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SK Hynix 32GB DDR4-2933 ECC RDIMM Server Memory
Inclusive of VAT Β· Warranty included
SK HYNIX
Product Specification
| Manufacturer | SK Hynix |
| Part Number | HMAA4GR7AJR4N-WM |
| Capacity | 32GB |
| Memory Type | DDR4 SDRAM |
| Module Type | Registered DIMM (RDIMM) |
| Memory Speed | 2933MT/s |
| Module Designation | PC4-2933Y |
| CAS Latency | CL21 |
| ECC | Yes |
| Rank | Single Rank (1Rx4) |
| DRAM Organisation | x4 |
| DRAM Density | 16Gb |
| Voltage | 1.2V |
| Pins | 288 |
| Form Factor | DIMM |
About This Product
Overview
SK Hynix is one of the world's largest DRAM manufacturers, and the HMAA4GR7AJR4N-WM is one of its mainstream server memory modules. It is a 32GB DDR4 registered DIMM with ECC, built to the PC4-2933Y specification. Server builders and maintainers buy it to expand memory in existing systems, to complete a balanced configuration across every channel, or to replace a failed DIMM with the identical part number already in the machine.
The module's single-rank 1Rx4 construction is worth noting. Older 32GB RDIMMs were usually dual rank and built from 8Gb chips. This module reaches the same capacity on one rank by using 16Gb DRAM devices. The result is a 32GB stick that loads the memory channel more lightly.
Speed, Rank and Channel Population
At 2933MT/s with CL21 timings, the module matches the native memory speed of 2nd Generation Intel Xeon Scalable processors. Fitted in a system whose memory controller is limited to a lower speed, it will run at the speed the platform supports. On a supporting platform, populating every channel evenly with identical modules gives the best memory bandwidth, so buying several of the same part number is the usual approach.
Rank count affects how many modules a channel can hold and, on some platforms, the speed at which they run. A single-rank 32GB module offers a convenient way to reach high capacity per channel. Some platforms do benefit from rank interleaving with dual-rank modules, so check your server's memory population guide when mixing module types.
Deployment Scenarios
Registered ECC DIMMs like this belong in servers and workstations that run continuously and cannot tolerate silent data corruption. Common examples are hypervisor hosts running VMware ESXi, Proxmox or Hyper-V, where memory is usually the first resource to run out. SQL and in-memory database servers, file and application servers, and container platforms that pack many workloads onto a single node are also typical.
The module is widely deployed in Dell PowerEdge 14th generation and HPE ProLiant Gen10 servers fitted with Cascade Lake Xeon processors. Lab and homelab users running these platforms often prefer matching OEM-grade modules so that their configurations stay consistent and easy to troubleshoot.
Why Choose This Module?
The main reason is predictability. A clearly identified SK Hynix part number with published speed, rank and organisation makes it simple to match modules already installed. That reduces the chance of mixed-configuration issues or unexpected speed drops. ECC protection and the registered design are what server platforms require, and the x4 organisation supports the stronger error-correction modes many controllers offer.
At 32GB per DIMM, the module lets you reach several hundred gigabytes of memory in a two-socket server without moving to costlier high-capacity modules. For many organisations, adding memory to proven 2nd Gen Xeon Scalable hardware is a practical way to extend its service life and consolidate more workloads onto existing infrastructure.
About this memory module
SK Hynix 32GB DDR4-2933 ECC RDIMM, single rank module HMAA4GR7AJR4N-WM to the PC4-2933Y specification for second generation Xeon Scalable servers. Tested and stocked in Doha, delivered across Qatar within a day.
This SK Hynix 32GB registered ECC DIMM, part HMAA4GR7AJR4N-WM, runs at 2933MT/s, the memory speed introduced with second generation Intel Xeon Scalable processors. It is a single rank 1Rx4 module on a 288 pin RDIMM to the PC4-2933Y specification, server grade, for Dell PowerEdge and HPE ProLiant systems. Single rank at 32GB is achieved with high density chips, and it loads the memory channel lightly, so two per channel run at full speed.
Buyers in Qatar fit refurbished 32GB 2933 modules to 14th generation Dell and Gen10 HPE servers that carry Gold 6200 or Platinum 8200 processors, where slower modules would waste the platform's memory speed. ServerDove keeps it in Doha stock.
