Replacement for 815100-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 815100-B21 (815100-B21 - HP 32GB DDR4-2666 PC4-21300 ECC Registered Dual Rank x4 CL-19 288-Pin 1.2V DIMM Memory Module)? Pro Disk Network ships HP drop-in replacements and equivalent modern parts from US inventory. Every alternate below is in-stock today with same-day shipping for orders placed before 2pm ET. If your unit is still under warranty, contact our engineering team — we offer cross-shipping for B2B customers on Net 30 terms.
About the 815100-B21
| SKU | 815100-B21 |
|---|---|
| Product | 815100-B21 - HP 32GB DDR4-2666 PC4-21300 ECC Registered Dual Rank x4 CL-19 288-Pin 1.2V DIMM Memory Module |
| Current price | $1,349.47 |
| Stock status | In Stock |
| Detail page | View 815100-B21 › |
Drop-in replacements for 815100-B21
Each part below is currently in our US warehouse, ships same-day for orders before 2pm ET, and includes our 90-day warranty. SKUs link to the full product page with photos, datasheets and B2B quote form.
815100-K21 - HP 32GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin RDIMM 1.2V Memory Module
SKU: 815100-K21
Price: $400.00
815100-H21 - HP 32GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin RDIMM 1.2V Memory Module
SKU: 815100-H21
Price: $400.00
HPE 815100-K21#0D1 32GB PC4-21300 DDR4-2666MHz ECC Registered CL19 RDIMM 1.2V Dual-Rank Memory Module
SKU: 815100-K21-0D1
Price: $299.33
815100-S21 - HP 32GB DDR4-2666MHz PC4-21300 ECC-Registered CL19 288-Pin DIMM 1.2V Dual Rank Memory Module
SKU: 815100-S21
Price: $400.00
840758-091 - HP 32GB DDR4-2666 PC4-21300 ECC Registered Dual Rank x4 CL-19 288-Pin 1.2V DIMM Memory Module
SKU: 840758-091
Price: $271.58
850881-001 - HP 32GB DDR4-2666 PC4-21300 ECC Registered Dual Rank x4 CL-19 288-Pin 1.2V DIMM Memory Module
SKU: 850881-001
Price: $331.58
838083-H21 - HP 32GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin RDIMM 1.2V Memory Module
SKU: 838083-H21
Price: $299.33
P05590-K21 - HP 32GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin RDIMM 1.2V Memory Module
SKU: P05590-K21
Price: $299.33
838083-K21 - HP 32GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin RDIMM 1.2V Memory Module
SKU: 838083-K21
Price: $299.33
P05590-H21 - HP 32GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin RDIMM 1.2V Memory Module
SKU: P05590-H21
Price: $299.33
876319-081 - HP 8GB DDR4-2666 PC4-21300 ECC Registered Dual Rank x8 CL-19 288-Pin 1.2V DIMM Memory Module
SKU: 876319-081
Price: $184.21
How we pick replacements
Every recommendation above was selected using these criteria:
- Drop-in compatibility — same form factor (2.5"/3.5", PCIe slot, SFP port, etc.), so it fits the original chassis without modification
- Equivalent or better performance — matched on RPM/IOPS/speed/throughput, never downgraded
- Same-brand-preferred — we list the OEM-equivalent first when available, then trusted aftermarket
- Warranty coverage — 90-day Pro Disk warranty on every part, with 1-year option for B2B
- In stock today — never recommend a part that is on backorder
Need help confirming compatibility?
Our engineers validate every replacement against your specific server, switch, or chassis model before shipment. Email sales@prodisknetwork.com with your platform model (e.g., Dell PowerEdge R740, HP DL380 Gen10, Cisco Catalyst 9300) and we will confirm the exact part number that drops into your hardware.