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USB3 + eSATA combo ExpressCards?

2015-08-09, 5:18 AM

Only a few months ago, I could find about 4 different ExpressCards offering both USB 3.0 and eSATA ports. I am under the impression that the ExpressCard port on the W500 is the way to go (though I don't know the max throughput for this port)


Of late, I can only find two brands of such a combo card. Almost all of them appear to look like these two, though the red, white and blue USB logo can sometimes be yellow or green as in the 2nd example:

Red White and Blue: http://www.ebay.com/itm/AKE-USB-3-0-eSATA-II-2-0-Combo-to-Express-Card-ExpressCard-54mm-Adapter-/331365989264?hash=item4d26f3bb90

Green: http://www.ebay.com/itm/Hidden-USB-3-0-eSATA-II-2-0-Combo-to-PCI-Express-Card-ExpressCard-54mm-Adapter-/271719111412?hash=item3f43b89af4

I did manage to find a second brand, used, as-is model of one of the combo cards I saw back in late winter:


Can anyone offer any experiences about either of these, or what chipset to avoid or look for?
Can the ExpressCard port handle SATA III rates, or just SATA 2?


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Re: USB3 + eSATA combo ExpressCards?

2015-08-10, 5:49 AM



As I understand it, the ThinkPad W500 is a 2008-era system with an Intel Core 2 Duo CPU and Intel PM45 chipset, which means it has an ExpressCard 1.2 interface.  The ExpressCard 1.2 interface has a maximum speed of 2.5 gigabits per second, which translates into 250 megabytes per second.


USB 3.0 operates at 5.0 gigabits per second (625 megabytes per second), whlie eSATA operates at either 3.0 gigabits per second (375MB/s) or 6.0 gigabits per second (750MB/s).


Any USB 3.0, eSATA or combo card should work just fine in a W500.  None of the interfaces will operate at their maximum speeds, but they will still be faster than using the W500's USB 2.0 ports.




Aryeh Goretsky


I am a volunteer and neither a Lenovo nor a Microsoft employee.

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