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Manufacturer Warranty
Beyond any applicable Newegg return policy, this item is warranted independently by the product's Manufacturer. Below is a summary provided for convenience only and may not be accurate or current.
Use this link for full details.
- Manufacturer Limited Warranty period (parts): 3 years
- Manufacturer Limited Warranty period (labor): 3 years
Manufacturer Contact Info
Return Policies
This item is covered by Newegg.com's Standard Return Policy.
- Return for refund within: 30 days
- Return for replacement within: 30 days
- Restocking Fee: Yes
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The Western Digital Caviar Green 640GB Hard Drive uses less power and support quieter, cooler-running desktop PCs. Its breakthrough 16 MB cache makes this hard drive suitable for high-performance home and business computing, as it can handle high-end data-intensive and multimedia applications.
This hard drive incorporates WD’s GreenPower technology, which yields lower operating temperatures and low acoustics, best for ultra-quiet PCs and external drives use. The IntelliPower delivers a fine-tuned balance of spin speed, transfer rate and caching algorithms; IntelliSeek Calculates optimum seek speeds; and IntelliPark automatically unload the heads during idle. All the features help the drive to operation in lower power consumption and reduced noise environment.
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- 5
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- 74%
- 4
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- 13%
- 3
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- 3%
- 2
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- 2%
- 1
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- 8%
| Product Rating: |
 
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| Total Reviews: |
183 |
This is a 5400rpm drive
- Pros: Completely SILENT. Runs COLD to the touch compared to my other drives. 320gb platters! No vibration at all!
- Cons: This is NOT a 7200rpm drive. It is fixed at 5400rpm. This has been proven via access times. No, the RPM does not vary either based on load. Western Digital CONFIRMS this drive as fixed 5400rpm. Newegg website is WRONG!
- Other Thoughts: Even at 5400rpm its still a fast drive due to dense 320gb platters! Perfect for secondary storage drive or in USB enclosures, or HTPC.
Nice & Quiet - So Far So Good
- Pros: I bought two of these drives for the Gentoo Linux Shuttle PC I built, which is on 24/7 and used primarily for hardware and software engineering. I use one as the main drive, and another in an external enclosure which backs up the main drive and can be swapped quickly if the main drive fails.
I always try to hit the sweet spot of quiet and performance, and this drive fills the bill nicely. The only time I can hear this drive is when it's seeking, which it does with a faint clicking sound, sorta like a cricket in a padded box. I get about 588G after formatting with EXT3. It runs cool in both my Shuttle and the external USB/SATA enclosure. It seems more than fast enough for me, but I'm not a gamer or server admin so that's not my main criteria anyway. Combine this drive with the fastest fanless PCIe video card you can find, and an ICE-cooled Shuttle (I'm running an overclocked 3GHz Q6600 with no problems) and you have a whisper-quiet workstation or HTPC solution.
- Cons: Western Digital. I've had problems with their drives in the past. I've been using mostly the quiet Seagate series, and the Samsung Spinpoints recently, but during this round of purchasing these Western Digitals seem to be the quietest and lowest power out there. With the drive density curve, about two years should be long enough, and then it's on to terrabyte territory. Until then, I've got the backup too...
- Other Thoughts: Neither the other reviewers, or Newegg, are completely correct. Western Digital rates the speed of this drive as 'IntelliPower', which means it varies between 5400 and 7200 RPM depending on loading. The Silent PC Review site has an informative post on this drive tabulating the differences between the AALS, AAKS and AACS versions of this WD 640G drive series. The other two drives are a constant 7200 RPM, so they naturally will run faster during access, at least initially. However, this drive runs 0.46W, 2.5w, and 5.4W standby, idle and R/W watts, versus 1W, 7.7W and 8.3W respectively for the other two. If you're looking for max performance, this isn't the right drive for you. However, if you're willing to trade some performance for a lot less power, heat and noise, this is a great choice.
| Model | WD6400AACS |
| Interface | SATA 3.0Gb/s |
| Capacity | 640GB |
| RPM | 7200 RPM |
| Cache | 16MB |
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- 5
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- 74%
- 4
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- 13%
- 3
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- 3%
- 2
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- 2%
- 1
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- 8%
| Product Rating: |
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| Total Reviews: |
183 |
When a product is good you notice the little things...
- Pros: Easy to set up through the Western Digital site. The Western Digital program for cloning my old hard drive to the new one worked well. Even going from EIDE to Sata wasn't a problem.
Everything seems to work fine, and performance has improved quite a bit. Shipping was quick as usual from Newegg.
