Cystash :
I would say he could until i saw he is running an R7. I had an Amd card a while back and i tried running UE4 and it kept crashing and giving errors. I dont think UE4 likes amd cards to much. Thats just my opinion. The processor should be fine though you guys might just go ahead and try it out and see what happens maybe you will have better luck being that the card he has is newer than the amd card i had at the time.
Works fine on my i5 2500k and i7 2600k (But both clocked to 4500ghz) with a 390x, and before that my 6950 (Though admittedly it wasn't UR4 on the 6950). Actually the recommended hardware is
Here's what we recommend on the FAQ:
Desktop PC or Mac.
Windows 7 64-bit or Mac OS X 10.9.2 or later.
Quad-core Intel or AMD processor, 2.5 GHz or faster.
NVIDIA GeForce 470 GTX or AMD Radeon 6870 HD series card or higher.
8 GB RAM.
so you should be fine.