- Capacity
- 32GB
- Speed
- 2933MT/s
- Rank
- 1Rx4
- Spec
- PC4-2933Y
- Type
- DDR4 ECC RDIMM
Part numbers and identification
The Hynix part number on the label identifies the module exactly. Buyers search for "HMAA4GR7AJR4N-WM", "Hynix 32GB 2933 1Rx4" and "PC4-2933Y 32GB".
| SKU | RAM-SKHYNIX-32G-2933 |
| Manufacturer part number | HMAA4GR7AJR4N-WM |
| Manufacturer | SK Hynix |
| Specification code | PC4-2933Y |
| Organisation | 1Rx4, single rank |
Specification
| Size | 32GB |
| Memory type | DDR4 ECC Registered DIMM |
| Speed | 2933MT/s |
| Specification | PC4-2933Y |
| Rank | 1Rx4 single rank |
| Module form | 288 pin RDIMM |
| Grade | Server grade |
| Vendors | Dell PowerEdge, HPE ProLiant |
On a first generation Xeon Scalable processor this module runs at 2666MT/s, and on a Silver 4100 part at 2400MT/s; it reaches its rated 2933MT/s only with second generation processors. Twelve of them give a dual socket server 384GB at full speed with every channel populated once.
Hynix's HMAA prefix marks the die generation that reached 2933MT/s at 32GB on a single rank, and this exact part number appears in Dell and HPE factory configurations of second generation servers, so a buyer matching existing memory can often find it on the labels already fitted. Twenty four of these fill a dual socket server at 768GB with two per channel, still at 2933MT/s on this platform thanks to the light single rank load.
Installation
Power the server off and disconnect it. Populate the first slot of each channel on both processors before any second slot, following the board's slot lettering. Align the notch, press until both latches close, and keep all modules in the server the same capacity and speed. After boot check the BIOS for the total and for a 2933MT/s operating speed; a lower figure points to an older processor or a slower module elsewhere in the set.
In the box
- The part as described, with the part number shown
Images are for illustration. The unit supplied is the one described in the specification and may differ cosmetically.
Not included
- The server or system it installs into
- Mounting hardware, screws or caddies unless listed
- Cables unless listed
Frequently Asked Questions
What does HMAA4GR7AJR4N-WM mean?
HMAA4GR7AJR4N-WM is SK Hynix's part number for a 32GB DDR4 registered ECC DIMM. The -WM suffix denotes DDR4-2933 operation with 21-21-21 timings, which corresponds to the PC4-2933Y designation on the label. The module is single rank with x4 DRAM organisation and uses 16Gb DRAM devices. Matching this exact part number is the simplest way to keep a server's memory configuration consistent.
Is this the same as the HMAA4GR7AJR4N-XN?
Both are 32GB single-rank 1Rx4 DDR4 RDIMMs built on 16Gb DRAM, but they are rated at different speeds. The -XN version is rated at DDR4-3200, while this -WM module is rated at DDR4-2933. On 2nd Gen Intel Xeon Scalable servers, whose maximum memory speed is 2933MT/s, the two would typically operate at the same speed.
Will this RDIMM work in a Dell PowerEdge R740 or HPE DL380 Gen10?
DDR4-2933 registered ECC modules of this specification are used in Dell PowerEdge 14th generation servers such as the R740 and in HPE ProLiant Gen10 servers such as the DL380 Gen10. These servers run 2933MT/s memory when fitted with 2nd Gen Xeon Scalable processors. Check your system's memory guide and BIOS level, particularly for support of 16Gb-based RDIMMs, before ordering.
Can I mix this module with dual-rank or different-speed memory?
Most server platforms allow mixing ranks and speeds within the same module type, with some restrictions. Mixed-speed DIMMs generally run at the speed of the slowest installed module, and many vendors recommend identical modules within each channel for best performance. You should never mix RDIMMs with LRDIMMs or unbuffered DIMMs. Consult your server's population rules before combining different modules.
Can this memory be used in a desktop PC?
Generally, no. This is a registered ECC DIMM, and standard consumer desktop motherboards accept only unbuffered memory. They will typically fail to boot with an RDIMM installed. The module is intended for server and workstation platforms whose memory controllers support registered DDR4. That includes Intel Xeon Scalable systems and other platforms that explicitly list RDIMM support.
What is the advantage of a single-rank 32GB module?
A single-rank 1Rx4 module puts less electrical load on the memory channel than a dual-rank module of the same capacity. On platforms that limit total ranks per channel, or that reduce speed as more ranks are added, this makes it easier to populate more slots at full speed. Some workloads gain slightly from the rank interleaving that dual-rank modules provide, so the best choice depends on your platform.
What voltage and pin count does this module use?
The module uses the standard 288-pin DDR4 DIMM form factor and operates at the JEDEC DDR4 standard voltage of 1.2V. It is notched for DDR4 slots only. It will not physically fit DDR3 or DDR5 sockets, which use different pin counts and key positions.
Why buy refurbished?
Enterprise-grade performance at a fraction of the price of new.
Fully tested and verified
Every unit goes through hardware diagnostics before dispatch: POST tests, burn-in, memory checks and power supply verification.
Enterprise performance for less
Refurbished units deliver the same hardware capability as new, at significantly lower upfront cost, freeing budget for CPUs, memory and storage.
Available now
New enterprise hardware carries lead times of weeks or months. Our stock is held in Doha and ready to ship within 24 hours.
Backed by support
Warranty on every unit we sell, with installation and ongoing hardware support available across Qatar.