HMCG78AGBUA081N - 16GB DDR5-5600 UDIMM | SK Hynix | Desktop
MPN: HMCG78AGBUA081N ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $244.95 | $244.95 |
| 10 | $249.9 | $2,499.00 |
| 100 | $254 | $25,400.00 |
| 500 | $265 | $132,500.00 |
| 1,000 | $279.2 | $279,200.00 |
Drop-in alternatives for HMCG78AGBUA081N — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
HMCG78AGBUA084N
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$38 / Unit
View Datasheet →HMCG78AEBRA107N
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$399 / Unit
View Datasheet →HMCG78MEBSA092N
✅ Drop-In ⚠️ 参数待验证✓ In Stock
$39.9 / Unit
View Datasheet →M323R2GA3BB0-CWM
✅ Drop-In📋 Reference alternative (not in catalog)
CT16G56C46U5
✅ Drop-In📋 Reference alternative (not in catalog)
KVR56U46BS8-16
✅ Drop-In📋 Reference alternative (not in catalog)
HMCG78AGBUA081N Maximum Ratings & Electrical Characteristics
| Memory Type | DDR5 SDRAM |
| Capacity | 16 GB (2Gx64) |
| Form Factor | 288-pin UDIMM |
| Data Rate | 5600 MT/s (PC5-44800) |
| CAS Latency | CL46 |
| Operating Voltage | 1.1 V |
| ECC | Non-ECC |
| Buffering | Unbuffered |
| Organization | 1Rx8 (Single Rank, x8 DRAM) |
| DRAM Composition | 8 x 2Gx8 DDR5 DRAM |
| Ranks | Single Rank |
| Compatible Platforms | Desktop |
| Module Class | SDP-UDIMM |
| On-module PMIC | Yes (DDR5 standard) |
| Mounting Type | Slot-in DIMM connector |
HMCG78AGBUA081N standard Pin Configuration Guide
Complete pinout information for HMCG78AGBUA081N (standard package). This digital IC includes GPIO, communication interfaces (UART, SPI, I2C), and power pins. Refer to the manufacturer datasheet for alternate pin functions and configuration options. Essential for embedded system design and PCB layout.
No detailed pinout data available for HMCG78AGBUA081N.
Refer to the datasheet for full pin configuration.
Safe Operating Area (SOA) & Thermal Characteristics
No official SOA curve available for this digital IC. Always operate within absolute maximum ratings specified in the datasheet. Ensure adequate cooling and derate as needed.
Typical Applications
HMCG78AGBUA081N is suitable for 6 applications: Desktop PC Memory Upgrade, DDR5 Overclocking and Enthusiast Builds, Workstation Content Creation, Industrial and Embedded PCs, Mini PC and SFF Systems, Gaming PC Builds.
Desktop PC Memory Upgrade
The HMCG78AGBUA081N is purpose-built for desktop DDR5 memory upgrades, providing 16GB per module at DDR5-5600 with CL46 timing at 1.1V. Its single-rank 1Rx8 x8 organization keeps the memory controller load light, which preserves speed headroom when populating two DIMM slots per channel on consumer platforms such as Intel 600/700-series and AMD AM5 boards. The module plugs into any 288-pin DDR5 UDIMM slot; DDR5's dual 32-bit sub-channel architecture improves effective bandwidth for everyday multitasking. Because it is non-ECC and unbuffered, it matches exactly what desktop chipsets require - RDIMMs will not POST on these boards. Verify the motherboard QVL supports 5600 MT/s with a single module per channel; otherwise the module degrades gracefully to a lower JEDEC speed.
Recommended
DDR5 Overclocking and Enthusiast Builds
Enthusiast builders favor the HMCG78AGBUA081N because its Hynix single-rank x8 die family has demonstrated stable operation above 8000 MT/s on high-end overclocking boards, as documented in community forums such as Reddit r/overclocking. At stock settings the module runs a conservative 5600 MT/s CL46 at 1.1V, leaving substantial voltage and timing headroom for manual profiles. Single-rank modules simplify command scheduling and reduce controller stress compared with dual-rank sticks, a key factor when pushing memory fabric frequencies on platforms like the ASUS Apex series. For best results, pair identical sticks in a two-module kit configuration and raise VDD/VDDQ incrementally while validating with memory stress tests. Note that any overclock falls outside JEDEC specification and must be validated per-board.
Recommended
Workstation Content Creation
For workstation workloads - video editing, 3D rendering, CAD - the HMCG78AGBUA081N supplies 16GB of DDR5-5600 bandwidth (PC5-44800) per stick, and multiple sticks scale capacity across available UDIMM slots. DDR5's doubled bank count (32 banks, 8 bank groups) versus DDR4 improves concurrent read/write efficiency in bursty, memory-hungry applications like After Effects, Blender, and simulation tools. The 1.1V operating voltage with on-module PMIC reduces platform power draw and thermal load inside compact workstation chassis compared with DDR4-3200 alternatives. Since the module is non-ECC unbuffered, it suits professional-creator workstations but not ECC-requiring server boards. Populate matched modules per channel to enable full dual-sub-channel interleaving and maximize sustained bandwidth for large asset streaming.
