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815100-B21 HPE 32GB (1x32GB) Dual Rank x4 DDR4-2666 CAS-19-19-19 Registered Smart Memory Kit (HPE Assembly #: 840758-091)

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In Stock: Qty 267
5 Years


Price: $119.00
Today's Price: $85.00
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Product Overview

This item, 815100-B21, is the HPE option part number for the product described as 32GB (1x32GB) Dual Rank x4 DDR4-2666 CAS-19-19-19 Registered Smart Memory Kit. Further details below.

HPE memory option 815100-B21 is a DRAM module for use in certain HPE ProLiant Gen10 servers. This is genuine HPE memory. This is NOT third party or generic memory. A sampling of compatible machines is found below but that list not necessarily complete. Feel free to contact us to verify compatibility with your machine. The 815100-B21 memory is a 288-pin DIMM form factor, and has a capacity of 32 gigabytes. This memory is PC4-21300, with a speed of 2666 Mhz. This memory is one of our most popular products. Please note that this is Registered memory, which cannot be mixed in the same server as Unbuffered memory.

815100-B21 is the option part number used by HPE to reference this memory, but that part number won't appear anywhere on the module. The HPE assembly number of 840758-091 will be visible on the label on the module.

Related Resources:

HPE Option Part #: 815100-B21
HPE Spare Part #: 850881-001

HPE Assembly Part #: 840758-091


  • Type: DRAM
  • Product Type: Memory module
  • Form Factor: DIMM 288-pin
  • Technology: DDR4 SDRAM
  • Storage Capacity: 32 GB
  • Registered or Buffered: Registered
  • Data Integrity Check: ECC
  • Module Configuration: 4096 x 72
  • Chips Organization: X4
  • Memory Speed: 2666 megahertz
  • Memory Specification Compliance: PC4-21300
  • Supply Voltage: 1.2 volt
  • CAS Latency: CL19
  • Latency Timings: 19-19-19
  • RAM Features: Dual rank

Compatible with:
BL460c Gen10 (1st Gen CPU)
DL360 Gen10 (1st Gen CPU)
DL380 Gen10 (1st Gen CPU)
DL560 Gen10 (1st Gen CPU)
DL580 Gen10 (1st Gen CPU)
ML110 Gen10 (1st Gen CPU)
ML350 Gen10 (1st Gen CPU)
✅ XL170r Gen10 (1st Gen CPU)
✅ XL190r Gen10 (1st Gen CPU)
✅ XL230k Gen10 (1st Gen CPU)
✅ and possibly others
Contact us via Live Chat if you have any questions about compatibility.

Last updated: 9/22/2023

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(9 reviews) Write a Review

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  • 5

    Posted by Jace Russell on Feb 12, 2023

    My purchase arrived earlier than expected, and I'm thrilled with the speedy delivery.

  • 5
    Good website

    Posted by Steven Alexander on Apr 05, 2022

    The website's design is top-notch, and the user interface is smooth. It's evident that they put effort into making it customer-friendly.

  • 5
    5 stars!

    Posted by Jaliyah Murphy on Dec 19, 2021

    The knowledgeable staff provided helpful recommendations, and I'm happy with the products I chose.

  • 5
    5 stars

    Posted by Remy Cox on Sep 01, 2021

    I want to express my gratitude for the outstanding customer support. They made me feel valued and heard.

  • 5
    The best

    Posted by James Westfall on Aug 30, 2021

    The pricing was competitive and the service was A+++

  • 5
    Favorite supplier

    Posted by Paul Richards on Aug 10, 2021

    Global One Tech always has what we need in stock at a good price. Fast shipping!

  • 5
    No problems

    Posted by Troy W on Jul 28, 2021

    Good product, good price, great service

  • 5
    Very good

    Posted by Michael Smith on Jul 20, 2021

    My purchase arrived faster than I expected, and I'm impressed by the efficiency of the shipping process. Kudos to the team for their promptness!

  • 5
    5 stars

    Posted by Byron Parker on Jun 07, 2021

    The website's layout is so well-organized, making it a breeze to browse through the products.


This product is warrantied against hardware failure for a period of 5 Years from the date of purchase.

It is the customer's responsibility to verify compatibility with their machine(s) before placing an order. If an item is ordered by mistake, it can be returned for refund, minus a 25% restocking fee, within 5 business days of receipt. The cost of freight is not refundable.

If you have a defective part and the machine to which it was installed is still in the HPE warranty period, please execute the warranty exchange by visiting the link below. (Please have the serial numbers of the defective drive and your server/storage array handy)
HPE Enterprise Support Center

In the event of hardware becoming defective during the Global One warranty period, but the HPE warranty has expired, the product can be returned to us for a working replacement. Customers are responsible for the shipment of returned merchandise, Global One will bear the expense for Ground/Economy shipment of the replacement item(s).

* Factory sealed equipment can only be returned unopened.

To request an RMA, please complete and submit the form found here: 
RMA Request Form