Troubleshooting SD-PEX50055

Do not change any Motherboard BIOS SATA Configuration settings.

Check if there is a BIOS update available for the motherboard.

Remove and seat the card into a PCIe v2.0 x4/x8/or x16 slot. 

Confirm that the card is seated into a PCI v2.0 slot to function as advertised USB 3.0 5Gb/s and SATA III 6 Gb/s speeds.

If seated into a PCIe v1.0/1.1 slot, it will only be able to run with 1 channel which is 1.5-3Gb/s transfer speeds.

Assistance of 4pin floppy power feed is only necessary for USB 3.0 devices that require Power over USB 3.0 with no assistance of an AC power adapter.



Windows:
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This card should be recognized by the OS, but uses generic Windows AHCI driver when installed automatically.


This card should be recognized in Device Manager.

You will need to install 2 drivers total. 1 for the USB 3.0 Ports (Etron Folder) and 1 for the SATA ports (ASMedia)

Download driver package here:
http://sybausa.com/resource/SD-PEX50055/SD-PEX50055.zip
Unzip/Extract all files.

Run the Setup.exe file in ASM106x > Windows.

It should be recognized in Device Manager as a "ASMedia 106x 6G Controller" in the IDE ATA/ATAPI controller section

You can also install the ASM106x driver manually:

Navigate to Device Manager.

In the IDE ATA/ATAPI controllers sections, find "Standard SATA AHCI Controller"

Right-click and Update Driver Software.

Select: Browse my computer for driver software.
Select: Let me pick from list of device drivers on my computer.
Check in: Show compatible hardware.

Click Standard SATA AHCI Controller/ or all devices
Click Have Disk button
Click Browse, navigate to Driver Windows files:
ASM106x > Windows > Driver > VistaLater >  (OS bit version) > asahci64.inf; click next.

Window will prompt that the driver has no digital signature, Select: 'Install these drivers anyway'

Drivers should be installed.

Mac OS X:
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Supports 

0.89 and 0.88 supports Mac OS 10.7.2 only

External HDD via USB 3.0 may need to be initialized/partitioned.

Navigate to Disk Utility.

Applications > Utilities > Disk Utility

You will see a Partition tab. Then on that tab, select the partition layout you want, and at the bottom click 'Options...' — you'll be able to select GUID Partition Table from there.

If there is already a partition, the HDD needs to be initialized, if there is no partition, you must create one.

Also check for a software update.


Linux:
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As for Linux OS, you should install the xHCI and AHCI drivers from an update.