Replacement for WD640AADS: Drop-In Alternatives We Stock
Looking for a replacement for the WD640AADS (WD640AADS - Western Digital 640GB 7200RPM SATA Hard Drive)? Pro Disk Network ships Western Digital 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 WD640AADS
| SKU | WD640AADS |
|---|---|
| Product | WD640AADS - Western Digital 640GB 7200RPM SATA Hard Drive |
| Current price | $684.97 |
| Stock status | In Stock |
| Detail page | View WD640AADS › |
Drop-in replacements for WD640AADS
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.
WD6400AAKS - Western Digital Caviar Blue 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AAKS
Price: $110.53
WD6400AAKS-22A7B0 - Western Digital Caviar Blue 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AAKS-22A7B0
Price: $110.53
WD6400AAKS-41H2B0 - Western Digital Caviar Blue 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AAKS-41H2B0
Price: $157.07
WD6400AAKS-75A7B2 - Western Digital Caviar Blue 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AAKS-75A7B2
Price: $171.03
WD6400AAKS-75A7B0 - Western Digital Caviar Blue 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AAKS-75A7B0
Price: $182.37
WD6401AALS - Western Digital Caviar Black 640GB 7200RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: WD6401AALS
Price: $189.47
WD6400AAKS-65A7B2 - Western Digital Caviar Blue 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AAKS-65A7B2
Price: $195.79
WD6400AALS - Western Digital 640GB 7200RPM SATA 3Gb/s 3.5-inch Hard Drive
SKU: WD6400AALS
Price: $198.16
WD6402AAEX - Western Digital Caviar Black 640GB 7200RPM SATA 6Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD6402AAEX
Price: $205.26
WD6400AAKS-40H2B1 - Western Digital Caviar Blue 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AAKS-40H2B1
Price: $211.00
WD6400AAKS-65Z7B0 - Western Digital Caviar Blue 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AAKS-65Z7B0
Price: $211.00
WD6400AAKS-00A7B0 - Western Digital Caviar Blue 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AAKS-00A7B0
Price: $223.05
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.