Replacement for 21R7440: Drop-In Alternatives We Stock
Looking for a replacement for the 21R7440 (21R7440 - IBM 512MB DDR-266MHz PC2100 non-ECC Unbuffered CL2.5 184-Pin Memory DIMM Module for SurePOS 4800)? Pro Disk Network ships IBM 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 21R7440
| SKU | 21R7440 |
|---|---|
| Product | 21R7440 - IBM 512MB DDR-266MHz PC2100 non-ECC Unbuffered CL2.5 184-Pin Memory DIMM Module for SurePOS 4800 |
| Current price | $187.72 |
| Stock status | In Stock |
| Detail page | View 21R7440 › |
Drop-in replacements for 21R7440
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.
10k0070 - IBM 512MB PC2100 DDR-266MHz ECC Unbuffered CL2.5 184-Pin DIMM Memory Module Model
SKU: 10K0070
Price: $71.58
4099489 - IBM 512MB DDR-266MHz PC2100 non-ECC Unbuffered CL2.5 184-Pin DIMM Memory Module
SKU: 4099489
Price: $86.50
10K0069 - IBM 512MB DDR-266MHz PC2100 ECC Unbuffered CL2.5 184-Pin DIMM Memory Module
SKU: 10K0069
Price: $111.36
40T4096 - IBM 512MB DDR-266MHz PC2100 ECC Unbuffered CL2.5 184-Pin DIMM Memory Module
SKU: 40T4096
Price: $118.39
41P5990 - IBM 512MB DDR-266MHz PC2100 ECC Unbuffered CL2.5 184-Pin DIMM Memory Module
SKU: 41P5990
Price: $118.39
41P4236 - IBM 512MB DDR-266MHz PC2100 ECC Unbuffered CL2.5 184-Pin DIMM Memory Module
SKU: 41P4236
Price: $118.39
38L4040 - IBM 512MB DDR-266MHz PC2100 ECC Unbuffered CL2.5 184-Pin DIMM Memory Module
SKU: 38L4040
Price: $118.39
10K0075 - IBM 512MB DDR-266MHz PC2100 ECC Unbuffered CL2.5 184-Pin DIMM Memory Module
SKU: 10K0075
Price: $118.39
38L3040 - IBM 512MB DDR-266MHz PC2100 ECC Unbuffered CL2.5 184-Pin DIMM Memory Module
SKU: 38L3040
Price: $118.39
09N4327 - IBM 512MB DDR-266MHz PC2100 ECC Unbuffered CL2.5 184-Pin DIMM Memory Module
SKU: 09N4327
Price: $118.39
41P4829 - IBM 512MB DDR-266MHz PC2100 non-ECC Unbuffered CL2.5 184-Pin DIMM Memory Module
SKU: 41P4829
Price: $187.72
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.