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Reliable DDR4 memory for daily operations.
838081-B21
HPE 16GB 1Rx4 PC4-2666V-R Smart Kit
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838081-B21
- Description:
- HPE 16GB 1Rx4 PC4-2666V-R Smart Kit
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838081-B21 Overview
838081-B21 is a DDR4 computer memory module designed in a UDIMM form factor for desktop systems. It features a speed of 3200 MHz, a CAS latency of CL16, a voltage of 1.35V, and an 8 GB capacity configured as a single channel module. This product is non-ECC and unbuffered, making it ideal for reliable performance in gaming and workstation builds.
Engineered with a robust heatspreader for effective thermal management, 838081-B21 is optimized for high-performance applications. It supports Intel XMP 2.0, is compatible with Intel 10th Gen and AMD Ryzen 3000 platforms, and is purpose-built for enthusiasts looking for dependable performance in modern PC builds.
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Request bulk order quote for 838081-B21 for additional pricing. Browse the full Hpe Memory & Ram series or explore all Hpe products.
838081-B21 Specifications
- Product Type
- Computer Memory
- Memory Type
- DDR4
- Capacity
- 8 GB
- Compatible Platforms
- Desktop
- Compatible Systems
- N/A
- Form Factor
- UDIMM
- Kit Configuration
- Single Channel
- Speed
- 3200 MHz
- Operating Temperature
- N/A
- Reliability Rating
- Standard
- CAS Latency (CL)
- CL16
- Voltage
- 1.35V
- ECC Support
- No
- Registered/Buffered
- Unbuffered
- XMP Support
- Intel XMP 2.0
- RGB Lighting
- No
- Heatsink / Heatspreader
- Yes
- Intel Platform Support
- Intel 10th Gen
- AMD Platform Support
- AMD Ryzen 3000
- Use Case
- Gaming
- Product Name
- 838081-B21 DDR4 8GB UDIMM 3200MHz CL16 Memory Module
- Height
- 1.2 inches
- Width
- 5.3 inches
- Depth
- 0.5 inches
- Weight
- 0.3 lbs
838081-B21 Use Case
Scaling Enterprise Virtualization with 838081-B21 HPE 16GB 1Rx4 PC4-2666V-R Smart Kit
In a global finance firm running VMware vSphere on HPE ProLiant DL380 Gen10 servers, deploying the 838081-B21 HPE 16GB 1Rx4 PC4-2666V-R Smart Kit boosts memory capacity per host by 64 GB. This upgrade increases VM consolidation ratios by 25 %, reduces vMotion latency by 15 %, and maintains strict compliance SLAs. Benefit: higher VM density and predictable performance with error-correcting ECC Registered memory.
Accelerating Real-Time In-Memory Analytics with HPE Smart Kit
A retail analytics provider leverages SAP HANA on HPE Superdome Flex servers, integrating the 838081-B21 HPE 16GB 1Rx4 PC4-2666V-R Smart Kit to optimize DRAM bandwidth at 2 666 MT/s. This configuration cuts complex report generation times by 30 % and delivers sub-second dashboards during peak sales. Benefit: immediate business insights and ROI through low-latency, high-availability memory.
Boosting HPC Simulation Throughput in Engineering R&D
An automotive R&D center runs CFD and crash-simulation workloads on HPE Apollo 6500 Gen10 clusters. By installing multiple 838081-B21 HPE 16GB 1Rx4 PC4-2666V-R Smart Kits per node, the team achieves uniform memory interleaving and ECC-verified stability. Simulation runtimes drop by 20 %, enabling faster design iterations and on-time project delivery. Benefit: consistent high-performance computing with proven reliability.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 838081-B21 |  838089-B21 |  P10729-B21 |  P00920-B21 |  815102-B21 | |
|---|---|---|---|---|---|
| Product Type | Computer Memory | Computer Memory | Computer Memory | Computer Memory | Computer Memory |
| Memory Type | DDR4 | DDR4 | DDR4 | DDR4 | DDR4 |
| Capacity | 8 GB | 16 GB | 16 GB | 16 GB | 16 GB |
| Compatible Platforms | Desktop | Desktop | Desktop | Desktop | Desktop |
| Compatible Systems | N/A | N/A | N/A | N/A | Workstation |
| Form Factor | UDIMM | UDIMM | UDIMM | UDIMM | UDIMM |
| Kit Configuration | Single Channel | Single Channel | Dual Channel | Single Channel | Single Channel |
| Speed | 3200 MHz | 3200 MHz | 3200 MHz | 3200 MHz | 3200 MHz |
| Operating Temperature | N/A | N/A | N/A | N/A | N/A |
| Reliability Rating | Standard | Standard | Standard | Standard | Standard |
| CAS Latency (CL) | CL16 | CL16 | CL16 | CL16 | CL16 |
| Voltage | 1.35V | 1.35V | 1.35V | 1.35V | 1.35V |
| ECC Support | No | No | No | No | No |
| Registered/Buffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered | Unbuffered |
| XMP Support | Intel XMP 2.0 | Intel XMP 2.0 | Intel XMP 2.0 | Intel XMP 2.0 | Intel XMP 2.0 |
| RGB Lighting | No | No | No | No | No |
| Heatsink / Heatspreader | Yes | Yes | Yes | Yes | Yes |
| Intel Platform Support | Intel 10th Gen | Intel 12th Gen | Intel 10th Gen | Intel 12th Gen | Intel 12th Gen |
| AMD Platform Support | AMD Ryzen 3000 | AMD Ryzen 5000 | AMD Ryzen 5000 | AMD Ryzen 5000 | AMD Ryzen 5000 |
| Use Case | Gaming | Gaming | Gaming / Workstation | Gaming | Gaming |
| Product Name | 838081-B21 DDR4 8GB UDIMM 3200MHz CL16 Memory Module | 838089-B21 16GB DDR4 Desktop Memory Module | P10729-B21 DDR4 Desktop Memory Module | P00920-B21 | 815102-B21 DDR4 16GB UDIMM Memory Module |
| Height | 1.2 inches | 1.2 inches | 1.3 inches | 1.2 inches | 1.2 inches |
| Width | 5.3 inches | 5.3 inches | 5.3 inches | 5.3 inches | 5.3 inches |
| Depth | 0.5 inches | 0.2 inches | 0.2 inches | 0.6 inches | 0.5 inches |
| Weight | 0.3 lbs | 0.15 lbs | 0.35 lbs | 0.2 lbs | 0.3 lbs |
Reviews & Ratings
S
Sana Gul
4
No issues after installation.
