Re: How Do I Add USB 3.0 and Thunderbolt to my PC?
You said the card is way to small to fit into the green slot, so its safe to say that picture you posted isnt the card you have?
The green slots are PCI-E 16x slots (slot wise), but a USB3 card would be PCI-E x4. So yeah, it would only take up 1/4 of the slot. Its meant that way