Connect Samsung 840 pro 256gb to a Asus ph755-m/usb3 sata 3

Hi there,

I just purchased a samsung 840 pro ssd, and I am trying to connect it to my sata 3 port on my Asus ph755-m/usb3 motherboard.

I set the Marvell & intel controller in the bios setting to AHCI.

I performed a migration from my HDD to SDD.

I did change the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\msahci to 0.

When my SSD is connected to the sata 3 port. The boot setup in the Bios says that my SSD is using IDE.

The Samsung Magician Software says that AHCI is deactivated, however as mentioned above it I activated both the controllers.

When I connected the SSD to my SATA 2 port the magician software showed that my AHCI is activated but obviously the SSD wasnt using the sata 3 port.

My motherboard has been updated to the latest firmware, version 1105.

I also updated the Marvell 91XX driver V1.0.0.1045 & Marvell Controller Driver V1.0.0.1036.

Please can someone help me connect the SSD to sata 3.

3 answers Last reply
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  1. I solved the problem after few hours searching the internet.

    Apparently if you have your DVD ROM drive connected to the Marvell Sata 3 ports it effects the SSD connection.

    However after I rebooted the computer and the Samsung magician software showed that the AHCI was activated and the SATA 3 is connected I got much lower benchmarking results compared to the Intel SATA 2 ports.

    On the Intel SATA 2 ports using the Samsung magician software my results were:

    On the Marvell Sata 3 port my results were:

    It is a huge drop in performance when it is supposed to increase my performance between SATA 2 & 3

    Can anyone instruct me on how I can improve my performance please.
  2. Just use Intel SATA2 connector, it is usually faster then older Marvel SATA 3 controller.
  3. mad-max79 said:
    Just use Intel SATA2 connector, it is usually faster then older Marvel SATA 3 controller.

    Yeah that's what Ill do. Thanks for your reply. Cheers.

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