Recommended
Industrial and Embedded PCs
Industrial PCs, edge gateways, and embedded controllers built on desktop-class chipsets accept the HMCG78AGBUA081N as a JEDEC-standard DDR5-5600 UDIMM. Its 1.1V rail reduces system-level power consumption and heat in fanless or sealed enclosures, while the on-module PMIC offloads voltage regulation from the carrier board, simplifying power-tree design for embedded motherboards. The 16GB capacity comfortably hosts containerized edge runtimes and local inference workloads. Integration cautions: confirm the industrial CPU's memory controller certifies 5600 MT/s operation, since many embedded SKUs officially support lower grades such as DDR5-4800; the module will down-clock accordingly. Also verify mechanical clearance, as 288-pin UDIMM height can conflict with low-profile chassis or shrouds.
Recommended
Mini PC and SFF Systems
Mini PCs and small-form-factor systems with DDR5 SO-DIMM-free, UDIMM-based designs use the HMCG78AGBUA081N to reach 16GB of DDR5-5600 memory in a single slot, with a second module enabling dual-channel. DDR5's two independent 32-bit sub-channels per module already deliver improved concurrency for integrated-GPU memory sharing, which matters in systems without discrete graphics where bandwidth is contested between CPU and iGPU. The module's standard voltage of 1.1V aligns with the tight thermal budgets of compact chassis. Check minimum system requirements: some mini PC firmware requires single-module-per-channel operation at full speed, and mixed-rank configurations may de-rate to 4800 MT/s. Non-ECC unbuffered operation matches typical consumer-embedded chipsets in these systems.
Recommended
Gaming PC Builds
Gaming desktops on Intel 700-series or AMD AM5 platforms benefit from the HMCG78AGBUA081N's DDR5-5600 JEDEC baseline, which lifts minimum frame rates versus DDR4-3200 in memory-sensitive titles. The 16GB single-stick capacity supports a two-stick 32GB dual-channel configuration, the current sweet spot for modern games plus streaming overlays. Hynix single-rank x8 dies leave headroom for manual EXPO/XMP-class tuning beyond 6000 MT/s on AM5, where the memory fabric clock directly influences game performance. The module is non-ECC unbuffered, matching consumer chipsets, and its 1.1V PMIC-managed power keeps VRM thermal load low. Confirm motherboard QVL listing for 5600 MT/s two-DIMM operation, and populate slots per the manual for optimal signal topology.
Recommended
Recommended Products Summary
Engineering reference data for HMCG78AGBUA081N — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | HMCG78AGBUA084N | M323R2GA3BB0-CWM | CT16G56C46U5 | KVR56U46BS8-16 |
|---|---|---|---|---|---|
| Package | 288-pin UDIMM (SDP-UDIMM) | 288-pin UDIMM - same | 288-pin UDIMM - same | 288-pin UDIMM - same | 288-pin UDIMM - same |
| Brand | SK Hynix | SK Hynix | Samsung Electronics | Crucial (Micron Technology) | Kingston |
| Capacity | 16 GB | 16 GB | 16 GB | 16 GB | 16 GB |
| Data Rate | 5600 MT/s (PC5-44800) | 5600 MT/s | 5600 MT/s | 5600 MT/s | 5600 MT/s |
| CAS Latency | CL46 | CL46 | CL46 | CL46 | CL46 |
| Voltage | 1.1 V | 1.1 V | 1.1 V | 1.1 V | 1.1 V |
| ECC / Buffering | Non-ECC, Unbuffered | Non-ECC, Unbuffered | Non-ECC, Unbuffered | Non-ECC, Unbuffered | Non-ECC, Unbuffered |
| Rank / Organization | 1Rx8 (Single Rank) | 1Rx8 (Single Rank) | [DATA_NEEDED] | [DATA_NEEDED] | x8 based, Single Rank (per Newegg listing) |
| Overclocking Reputation | High (Hynix die, 8000+ MT/s reported by community) | High (same die family) | [DATA_NEEDED] | Moderate (Micron die) | Moderate (value line) |
Key Differentiators
- Proven overclocking headroom (vs CT16G56C46U5)
- Faster JEDEC speed grade than server-sibling modules (vs HMCG94MEBQA121N)
- Genuine OEM single-rank simplicity (vs KVR56U46BS8-16)
Design Notes
Never install the HMCG78AGBUA081N in a server board that requires registered RDIMMs - this is an unbuffered non-ECC module and RDIMM-only memory controllers will not train it. Conversely, ECC UDIMM boards can run non-ECC modules but will operate without error checking. Also verify population rules: many consumer platforms officially support DDR5-5600 only with one module per channel; two DIMMs per channel (2DPC) typically de-rates to 4400-5200 MT/s per board vendor documentation.
The module uses the DDR5-standard on-module Power Management IC (PMIC), which converts the 5V slot supply down to the 1.1V DRAM rail. This shifts thermal load onto the module itself rather than the motherboard VRM. In tightly packed SFF builds, ensure some airflow over the DIMM slot; estimate: a 16GB DDR5 module under load typically dissipates 2-4W, and PMIC efficiency losses add to this, so stagnant-air enclosures should confirm slot-area temperature stays within the module's rated operating range.
For overclocking above 7000 MT/s, install the two matched modules in the slots the motherboard manual designates for two-stick operation (usually slots A2/B2), which the board vendor has validated for the shortest fly-by routing. Hynix single-rank x8 dies in this module family are community-validated above 8000 MT/s on enthusiast boards, but that operation is outside JEDEC spec: raise VDD/VDDQ from 1.1V incrementally, validate with extended memory stress testing, and expect per-IMC (integrated memory controller) silicon lottery variance.
Compliance Information
Compliance data not stated in provided distributor listings; DDR5 modules from tier-1 manufacturers are typically RoHS-compliant but this must be confirmed from SK Hynix official product documentation.