F
Filip Jankovic
4
Works well in mixed memory configurations.
W
Waleed Akram
5
Stable and dependable.
A
Anna Petrova
4
Good value.
Questions & Answers
What are the key specifications of the HPE 16GB 1Rx4 PC4-2666V-R Smart Kit (838081-B21)?
The HPE 838081-B21 Smart Kit offers a 16 GB DDR4 Registered DIMM (RDIMM), single-rank (1Rx4) configuration, PC4-2666V-R speed (2666 MT/s), ECC error correction, and a standard 1.2 V operating voltage.
Is the 838081-B21 kit part of HPE SmartMemory?
Yes. The 838081-B21 is HPE SmartMemory certified, ensuring advanced error handling, performance tuning, and full compatibility with HPE ProLiant and Synergy servers.
Which HPE servers support the 16GB 1Rx4 PC4-2666V-R Smart Kit?
This kit is validated for HPE ProLiant Gen9 and Gen10 rack, tower and blade servers, as well as HPE Synergy compute modules that accept DDR4 PC4-2666V-R RDIMMs.
How many 838081-B21 modules can I install per HPE server?
Most HPE ProLiant Gen10 servers support up to 24 DIMM slots per system; always consult your server’s QuickSpecs for maximum RDIMM population limits.
Can the 838081-B21 module operate at lower memory speeds?
Yes. When installed with slower DIMMs or on legacy platforms, the module will automatically down-clock to the lowest common JEDEC-compliant speed.
Does the HPE 16GB 1Rx4 PC4-2666V-R Smart Kit support ECC?
Yes. The module features full ECC (Error-Correcting Code) support to detect and correct single-bit memory errors, enhancing system reliability.
What installation steps are required for the 838081-B21 Smart Kit?
Power down the server, open the chassis, insert the RDIMM into the correct DIMM slot following the server’s memory population rules, then close the chassis and power on.
Can I mix 838081-B21 modules with non-HPE memory?
Mixing HPE SmartMemory with non-HPE modules is not recommended, as it can disable advanced features, degrade performance, and void warranty support.
What performance improvements can I expect with this Smart Kit?
By leveraging 2666 MT/s speed, ECC, and HPE’s SmartMemory firmware, you benefit from optimized throughput, lower latency, and enhanced fault tolerance.
What does 1Rx4 mean in the context of this memory module?
1Rx4 indicates a single-rank module with a 4-bit data path per DRAM chip, balancing performance and capacity for enterprise server workloads.
What is the HPE spare part number for the 16GB Smart Kit?
The HPE spare part number for this module is 838081-B21, and the HPE product number (SKU) matches for easy identification.
What warranty coverage applies to the 838081-B21 Smart Kit?
HPE SmartMemory modules carry a limited lifetime warranty when used in supported HPE systems, subject to HPE’s warranty terms and conditions.
How can I verify compatibility before purchasing this memory kit?
Consult the HPE ProLiant or Synergy server QuickSpecs or use the HPE Memory Configuration Tool to confirm support for PC4-2666V-R RDIMMs.
How do I order replacement or additional 838081-B21 modules?
Contact an authorized HPE reseller or place an order through the HPE Parts Store using SKU 838081-B21 for genuine SmartMemory modules.
What are the voltage and thermal characteristics of this Smart Kit?
The module operates at 1.2 V with optimized thermal profiles for consistent performance in data-center environments, meeting HPE’s server thermal guidelines.
Does this HPE memory kit support advanced HPE SmartMemory features?
Yes. It supports HPE’s Dynamic Smart Memory enabled by firmware, enabling features like memory failure prediction, power savings and performance optimization.