Thunderbolt Card?

I don't know. Tell us Your specs naow!

Spent around $700 including shipping and taxes.
i3
2GB Radeon, R9 270x
8GB Ram

It was 10 times harder to put it all together than I imagined.

But it sucks, I am limited so much more by the bandwidth than my computer. How am I supped to play Shadows of Mordor when the base game is three times my monthly cap.

Thunderbolt is kinda like Firewire or USB. It's for attaching external devices like hard disks or graphics cards over a fast connection.

Apple are really the only ones to use it and Thunderbolt devices are pretty expensive so unless you're into some high-level stuff it's probably not worth considering.