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High-capacity PCIe RI card with consistent reads.
877831-B21
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HPE 4TB PCIe x4 RI HH DS Card
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877831-B21
- Description:
- HPE 4TB PCIe x4 RI HH DS Card
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877831-B21 Overview
877831-B21 is a high-performance HDD engineered for reliability and continuous operation. This drive features a 3.5-inch form factor with a SATA III interface and a robust 7200 RPM spindle speed that supports a storage capacity of 4 TB. It is equipped with a 128 MB buffer, is rated for an annual workload of 180 TB/yr, and boasts an MTBF of 1,200,000 hours, ensuring dependable data storage for demanding environments.
877831-B21 is designed for versatile usage across desktop, server, NAS, and surveillance applications. It maintains optimized power consumption with a read/write usage of 6.8 Watts and an idle consumption of 4.5 Watts, while advanced features such as helium-sealed construction, vibration protection, and dual actuator technology enhance its performance in multi-bay and continuous operation scenarios. Common use cases include data centers, enterprise desktops, NAS storage systems, and surveillance solutions.
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877831-B21 Specifications
- Product Type
- Hard Drive
- Drive Type
- HDD
- Use Case
- Desktop / Server / NAS / Surveillance / Enterprise Storage
- Interface
- SATA III
- Form Factor
- 3.5-inch
- Storage Capacity
- 4 TB
- Spindle Speed (RPM)
- 7200 RPM
- Cache (Buffer Size)
- 128 MB
- Average Latency
- N/A
- Data Transfer Rate
- Up to 210 MB/s
- Annual Workload Rating
- 180 TB/yr
- Power Consumption (Read/Write)
- 6.8 Watts
- Power Consumption (Idle)
- 4.5 Watts
- Encryption Support
- AES 256-bit
- Helium Sealed
- Helium-Sealed
- Drive Bays Supported
- Multi-bay
- Vibration Protection
- Yes
- Advanced Features
- Dual Actuator
- Operating Temperature
- 5–60°C
- Product Name
- 877831-B21 4TB Enterprise SATA HDD
- Height
- 1.03 inches
- Width
- 5.79 inches
- Depth
- 8.10 inches
- Weight
- 1.2 lbs
877831-B21 Use Case
High-Throughput OLTP Database Acceleration
In a global retail environment running Oracle or SQL Server on HPE ProLiant servers, the 877831-B21 HPE 4TB PCIe x4 RI HH DS Card delivers sub-millisecond latency and 500K+ IOPS for read-intensive workloads. By offloading hot data to NVMe flash, organizations gain 60% faster query response, 45% higher transaction throughput and consistent peak-period performance—driving real-time customer experiences and maximizing ROI on database infrastructure.
VDI Boot-Storm Optimization for Enterprise Desktops
During morning log-on surges in Citrix or VMware Horizon deployments, the 877831-B21 HPE 4TB PCIe x4 RI HH DS Card caches OS and application images directly on HPE ProLiant hosts. This accelerates simultaneous desktop boots by 65%, reduces network traffic by 50% and virtually eliminates IO bottlenecks. End users enjoy near-instant launch times while IT teams lower storage contention and TCO.
Real-Time Big Data Analytics and AI Model Training
Data science teams processing streaming IoT or clickstream data on HPE Apollo or ProLiant servers leverage the 877831-B21 HPE 4TB PCIe x4 RI HH DS Card as a high-speed scratch tier for Apache Spark, Kafka and TensorFlow pipelines. Delivering sustained throughput above 3 GB/s, it cuts ETL and model-training runtimes by up to 40%, enabling faster insights, shorter development cycles and competitive advantage in AI-driven markets.
Quality Certifications
To get the detailed certification, please go to the Compliance Center.
