Replacement for 881901-B21: Drop-In Alternatives We Stock
Looking for a replacement for the 881901-B21 (881901-B21 - HP 64GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin LRDIMM 1.2V 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 881901-B21
| SKU | 881901-B21 |
|---|---|
| Product | 881901-B21 - HP 64GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin LRDIMM 1.2V Memory Module |
| Current price | $709.63 |
| Stock status | In Stock |
| Detail page | View 881901-B21 › |
Drop-in replacements for 881901-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.
815101-H21 - HP 64GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin LRDIMM 1.2V Memory Module
SKU: 815101-H21
Price: $531.58
815101-K21 - HP 64GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin LRDIMM 1.2V Memory Module
SKU: 815101-K21
Price: $709.63
838085-H21 - HP 64GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin LRDIMM 1.2V Memory Module
SKU: 838085-H21
Price: $709.63
P05592-K21 - HP 64GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin RDIMM 1.2V Memory Module
SKU: P05592-K21
Price: $897.38
P05642-1A1 - HP 64GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin RDIMM 1.2V Memory Module
SKU: P05642-1A1
Price: $897.38
P05592-H21 - HP 64GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin RDIMM 1.2V Memory Module
SKU: P05592-H21
Price: $897.38
850882-001 - HP 64GB DDR4-2666 PC4-21300 ECC Registered Quad Rank x4 CL-19 288-Pin Load Reduced 1.2V DIMM Memory Module
SKU: 850882-001
Price: $615.79
815101-B21 - HP 64GB DDR4-2666 PC4-21300 ECC Registered Quad Rank x4 CL-19 288-Pin Load Reduced 1.2V DIMM Memory Module
SKU: 815101-B21
Price: $2,542.11
840759-091 - HP 64GB DDR4-2666 PC4-21300 ECC Registered Quad Rank x4 CL-19 288-Pin Load Reduced 1.2V DIMM Memory Module
SKU: 840759-091
Price: $2,542.11
815102-H21 - HP 128GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin LRDIMM 1.2V Memory Module
SKU: 815102-H21
Price: $167.05
867853-B21 - HP 8GB DDR4-2666 MHz PC4-21300 ECC Registered CL19 288-Pin DIMM 1.2V Single Rank Memory Module
SKU: 867853-B21
Price: $176.84
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.