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Manufacturer: SK Hynix Last updated: September 11, 2026
SK Hynix HMCG78MEBRA (16GB DDR5-4800 ECC RDIMM/1Rx8/1.1V/288-Pin/Registered) Review
The SK Hynix HMCG78MEBRA offers a single-rank, smaller-capacity DDR5 RDIMM aimed at cost-sensitive per-channel population in new EPYC and Xeon builds, for deployments that don't need the largest available per-module capacity.
Registered ECC memory in a single-rank DDR5 configuration, offering a lower-cost per-channel population option for current-generation server platforms compared to higher-capacity dual-rank modules. For AMD EPYC Genoa/Turin and Intel Xeon Sapphire/Emerald Rapids servers with explicit DDR5 RDIMM support. Against the Samsung M321R4GA3BB6-CQK, covered elsewhere on this site, that module doubles this drive's capacity in a dual-rank configuration at a higher price. Against the Nemix RAM 32GB DDR5-4800 ECC RDIMM, also covered elsewhere on this site, both target cost-conscious server deployments, with this SK Hynix module offering official brand-name sourcing.
ECC and Registered Operation
Registered ECC memory in a single-rank DDR5 configuration, offering a lower-cost per-channel population option for current-generation server platforms compared to higher-capacity dual-rank modules.
Compatibility
For AMD EPYC Genoa/Turin and Intel Xeon Sapphire/Emerald Rapids servers with explicit DDR5 RDIMM support.
Comparison to Sibling Products
Against the Samsung M321R4GA3BB6-CQK, covered elsewhere on this site, that module doubles this drive's capacity in a dual-rank configuration at a higher price. Against the Nemix RAM 32GB DDR5-4800 ECC RDIMM, also covered elsewhere on this site, both target cost-conscious server deployments, with this SK Hynix module offering official brand-name sourcing.
Specifications
Identity
| Brand | SK hynix |
|---|---|
| Series | SK Hynix Server |
Memory
| DDR Generation | DDR5 |
|---|---|
| Capacity | 16 GB |
| Speed | 4800 MT/s |
| Voltage | 1.1 V |
Module and platform
| RAM Segment | Server |
|---|---|
| Pin Count | 288 |
Capacity
| Capacity Per Module | 16 GB |
|---|---|
| Module Count | 1 |
Silicon
| ECC | Yes |
|---|
Commercial
| Warranty | Limited Lifetime |
|---|
| Model Number | HMCG78MEBRA |
|---|---|
| Rank Configuration | 1Rx8 (Single Rank, x8) |
| Registered | Yes (RDIMM) |
| Platform Compatibility | AMD EPYC Genoa/Turin, Intel Xeon Sapphire/Emerald Rapids |
| Spec Score | 1.2 |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Cost-sensitive server deployments that want lower per-channel capacity from an official first-party DRAM manufacturer. This module fits budget-conscious channel population without sacrificing manufacturer assurance.
Not for
- Not for deployments that need maximum capacity per module. The Samsung M321R4GA3BB6-CQK, covered elsewhere on this site, doubles the per-module capacity.
FAQs
What are the key specifications of the SK Hynix HMCG78MEBRA (16GB DDR5-4800 ECC RDIMM/1Rx8/1.1V/288-Pin/Registered)?
The SK Hynix HMCG78MEBRA (16GB DDR5-4800 ECC RDIMM/1Rx8/1.1V/288-Pin/Registered) is a memory kit from SK Hynix. Key specs: DDR Generation DDR5, Capacity 16GB, Kit Configuration 1 x 16GB, Pin Count 288, Speed 4800MHz.
Will the SK Hynix HMCG78MEBRA (16GB DDR5-4800 ECC RDIMM/1Rx8/1.1V/288-Pin/Registered) work with my current setup?
The SK Hynix HMCG78MEBRA (16GB DDR5-4800 ECC RDIMM/1Rx8/1.1V/288-Pin/Registered) lists DDR Generation is DDR5. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits. Our upgrade checker at /upgrade can confirm compatibility for common combinations.
Who is the SK Hynix HMCG78MEBRA (16GB DDR5-4800 ECC RDIMM/1Rx8/1.1V/288-Pin/Registered) best suited to?
It suits cost-sensitive server deployments that want lower per-channel capacity from an official first-party dram manufacturer. this module fits budget-conscious channel population without sacrificing manufacturer assurance..
What are the drawbacks of the SK Hynix HMCG78MEBRA (16GB DDR5-4800 ECC RDIMM/1Rx8/1.1V/288-Pin/Registered)?
It is a poor fit for not for deployments that need maximum capacity per module. the samsung m321r4ga3bb6-cqk, covered elsewhere on this site, doubles the per-module capacity..