Product Comparison Table 
| 877831-B21 |  Q2P85A |  765034-B21 |  868830-B21 |  791034-B21 | |
|---|---|---|---|---|---|
| Product Type | Hard Drive | Hard Drive | Hard Drive | Hard Drive | Hard Drive |
| Drive Type | HDD | HDD | HDD | HDD | HDD |
| Use Case | Desktop / Server / NAS / Surveillance / Enterprise Storage | Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage | Desktop / Server / NAS / Surveillance / Enterprise Storage |
| Interface | SATA III | SAS 12Gb/s | SATA III | SATA III | SATA III |
| Form Factor | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch | 3.5-inch |
| Storage Capacity | 4 TB | 14 TB | 10 TB | 8 TB | 4 TB |
| Spindle Speed (RPM) | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM | 7200 RPM |
| Cache (Buffer Size) | 128 MB | 256 MB | 256 MB | 256 MB | 256 MB |
| Average Latency | N/A | N/A | N/A | N/A | N/A |
| Data Transfer Rate | Up to 210 MB/s | Up to 250 MB/s | Up to 250 MB/s | Up to 210 MB/s | Up to 210 MB/s |
| Annual Workload Rating | 180 TB/yr | 550 TB/yr | 550 TB/yr | 550 TB/yr | 550 TB/yr |
| Power Consumption (Read/Write) | 6.8 Watts | 8.5 Watts | 8W | 7.8 Watts | 8 Watts |
| Power Consumption (Idle) | 4.5 Watts | 6.5 Watts | 6W | 5.2 Watts | 5 Watts |
| Encryption Support | AES 256-bit | AES 256-bit | AES 256-bit | No | AES 256-bit |
| Helium Sealed | Helium-Sealed | Helium-Sealed | Helium-Sealed | Helium-Sealed | No |
| Drive Bays Supported | Multi-bay | Multi-bay | Multi-bay | Multi-bay | Multi-bay |
| Vibration Protection | Yes | Yes | Yes | Yes | Yes |
| Advanced Features | Dual Actuator | Dual Actuator | Dual Actuator | Dual Actuator | Dual Actuator |
| Operating Temperature | 5–60°C | 5–60°C | 5–60°C | 5–60°C | 5–60°C |
| Product Name | 877831-B21 4TB Enterprise SATA HDD | Q2P85A Enterprise Helium-Sealed HDD | 765034-B21 10TB Enterprise HDD | 868830-B21 Enterprise HDD | 791034-B21 Enterprise HDD |
| Height | 1.03 inches | 1.03 inches | 1 in | 1.03 inches | 1.03 inches |
| Width | 5.79 inches | 4 inches | 4 in | 5.79 inches | 4.01 inches |
| Depth | 8.10 inches | 5.79 inches | 5.8 in | 4 inches | 5.79 inches |
| Weight | 1.2 lbs | 1.8 lbs | 1.8 lbs | 2.1 lbs | 2.1 lbs |
Reviews & Ratings
Z
Zara Nadeem
4
Great for analytics workloads. No issues so far.
T
Tomasz Kowalczyk
5
Reliable HH card with predictable performance.
U
Usman Latif
4
Easy deployment and stable throughput.
N
Neil Robertson
5
Delivers solid PCIe read acceleration.
Questions & Answers
What is the HPE 877831-B21 4TB PCIe x4 RI HH DS Card?
The HPE 877831-B21 is a 4TB NVMe solid-state drive on a PCIe Gen3 x4 riser card in half-height, half-length form factor designed for HPE ProLiant servers.
What storage capacity does the 877831-B21 card offer?
It provides 4TB of high-performance NVMe storage, ideal for data-intensive applications and caching.
What interface and form factor does this card use?
It uses a PCIe Gen3 x4 interface and fits HPE riser slots in half-height, half-length (HH-HL) server bays.
Which HPE ProLiant servers are compatible with SKU 877831-B21?
The card is validated for HPE ProLiant Gen9, Gen10, and select Gen11 DL and ML series servers with available PCIe riser slots.