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Western Digital Caviar Green (WD30EZRX) 3 TB Desktop Hard Disk Drive Review
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Armed with dual processors, a fast 64 MB cache and the new SATA 6 Gbps interface, the improved 3 TB Western Digital Caviar Green (WD30EZRX) is the latest iteration of Western Digital's venerable eco-friendly desktop hard disk drives to feature higher-density 750 GB platters, and one of the few hard disk drives in the world capable of delivering more than 2.1 TB of storage.

With a higher spindle speed of around 6,600 RPM, this drive is faster than its 3 Gbps cousin, the original WD30EZRSDTL. That improved performance comes at the cost of higher power consumption and thermal output although it's a small price to pay to make up for the performance sapping effect of the drive's AFT emulation mode.

Like all newer Western Digital high-capacity hard disk drives, this model supports the Western Digital-pioneered Advanced Format Technology (AFT). However, this is not full-fledged AFT drive as it still uses 512-byte emulation for compatibility reasons, and therefore appears to be a regular hard disk drive to the outside world. Due to the use of an emulation mode, there are performance ramifications, of course. You can read all about it here - The Western Digital Advanced Format Performance Comparison Guide.

Thanks to the boost in spindle speed and to a much smaller degree, the faster SATA 6 Gbps interface; the new Western Digital WD30EZRX is now one of the fastest Caviar Green models, losing out only to the non-AFT 2 TB Caviar Green. This makes the WD30EZRX the obvious choice if you want a 3 TB hard disk drive, even if you don't have a SATA 6 Gbps controller.

Before you buy a Western Digital WD30EZRX though, please note that it will only work with the new UEFI-based motherboards and even then, it will not support older operating systems like Microsoft Windows XP. The Western Digital WD30EZRX is also more than twice as expensive as the 2 TB Western Digital Caviar Green. Obviously, Western Digital decided that there should be a price premium for a drive that, for the moment, has no competitor.

To learn how to properly install this 3 TB hard disk drive in Microsoft Windows Vista, click here!

For the lowest current prices on Western Digital Caviar Green hard disk drives, click here!


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Western Digital WD30EZRX Overview


Introduction, Packaging


The Improved 3 TB WD Caviar Green
Usable Capacity, Specifications


Connectors & Jumpers, Breather Holes


Testing The Improved 3 TB Caviar Green


Maximum Surface Temperature
Platter Transfer Rate Profile


WinBench 99 Test Results
Transfer Rate Range


IO Meter Random Access Performance


IO Meter Sequential Access Performance


IOPS Scaling (Random Access)


IOPS Scaling (Sequential Access)




Questions & Comments

Please feel free to post your questions or comments here!

Date Revision Revision History



Comprehensive review release.



Updated the Packaging section with clarification from Western Digital about the HighPoint Rocket 620 controller.
Removed the HighPoint Rocket 620 Controller section.
Updated the Conclusion.

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