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Western Digital WD Black WD6402AAEX 640GB 7200 RPM 64MB Cache SATA 6.0Gb/s 3.5" Internal Hard Drive Bare Drive

  • 7200 RPM 64MB Cache
  • SATA 6.0Gb/s
  • 5 years limited
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As WD’s top-of-the-line 7200 RPM high-capacity desktop drive, the Caviar Black combines a high performance electronics architecture with a rock solid mechanical architecture to deliver the perfect storage solution for your fully-loaded PC or maxed out gaming machine. Cool drive operation, no-touch head technology, and leading-edge vibration protection ensure enhanced reliability and sustained data throughput.

  • newegg NoTouch Ramp Load Technology The recording head never touches the disk media ensuring significantly less wear to the recording head and media, as well as better drive protection in transit.
  • newegg High Performance Electronics Architecture The electronics architecture of WD Caviar Black 640GB SATA 6Gb/s drive employs dual processor - twice the processing power, and 64 MB colossal cache to maximize performance.
  • newegg IntelliSeek Technology WD’s IntelliSeek technology proactively calculates an optimum seek speed to eliminate hasty movement of the actuator, resulting in lower power consumption, noise and vibration.
  • newegg SATA 6Gb/s Interface SATA 6Gb/s (SATA Revision 3.0) provides twice the bus bandwidth of SATA 3Gb/s (SATA II) along with enhancements including a new Native Command Queuing (NCQ) and improved power management capabilities. SATA 6Gb/s uses the same connector as SATA 3Gb/s and is compatible with Microsoft Windows 7/Vista/XP/2000 and Mac OS X.

Learn more about the Western Digital WD6402AAEX

Quick Info


  • Limited Warranty period (parts): 5 years
  • Limited Warranty period (labor): 5 years

Customer Reviews of the Western Digital WD6402AAEX

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  • Craig W.
  • 12/9/2013 11:05:14 AM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

2 out of 5 eggsWorked for me

Pros: -Still works after 3+ years

Cons: -Loud (been asked if I was playing in a server room)
-Gets extremely hot

Manufacturer Response:

Dear Customer, we apologize for any inconvenience. There are many variables that could amount to a drive emitting unusual sounds when powered on. To verify that there are no problems with your drive, we have our Data Lifeguard Diagnostics for Windows (WinDLG) utility, and Mac users can of course use Disk Utility and First Aid. For information on how to use the WinDLG utility, please view the information provided by the following link.

How to tell if the noise or sound the drive is making is normal

How to test a drive for problems using Data Lifeguard Diagnostics for Windows

How to test a drive for defects or problems on a Mac

If you have any other questions or doubts, please contact us at 1 (800) 275-4932, or via our support website at: Our World-Class Customer Service will gladly address any possible concerns you may have.

Did you find this review helpful? Yes No

  • Peyton W.
  • 8/27/2013 7:16:23 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

3 out of 5 eggsDrive failed after 3 years

Pros: Did it's thing for 3 years till yesterday

Cons: Drive started failing after a fresh windows install. Well a few scans confirmed bad sectors. Luckily I saved any important information before it went downhill.

Other Thoughts: Drive worked proper for a decent time period, just goes to show that you get what you pay for... My eye is on a 1TB ssd.

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  • JOHN C.
  • 11/18/2012 1:37:54 PM
  • Tech Level: Somewhat High
  • Ownership: more than 1 year
  • Verified Owner

4 out of 5 eggsDrive Failure

Pros: Fast, Quiet.

Cons: Drive Died after 14 months

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  • Garrett G.
  • 8/4/2012 12:06:10 AM
  • Tech Level: High
  • Ownership: more than 1 year
  • Verified Owner

2 out of 5 eggsworks ok at best

Pros: cheap very cheap best GB/dollar ratio at time of purchase

Cons: HDD went belly up within 2 years of use went in and out causing crashes luckily i could pull all info off it before it died completely

Other Thoughts: Makes an excallent paper weight speeds supposed to be greater then with WD green but i noticed no improvement

Manufacturer Response:

We appreciate your feedback and apologize for any inconvenience you may have experienced with the WD Black, as this is not the typical experience with the product.
We are very sorry to hear that your drive failed after 2 years of use. Western Digital does rigorously test and verify all of our drives, prior to shipping, with burn-in and diagnostic tests. This helps us maintain our annualized failure rate at below 0.8%.
Please be assured that we will stand by our warranty policy and replace your drive for you. Follow the links below for more information.
How to get an RMA (Return Merchandise Authorization) or replace a defective product under warranty
For helpful information on the proper handling of your drives please visit the following link.
We would appreciate the opportunity to further assist you, and resolve any further concerns you may have with the device and/or your experience. You may contact us at 1 (800) 275-4932, or via our support website at: Please indicate within the online case creation or with the first support agent you speak with, that you are responding to a Newegg review, so we route you and your information to the correct team members.

