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    SATA 150 limit on ACER5810TZ ?

    Discussion in 'Acer' started by efive, Dec 28, 2010.

  1. efive

    efive Newbie

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    I am using an Intel SSD in an Acer5810TZ.
    Reads appear to be limited to 134MB/s, which appears to be due to the port being in SATA1 mode.

    The GS45 chipset should support SATA2 speeds - both from Intel's site, and anecdotal posts.
    I've seen one blog decrying the 4810T's lack of SATA2, but on a thread here a lucky soul was getting SATA2 speeds on their 4810T.

    Does anyone know what the story is?
    Is this a hardware thing by SKU where something needs to be populated?
    Is it a BIOS limitation?
    Possible driver issues?

    I'm using the latest BIOS, and experiments are done without the DVD drive installed.
    As far as BIOS is concerned, things appeared right - based on the thread here, http://forum.notebookreview.com/lenovo-ibm/312522-thinkpad-sata-1-5gb-s-limitation-ssd-5.html
    AHCI CAP register is: FF22FFC3 (SATA2)
    Boot to DOS:
    Port1 status register is: 123 (Active, Gen2 communications negotiated, device present)
    Boot to MiniXP!!
    Port1 status register is: 113 (Active, Gen1, device present)

    Driverwise: Win7 native AHCI driver and Intel IASTOR drivers (showing "ICH9M-E/M SATA ACHI Controller")
     
    efive, Dec 28, 2010
    #1