P61791-B21 HPE 128GB DDR5-4800 ECC RDIMM 4Rx4 1.1V Compatible Memory

  • Part Number: P61791-B21-default
  • Compatible OEM: HPE
  • Capacity: 128GB
  • Speed: DDR5-4800
  • Rank: 4Rx4
  • Form Factor: RDIMM
In Stock – Ships in 3-4 Days
Prices and availability may change and are confirmed on quotation. Last reviewed: 26 March 2026

P61791-B21 HPE 128GB DDR5-4800 ECC RDIMM 4Rx4 1.1V Compatible Memory Specifications

Compatible OEM
HPE
Part Number
P61791-B21-default
Memory Size
128GB
Memory Speed
DDR5-4800
Memory Technology
DDR5
Speed
4800
Rank and Organization
4Rx4
Rank Type
Quad Rank
Chip Organization
x4
Error Correction (ECC)
ECC
CAS Latency
CL40
DIMM Type
Registered
Form Factor
RDIMM
Voltage
1.1V
Pins
288
Height
STD
JEDEC Specification
PC5-38400R
Temperature
0°C to 95°C

HPE doesn’t manufacture memory. They qualify modules from global tier-one OEMs like Samsung, Micron, and SK Hynix—the same trusted brands behind this module.

JEDEC-compliant and spec-matched for HPE systems—ensuring seamless fit, performance, and long-term reliability. All without the HPE label—or the premium that comes with it.

Fully compatible with servers requiring P61791-B21.

Compatible Systems

Why Choose Us?

Your trusted partner for reliable, cost-effective memory solutions

Trusted Memory Brands

Trusted Memory Brands

Genuine Modules from Samsung, Micron & SK hynix

Designed for Compatibility

Designed for Compatibility

Works seamlessly with Dell, HPE, Lenovo & more

Cost-Optimized Value

Cost-Optimized Value

OEM specs without the extra cost

Dedicated Engineering Support

Dedicated Engineering Support

Tailored guidance for your infrastructure

FAQ

How To Order?

1
Add to Quote

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2
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3
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Pricing & lead time in under 2 hours

4
Approve & Pay

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5
We Ship

Typically in 1–7 days

Still have questions about this memory module? Contact us for advice or to request a custom quote for your system.

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