HPE HP 815101-B21 64GB PC4-21300 DDR4-2666 LRDIMM Smart Server Memory


Product Line:
Server Memory
Memory Type:
Form Factor:
Bus Speed:
PC4-21300 (DDR4-2666)
Capacity Per Module:
64 GB
Total Capacity:
64 GB
Memory Features:
Registered Memory


Used 815101-B21 64GB PC4-21300 DDR4-2666 LRDIMM Smart Server Memory

Most server memory does not work in PC's click here to find out why. Please contact us if you are unsure what memory is right for your needs. 

HP DDR4 SmartMemory delivers great performance, reliability, and efficiency. Our large selection of server memory solutions provides the compatibility, capacity, and bandwidth you need to productively manage your expanding workload with the HP ProLiant Gen9 and Gen10 server, Apollo Family, Synergy, and Blade Systems.

The PE HP 815101-B21 64GB Server SmartMemory is a Load-Reduced DIMM (LRDIMM), an LRDIMM is similar to a registered DIMM (RDIMM) in that it buffers electrical load on the memory controller. However, instead of plugging directly into the parallel memory bus that is connected to the memory controller's processors, the LRDIMM can navigate outside of these restrictions through the use of the Memory Buffer chips. When a server is exclusively configured with LRDIMMs, the memory controllers in the processors automatically shift to Serial Mode - all data, command, and control signals become packetized and transmitted to the Memory Buffer on the LRDIMMs. The Memory Buffer then handles all the Reads and Writes to the DRAM chips. 

LRDIMMs greatly reduce the electrical loading of the DRAM chips onto the memory bus, and through a process called "Rank Multiplication," transform a Quad Rank LRDIMM into a Dual Rank memory module for the memory controller. Through the reduction of the electrical Ranks of the LRDIMM, the server is then able to support LRDIMMs at higher speeds than RDIMMs, and with fewer restrictions on sockets. This means using LRDIMMs you can configure systems with the largest possible memory footprints. If large quantities of RAM are your goal, then using a system full of LRDIMMs RAM can help you achieve twice the capacity for your ProLiant server. 

Substitute PN: 

Compatible With:
HPE Proliant BL Series: BL460c (G10) Blade Servers
HPE Proliant DL Series: DL360 (G10) DL380 (G10) DL560 (G10) DL580 (G10) Rack Servers
HPE Proliant ML Series: ML350 (G10) Tower Server
HPE Proliant XL Series: XL230k (G10) Server

IGS offers a wide array of used heat sinks, refurbished servers, and other used parts and equipment. Contact us now and let us help you find the product you’re looking for! 

Manufacturer:  Hewlett Packard

Manufacturer PN:  815101-B21

Category:  ProLiant Memory

Generation:  PC3-21300

Memory Size: 64GB

Memory Technology:  DDR4 SDRAM

Number of Modules:  1 x 64GB

Memory Speed:  2666MHz

Memory Standard:  DDR4-2666

Signal Processing:  Registered

Form Factor:  288-pin LRDIMM

Error Checking:  ECC