Hi ,
Which computer will handle the rendering more quickly?
Intel Core i7 4790, 16GB RAM, Nvidia GeForce GTX 745 will render faster because of higher RAM and better Processor.
What has a better impact? Better CPU or better GPU?
Both are important,better CPU +GPU can produce great rendering results.
Our recommendation is to get the best computer with higher configuration as per your Budget as you.
This article might help you
Build a powerful PC for Photoshop and other imaging applications
Regards
Akash