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9.5 mm: MK6465GSX, 640GB

9.5 Versus 12.5 mm: Which Notebook HDD Is Right For You?
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We picked two Toshiba hard drives for an apples-to-apples comparison. The first product is the MK6465GSX, today's 640GB drive. There is also a 750GB model. We haven't received this drive yet, but differences compared with the 640GB should be minor.

The 640GB model uses two platters and stands just under a 9.5 mm height. The spindle speed is 5,400 RPM, the standard rotation rate for mainstream and high-capacity laptop drives. Toshiba specifies a MTBF rating of 600,000 hours, but it's hard to compare this because Seagate and WD do not publish any reliability specifications. Toshiba's 3 Gb/s SATA interface and 8MB cache are check box items, as is the operating temperature of 5°C to 55°C. A few drives can run at up to 60°C, but this shouldn't be relevant in most environments. Toshiba also offers models at 160, 250, 320, and 500GB capacities.

We measured a maximum read transfer rate of 91 MB/s. That’s excellent for a conventional hard drive, and although the three-platter unit delivers a bit more throughput, this two-platter model wins on access time and application performance. Amazingly, both drives show almost identical idle power consumption and maximum read speeds.

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  • 0 Hide
    Ubrales , May 22, 2010 10:14 PM
    Good informative article, with a clear concise conclusion!
  • 1 Hide
    mikie tim t , May 24, 2010 8:57 PM
    I could see these being beneficial in SSD/App, HD/Data type setups where the SSD is the boot/app drive with the HD as the data drive.
  • 0 Hide
    danwat1234 , July 24, 2010 11:50 PM
    mikie tim tI could see these being beneficial in SSD/App, HD/Data type setups where the SSD is the boot/app drive with the HD as the data drive.


    Exactly. SSD for OS and apps, this drive (or a 1.5TB 12.5mm drive when it comes out) for storage of large, defragmented files.

    Meh ... but by the time a 1.5TB 12.5mm drive comes out, a 1000GB 7200RPM 9.5mm drive will be around ... decisions decisions.