This offer: sold by A-Tech Components · Amazon says New / Unknown | $42.25 | $1352 | Buy/View Price |
| NEMIX 32GB DDR5-4800 ECC RDIMM MTC20F2085S1RC48BR | 32GB | NEW This offer: sold by nvtek · Amazon says New / Unknown | $42.44 | $1358 | Buy/View Price |
M321R4GA0PB0-CWM is A-Tech A-Tech DDR5 RDIMM 32GB DDR5-5600. 2 of its 4 segments are defined in A-Tech's own published documentation - the decode table on this page shows each one with the document that defines it. The remaining segments are not publicly documented, and we say so rather than repeating a community guess as fact.
Not necessarily, and the part number cannot tell you. Coverage depends on how the individual unit entered the market and whether it was registered, not on its model designation. OEM and gray-market stock reaches the market under manufacturer part numbers regularly and frequently carries no manufacturer warranty at all - some retailers print exactly that on the listing. Check the specific serial with the manufacturer before buying.
We track 1 live listing carrying this part number, shown above with condition and cost per terabyte. Prices come from Amazon US and are re-checked continuously; the buy links go to the live listing because the price can change between our check and your click.
Because more than one organisation names it. The manufacturer assigns a model number describing the product; a server vendor buying it in volume assigns its own spare-part number for its service catalogue; distributors sometimes add another. All identify the same physical drive, which is why one number returns listings that look like a different product. Our part number index explains the pattern per vendor.