will this work?

Solution
Yes. The interface's physical size and shape are the same. They are also backwards compatible with each other, running at the fastest version of the PCI-E interface(3.0 card will run at 2.0 speed on 2.0 Motherboard).
Yes. The interface's physical size and shape are the same. They are also backwards compatible with each other, running at the fastest version of the PCI-E interface(3.0 card will run at 2.0 speed on 2.0 Motherboard).
 
Solution