Black Magic Shuttle for recording from Xbox:Will PCIe USB 3.0 card work(x58 chipset)?

[Domin]

Hello i am new to this so dont scream at me yet.
I want to buy the Black Magic Shuttle pro to record xbox 360 with.
But:
I havent got usb 3.0's ;
will this still work if i get a PCIe usb 3.0's ??
i have a mini atx , dont know any other details ,
my pc is a Acer m7720
(EDIT)
Intel core i7 920
6 GB RAM
ATI HD 4850
1640 GB's
..................
Baisicly i want to have a splitter from the xbox , one to the TV and one to the Shuttle, so i can still play on my TV and record( i have 2 screens for PC)
Is that idea possible ???
THX
Dom