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  • Caleb O.
  • 6/25/2012 9:26:46 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsDoes what it's supposed to do.

Pros: No problems with it, very fast considering it's a HDD. Gets 5.9 Windows rating.

Cons: Don't know if it's the HDD or something with my Windows installation as it used to boot a lot faster, but Windows has been having semi-slow boots lately but nothing too bad.

Other Thoughts: For the price, get one.

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  • Wayne C.
  • 5/24/2011 12:31:26 PM
  • Tech Level: High
  • Ownership: 1 month to 1 year
  • Verified Owner

5 out of 5 eggsAll 8 drives installed and running great

Pros: Uneventful installation. Performance as expected. Very quiet.

Cons: None.

Other Thoughts: Watch out for drive sizes when building RAIDs. Although the shipped drives were all the same model numbers, the number of blocks varied slightly which caused issues when we swapped in a unit that had just a few less blocks. Technically we weren't short a few blocks, the drives that initially formed the RAID had a few extra. We made sure we used a calculated drive size that should fit in the future.

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  • Joseph V.
  • 5/22/2011 11:22:01 PM
  • Tech Level: Somewhat High
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggs^^kr @p^^

Pros: - has Western Digital's name on it
- looks shiny and fit in the Cooler Master case properly
- BIOS recognized the drive as a WDxxx until it gave up talking to the m/b
- Win 7 Ultimate 64-bit installed on the Intel SSD after the WD was unplugged

Cons: - Never worked
- Clicking noises on spin-up attempts with all connections

Other Thoughts: Thank goodness I bought an Intel 510 SSD at the same time I bought this or else I'd be up a creek. WD CB's are the only type of mechanical hard drives I buy, but after this I'm going to have to reconsider my position.

Verified SATA-III ports working properly along with using different SATA-III cables. All failed to motivate this inferior drive into working. This drive is such junk that Newegg deactivated it. I'm glad they were proactive, I just wish they would have thought of it before I bought one. Let's see if Newegg steps up to the RMA plate and handles this appropriately,..

Intel Core i7 2600k
ASRock P67 Extreme6
Corsair Vengeance 2x4GB
Xigmatek Gaia (HDT-S1283)
Intel 510 SATA-III SSD
XX WD Caviar Black 640GB, 64MB cache XX
Corsair TX-750 PSU
Cooler Master 534+

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  • Cecil S.
  • 5/20/2011 11:59:36 AM
  • Tech Level: High
  • Ownership: 1 week to 1 month
  • Verified Owner

1 out of 5 eggsHDD died

Pros: NONE

Cons: This hard drive was sluggish from the beginning. It then died completely in less than 30 days. Do not purchase this drive. I bought a Seagate Barracuda XT locally and am well pleased now.

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  • David G.
  • 5/18/2011 4:24:08 PM
  • Tech Level: High
  • Ownership: 1 day to 1 week
  • Verified Owner

1 out of 5 eggsWD6402AAEX - two bad hard drives

Pros: none

Cons: I purchased two WD640GB SATA III hard drives. One hard drive was dead on arrival (DOA) and the other was so unstable that it couldn't be used. Both hard drives were RMA'd. Don't by this hard drive if you plan on running SATA III. I am using a ASUS P8P67 motherboard version 3.0

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  • Erik S.
  • 5/18/2011 6:30:15 AM
  • Tech Level: Somewhat High
  • Ownership: 1 month to 1 year
  • Verified Owner

2 out of 5 eggsStutters during real-time sequential writes

Pros: Overall throughput seems high. Both drives I ordered together have worked fine with daily use for 2+ months.

Cons: I bought two drives for sequential writes of real-time data over a SATA3 connection. They both stutter during the writes at fairly consistent intervals, with audible drive noise. This happens with empty drives. The same write to my 32 MB buffer, 7200 rpm, SATA2 drives have no problems keeping up with the same data rate. This seems to happen regardless of how much is already written to the drive.

Both drives are going to go to an eSATA RAID 1 for backups..

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