Western Digital

Western Digital 640 GB Caviar Black SATA 6 Gb/s 7200 RPM 64 MB Cache Bulk/OEM Desktop Hard Drive - WD6402AAEX

Name: Western Digital 640 GB Caviar Black SATA 6 Gb/s 7200 RPM 64 MB Cache Bulk/OEM Desktop Hard Drive - WD6402AAEX
Brand: Western Digital
SKU: B003AJXUTQ

Status: Western Digital 640 GB Caviar Black SATA 6 Gb/s…: Unavailable on Amazon as of 2026-10-18 16:24 UTC. SpecPicks has no in-stock listing with matching specs on file; the search below lists current offers. eBay sellers may still list this model new or used.

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Bottom line: The Western Digital 640 GB Caviar Black SATA 6 Gb/s 7200 RPM 64 MB Cache: 7200 RPM spin speed with 64 MB cache for fast desktop read/write; main trade-off: 7200 RPM mechanical drive, far slower than any modern SSD.

Unavailable on Amazon as of 2026-10-18 16:24 UTC

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By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-18

Mike Perry — Hardware researcher since 2014, focused on GPU performance across gaming, rendering, and local-LLM inference. Synthesises community benchmarks, manufacturer specs, and public forum data into actionable buying guides. About the author →

Pros & Cons

Pros

✓ 7200 RPM spin speed with 64 MB cache for fast desktop read/write
✓ SATA 6 Gb/s interface fits multi-drive workstation builds
✓ 5-year limited warranty backs long-term reliability
✓ StableTrac dual-anchored motor shaft cuts vibration for accurate tracking

Cons

✗ 7200 RPM mechanical drive, far slower than any modern SSD
✗ 640 GB capacity is small by current storage standards
✗ 3.5-inch desktop form factor only, not for laptops
✗ Bulk/OEM packaging ships without mounting screws or SATA cable

Manufacturer description

WD Caviar Black (WD6402AAEX) high performance 3.5-inch SATA hard drives combine 7200 RPM spin speed, 64 MB cache, SATA 6 Gb/s interface, and 640 GB capacity with an integrated dual processor for lightning-fast performance in demanding desktop, workstation, and multi-drive systems. Rock-solid mechanical architecture and enhanced reliability features help protect the drive and the data stored on it. Backed by a 5-year limited warranty.

SpecPicks Verdict

SpecPicks scored Western Digital 640 GB Caviar Black SATA 6 Gb/s 7200 RPM 64 MB Cache… using a rating × review-volume × price-fit model applied to published specs and reviews across the PC & gaming hardware category. Western Digital's PC & gaming hardware lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for PC & gaming hardware of this kind: matching it to an existing build, replacing a failing part, or upgrading from a previous-generation equivalent. Check the spec table below against your current setup — particularly socket / form-factor / power-rating fields — and confirm compatibility on the retailer's listing before purchase. Prices and stock are set by the retailer and may have moved since this page was last updated.

Key Features

WD Caviar Black high performance 3.5- Inch SATA hard drive combines 7200 RPM, 64 MB cache, and SATA 6 Gb/s interface for the ultimate in power computing
High performance electronics architecture features dual processors and bigger, faster caches for maximum read and write speeds.
StableTrac – The motor shaft is secured at both ends to reduce system-induced vibration and stabilize platters for accurate tracking, during read and write operations.
640 GB capacity holds up to 128,000 digital photos, 160,000 MP3 files, and up to 77 hours of HD video.
5 year limited warranty
WD Caviar Black high performance 3.5-inch SATA hard drives combine 7200 RPM spin speed, 64 MB cache

Full Specifications

Brand	Western Digital
Cache Size	64
Form Factor	desktop
Model Number	WD6402AAEX
Mfr Part Number	WD6402AAEX
Vibration/Rumble	Yes
Hardware Platform	PC
Compatible Devices	Windows 7/Vista/XP/2000, Mac and Linux operating systems.
Data Transfer Rate	6 gigabits_per_second
Warranty Description	5 year limited warranty
Customer Package Type	Standard Packaging
Hard Disk Description	desktop
Hardware Connectivity	SATA 6.0 Gb/s
Connectivity Technology	SATA
Digital Storage Capacity	6 GB
Specific Uses For Product	Personal
Hard Disk Rotational Speed	7200 rpm
Cache Memory Installed Size	64
Global Trade Identification Number	08032976069325

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