What is host bus interface for pavilion dv7 1448dx

I'm thinking of Installing a usb 3 ExpressCard/54 in a Pavllion dv7 1448dx. Does anyone know where I can find out if the host bus interface of the 1448dx ExpressCard slot is Gen 1.0 enabled or Gen 2.0 enabled.
That will tell me if it's worth the efffort to add a USB 3 express card. According to the manufacturer of the card if the interface is Gen 1 the throughput is 2.5 Gbps and if the interface is  Gen 2 then the throughput is 5Gbps.

Hi,
You are having a fast car, you need a good road to run it fast, and if the laws allow you to run it fast. Anyway, you can buy RAM from Crucial or use the information (including price) to by elsewhere:
  http://www.crucial.com/upgrade/HP-memory/Pavilion+DV7+Series/Pavilion+dv7-4269wm-upgrades.html
Regards.
BH
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