Replacement for CMX-ES40-4G: Drop-In Alternatives We Stock
Looking for a replacement for the CMX-ES40-4G (CMX-ES40-4G - HP 4GB Memory Kit)? 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 CMX-ES40-4G
| SKU | CMX-ES40-4G |
|---|---|
| Product | CMX-ES40-4G - HP 4GB Memory Kit |
| Current price | $3,145.21 |
| Stock status | In Stock |
| Detail page | View CMX-ES40-4G › |
Drop-in replacements for CMX-ES40-4G
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.
452265-B21 - HP 8GB Kit (2 X 4GB) DDR2-667MHz PC2-5300 Fully Buffered CL5 240-Pin DIMM 1.8V Memory
SKU: 452265-B21
Price: $61.05
379300-B21 - HP 4GB Kit (2 X 2GB) DDR-400MHz PC3200 ECC Registered CL3 184-Pin DIMM 2.5V Memory
SKU: 379300-B21
Price: $71.58
AB454A - HP 4GB Kit (2 X 2GB) DDR2-533MHz PC2-4200 ECC Registered CL4 240-Pin DIMM 1.8V Memory
SKU: ab454a
Price: $71.58
371049-B21 - HP 4GB Kit (2 X 2GB) DDR-333MHz PC2700 ECC Registered CL2 184-Pin DIMM 2.5V Memory
SKU: 371049-B21
Price: $71.58
497767-B21 - HP 8GB Kit (2 X 4GB) DDR2-800MHz PC2-6400 ECC Registered CL6 240-Pin DIMM 1.8V Dual Rank Memory
SKU: 497767-B21
Price: $71.58
466440-B21 - HP 8GB Kit (2 X 4GB) DDR2-667MHz PC2-5300 Fully Buffered CL5 240-Pin DIMM 1.8V Dual Rank Memory
SKU: 466440-B21
Price: $71.58
408853-B21 - HP 4GB Kit (2 X 2GB) DDR2-667MHz PC2-5300 ECC Registered CL5 240-Pin DIMM 1.8V Dual Rank Memory
SKU: 408853-B21
Price: $71.58
Kingston KTH8400/4G 4GB Kit (4 X 1GB) ECC Registered High-Density 278-Pin System Specific DIMM Memory for HP
SKU: KTH8400-4G
Price: $77.63
MY0843S2AV - HP 8GB Kit (2 X 4GB) DDR2-667MHz PC2-5300 Fully Buffered CL5 240-Pin DIMM 1.8V Memory
SKU: MY0843S2AV
Price: $91.14
AM327A - HP 8GB Kit (2 X 4GB) DDR3-1333MHz PC3-10600 ECC Registered CL9 240-Pin DIMM 1.35V Low Voltage Memory
SKU: AM327A
Price: $103.16
A6834A - HP 4GB Kit (4 X 1GB) DDR-266MHz PC2100 ECC Registered CL2.5 184-Pin DIMM 2.5V Memory
SKU: A6834A
Price: $110.53
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.