Replacement for A9781931: Drop-In Alternatives We Stock
Looking for a replacement for the A9781931 (A9781931 - Dell 128GB PC4-21300 DDR4-2666MHz ECC Registered CL19 LRDIMM 1.2V Octa-Rank Memory Module)? Pro Disk Network ships Dell 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 A9781931
| SKU | A9781931 |
|---|---|
| Product | A9781931 - Dell 128GB PC4-21300 DDR4-2666MHz ECC Registered CL19 LRDIMM 1.2V Octa-Rank Memory Module |
| Current price | $1,486.32 |
| Stock status | In Stock |
| Detail page | View A9781931 › |
Drop-in replacements for A9781931
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.
370-ADMX - Dell 128GB PC4-21300 DDR4-2666MHz ECC Registered CL19 Load Reduced LRDIMM 1.2V Octa-Rank Memory Module
SKU: 370-ADMX
Price: $1,486.32
370-ADPD - Dell 128GB PC4-21300 DDR4-2666MHz ECC Registered CL19 Load Reduced LRDIMM 1.2V Octa-Rank Memory Module
SKU: 370-ADPD
Price: $1,486.32
370-AESZ - Dell 128GB DDR4-2666MHz PC4-21300 ECC Registered CL19 288-Pin LRDIMM 1.2V Octal Rank Memory Module
SKU: 370-AESZ
Price: $1,486.32
A9810565 - Dell 128GB PC4-21300 DDR4-2666MHz ECC Registered CL19 LRDIMM 1.2V Octa-Rank Memory Module
SKU: A9810565
Price: $2,473.92
Dell SNP917VKC/128G 128GB PC4-21300 DDR4-2666MHz ECC Registered CL19 Load Reduced LRDIMM 1.2V Octa-Rank Memory Module
SKU: SNP917VKC-128G
Price: $2,473.92
Dell SNP2WMMMC/32G 32GB PC4-21300 DDR4-2666MHz ECC Registered CL19 Load Reduced LRDIMM 1.2V Dual-Rank Memory Module
SKU: SNP2WMMMC-32G
Price: $397.58
A9723936 - Dell 32GB PC4-21300 DDR4-2666MHz ECC Registered CL19 LRDIMM 1.2V Dual-Rank Memory Module
SKU: A9723936
Price: $397.58
A9810564 - Dell 64GB PC4-21300 DDR4-2666MHz ECC Registered CL19 LRDIMM 1.2V Quad-Rank Memory Module
SKU: A9810564
Price: $524.21
370-ADNH - Dell 64GB DDR4-2666MHz PC4-21300 ECC Registered CL19 288-Pin DIMM 1.2V Quad Rank LRDIMM Memory Module
SKU: 370-ADNH
Price: $629.47
A9781930 - Dell 64GB PC4-21300 DDR4-2666MHz ECC Registered CL19 LRDIMM 1.2V Quad-Rank Memory Module
SKU: A9781930
Price: $629.47
4JMGM-A - Dell 64GB PC4-21300 DDR4-2666MHz ECC Registered CL19 LRDIMM 1.2V Quad-Rank Memory Module
SKU: 4JMGM-A
Price: $667.47
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.