Replacement for 40U6420: Drop-In Alternatives We Stock
Looking for a replacement for the 40U6420 (40U6420 - IBM 4GB DDR-400MHz PC3200 ECC Registered CL3 184-Pin DIMM Very Low Profile (VLP) Memory Module)? 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 40U6420
| SKU | 40U6420 |
|---|---|
| Product | 40U6420 - IBM 4GB DDR-400MHz PC3200 ECC Registered CL3 184-Pin DIMM Very Low Profile (VLP) Memory Module |
| Current price | $376.37 |
| Stock status | In Stock |
| Detail page | View 40U6420 › |
Drop-in replacements for 40U6420
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.
39M5852 - IBM 4GB Kit (2 X 2GB) DDR-400MHz PC3200 ECC Registered CL3 184-Pin DIMM Very Low Profile (VLP) Memory
SKU: 39M5852
Price: $71.58
40D2916 - IBM 4GB Kit (2 X 2GB) DDR-400MHz PC3200 ECC Registered CL3 184-Pin DIMM Memory
SKU: 40D2916
Price: $164.58
73P5122 - IBM 4GB Kit (2 X 2GB) DDR-400MHz PC3200 ECC Registered CL3 184-Pin DIMM 2.5V Memory
SKU: 73P5122
Price: $164.58
39M5908 - IBM 4GB Kit (2 X 2GB) DDR-400MHz PC3200 ECC Registered CL3 184-Pin DIMM Memory
SKU: 39M5908
Price: $164.58
73P3235 - IBM 4GB Kit (2 X 2GB) DDR-400MHz PC3200 ECC Registered CL3 184-Pin DIMM Memory
SKU: 73P3235
Price: $164.58
39M5806 - IBM 4GB Kit (2 X 2GB) DDR-400MHz PC3200 ECC Registered CL3 184-Pin DIMM Memory
SKU: 39M5806
Price: $164.58
39M5854 - IBM 4GB DDR-400MHz PC3200 ECC Registered CL3 184-Pin DIMM 2.5V Memory Module
SKU: 39M5854
Price: $168.42
43X6016 - IBM 4GB DDR-400MHz PC3200 ECC Registered CL3 184-Pin DIMM Memory Module
SKU: 43X6016
Price: $376.37
38L5913 - IBM 4GB DDR-400MHz PC3200 ECC Registered CL3 184-Pin DIMM 2.5V Dual Rank Memory Module
SKU: 38L5913
Price: $376.37
43X5008 - IBM 4GB DDR-400MHz PC3200 ECC Registered CL3 184-Pin DIMM 2.5V Memory Module
SKU: 43X5008
Price: $376.37
Dataram DRI326/8GB 8GB Kit (2 X 4GB) DDR-400MHz PC3200 ECC Registered CL3 184-Pin DIMM Memory for IBM eServer 326
SKU: DRI326-8GB
Price: $588.58
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.