- Cons: It's somewhat more loud than I expected. It's not that it's loud in it's own right, it might be whisper soft compared to the high pitched hum of my other components and fans, but when it's actively seeking it's sound is a low pitched rumble more like a kid blowing bubbles in his milk through a straw. It's just so noticable, while the hum is just background.
- Other Thoughts: Pentium 4 system from back when the Blue Man Group commercials were still going on.
My fault, but didn't know my old hard drive was EIDE (yes, did check that my Mobo had SATA hookups), so ended up shelling out a (relative) fortune for a new cable at Best Buy, when I expected to just plug it in with the old cable.
Nice drive but with limitations
- Pros: I have had this drive installed for nearly a year, had several OS installed, Linux, OSx86 and XP. The drive is very quiet, but you may hear the head park often though it's very subdued. Temperatures are low which in a small form factor PC with limited cooling, is an added bonus.
- Cons: Not the fastest but works for the average user, probably better as a storage disk then for OS if you want max. performance. Head park/load cycle count seems to be an issue with Linux based OS which may cause the drive to reach the 300K load/unload cycles in less then a year. I noticed using HDtune that this was evident when using Linux. WD released a patch to fix this but some have said it does little to help.
- Other Thoughts: WD makes good drives in my opinion, if your using Linux or have these in a NAS that runs Linux you may want to check the drive health more often then what's usual.
yep
- Pros: WD..always has been reliable for me. Would have preferred the 32 MB cache but this one was on uber sale for 10 bucks less than usual. Been happy ever since.
- Cons: Doesn't bring breakfast in bed.
- Other Thoughts: Tucans are cool birds.
| Model |
| Brand |
Western Digital |
| Series |
Caviar Green |
| Model |
WD6400AACS |
| Packaging |
Bare Drive |
| Performance |
| Interface |
SATA 3.0Gb/s |
| Capacity |
640GB |
| RPM |
7200 RPM |
| Cache |
16MB |
| Average Seek Time |
8.9ms |
| Physical Spec |
| Form Factor |
3.5" |
| Features |
| Features |
Reduced power consumption - WD has reduced power consumption by up to 40 percent compared to standard desktop drives with the combination of WD's IntelliSeek, NoTouch, and IntelliPower technologies
IntelliPower - A fine-tuned balance of spin speed, transfer rate and caching algorithms designed to deliver both significant power savings and solid performance.
IntelliSeek - Calculates optimum seek speeds to lower power consumption, noise, and vibration.
Perpendicular Magnetic Recording (PMR) - Employs PMR technology to achieve even greater areal density.
Low power spin-up - WD Caviar Green drives consume less current during startup allowing lower peak loads.
Advanced power technology - Electronic components deliver best-in-class low power consumption for reduced power requirements and increased reliability. |
| Manufacturer Warranty |
| Parts |
3 years limited |
| Labor |
3 years limited |
Introduction
The Western Digital Caviar Green 640GB Hard Drive uses less power and support quieter, cooler-running desktop PCs. Its breakthrough 16 MB cache makes this hard drive suitable for high-performance home and business computing, as it can handle high-end data-intensive and multimedia applications.
This hard drive incorporates WD’s GreenPower technology, which yields lower operating temperatures and low acoustics, best for ultra-quiet PCs and external drives use. The IntelliPower delivers a fine-tuned balance of spin speed, transfer rate and caching algorithms; IntelliSeek Calculates optimum seek speeds; and IntelliPark automatically unload the heads during idle. All the features help the drive to operation in lower power consumption and reduced noise environment.
Highlights
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GreenPower Technology
With GreenPower technology, the Western Digital Caviar Green WD6400AACS yields lower operating temperatures for increased reliability and low acoustics for ultra-quiet PCs and external drives.
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Reduced Power Consumption
Combined with WD's IntelliSeek, IntelliPark, and IntelliPower technologies, the Western Digital Caviar Green WD6400AACS has reduced power consumption by up to 40 percent compared to standard desktop drives
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SATA 3.0 Gb/s Interface
The Western Digital Caviar Green WD6400AACS features the SATA II interface supporting up to 3.0 Gb/s data transfer rates, Native Command Queuing (NCQ) and hot-pluggable point-to-point connections for optimum performance, efficiency, convenience and flexibility.
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Perpendicular Magnetic Recording
Perpendicular Magnetic recording technology enables industry-leading capacity in existing standard form factors and improves performance by increasing data density while reducing moving parts for enhanced reliability.
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Quick Specs
| Brand | Western Digital |
| Cache | 16MB |
| Capacity | 640GB |
| Average Seek Time | 8.9ms |
| Form Factor | 3.5" |
| Interface | SATA 3.0Gb/s |
| RPM | 7200 RPM |
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Reviewed By: Drive master on 10/6/2008
Tech Level: high - Ownership: 1 day to 1 week
