iMac late 2009 SSD upgrade, HD swap, link speed

Discussion in 'iMac' started by yoku, Dec 30, 2015.

  1. yoku macrumors newbie

    Joined:
    Dec 30, 2015
    #1
    Hello,

    recently i installed a SSD in my late 2009 21,5 iMac instead of the superdrive.
    Unfortunately the negotiated speed link of this SATA-port (NVidia MCP79 AHCI) remains at 1,5G.

    1. Now i am wondering if there is a chance, that if i replace the old HD with the SSD, the negotiated link speed will increase to 3G, although it is the same NVIDIA controller?

    2. Also i read about the problem with the thermal sensor: would it be possible to install the old HD instead of the superdrive and would the internal thermal sensor work?

    3. Would i need another bay adapter for the SSD or can i use the one i already used to install the SSD instead of the superdrive?

    Thanks for any hints!
     
  2. Dadioh macrumors 65816

    Dadioh

    Joined:
    Feb 3, 2010
    Location:
    Canada Eh?
    #2
    MCP79 has known issues with Sandforce controllers negotiating down to SATA1. I assume you bought a Sandforce based SSD? I would suggest you return it and get any non-Sandforce SSD to solve the issue. I personally recommend Samsung 850 EVO for good price/performance and 5 year warranty.

    I believe that you can solve the fan speed issue with a free program online called SSD Fan Control.
     
  3. yoku thread starter macrumors newbie

    Joined:
    Dec 30, 2015
    #3
    Thanks for your reply. I should have posted that information earlier: i bought exactly that SSD – a Samsung Evo 850 500GB. Nevertheless, the link speed is 1,5G.
     
  4. Dadioh macrumors 65816

    Dadioh

    Joined:
    Feb 3, 2010
    Location:
    Canada Eh?
    #4
    Hmmm. I was aware that chipset had issues with Sandforce but unaware of issues with 850 EVO. You could try the SSD in the other position to see if it negotiates up to SATA2 speed (3G).
     

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