Alternative to WD6400AARS: Better-Value Equivalents in Stock
Comparing the WD6400AARS (WD6400AARS - Western Digital Caviar Green 640GB 5400RPM SATA 3Gb/s 64MB Cache 3.5-inch Hard Drive) against alternatives? Pro Disk Network stocks 12 similar Western Digital parts that offer comparable performance at different price points. Each option below is in-stock, US-warehoused, and tested-and-certified before ship. Bulk pricing is available on quantities of 5+; B2B procurement can use Net 30 with PO.
About the WD6400AARS
| SKU | WD6400AARS |
|---|---|
| Product | WD6400AARS - Western Digital Caviar Green 640GB 5400RPM SATA 3Gb/s 64MB Cache 3.5-inch Hard Drive |
| Current price | $276.07 |
| Stock status | In Stock |
| Detail page | View WD6400AARS › |
Alternatives to WD6400AARS
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.
WD6400AADS-11M2B1 - Western Digital Caviar Green 640GB 5400RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: WD6400AADS-11M2B1
Price: $222.49
WDC6400AARS - Western Digital Caviar Green 640GB 5400RPM SATA 3Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WDC6400AARS
Price: $279.55
WD6400AADS - Western Digital Caviar Green 640GB 5400RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: WD6400AADS
Price: $318.32
WD6400AACS-00M3B0 - Western Digital Caviar Green 640GB 5400RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AACS-00M3B0
Price: $351.99
WD6400AACS-00G8B1 - Western Digital Caviar Green 640GB 5400RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AACS-00G8B1
Price: $367.29
WD6400AADS-00M2B0 - Western Digital Caviar Green 640GB 5400RPM SATA 3Gb/s 32MB Cache 3.5-inch Hard Drive
SKU: WD6400AADS-00M2B0
Price: $417.54
WD6400AACS - Western Digital Caviar Green 640GB 5400RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AACS
Price: $429.83
WD6400AACS-00G8B0 - Western Digital Caviar Green 640GB 5400RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AACS-00G8B0
Price: $444.57
WD6400AACS-00D6B1 - Western Digital Caviar Green 640GB 5400RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AACS-00D6B1
Price: $478.42
WD6400AARS-00Y5B1 - Western Digital Caviar Green 640GB 5400RPM SATA 3Gb/s 64MB Cache 3.5-inch Hard Drive
SKU: WD6400AARS-00Y5B1
Price: $546.53
WD6400AAVS - Western Digital Caviar Green 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AAVS
Price: $235.79
WD6400AAVS-00G9B0 - Western Digital Caviar Green 640GB 7200RPM SATA 3Gb/s 16MB Cache 3.5-inch Hard Drive
SKU: WD6400AAVS-00G9B0
Price: $473.68
How we pick alternatives
Every recommendation above was selected using these criteria:
- Spec parity — capacity, speed, port count, and form factor matched within a 10% tolerance
- Price spread — alternatives shown across the price range, so you can pick on budget
- Brand mix — both OEM-equivalent and trusted aftermarket, all certified
- Reliability data — preferred parts have failure rates below 1% in our 18-month return tracking
- In stock today — shipping today, not 4-6 weeks from now
Want a side-by-side spec comparison?
We can prepare a written comparison covering throughput, power draw, form factor and validated compatibility. Email sales@prodisknetwork.com or call +1 (407) 205-8454 — most quotes ship within 4 business hours.