Your PC is strangely build:
It features a top notch i7, 16 gigs of RAM and what GPU? A entry level GT630. I can assume the guys who built your computer had no idea what they were doing, however let's not talk about that.
Could you try using 1xIR and EFB to Texture? If that speeds things up, you have a GPU bottleneck. While a i7 3770 at stock should be enough, I can't really check. I only have my Haswell to test, which is already way faster.
It features a top notch i7, 16 gigs of RAM and what GPU? A entry level GT630. I can assume the guys who built your computer had no idea what they were doing, however let's not talk about that.
Could you try using 1xIR and EFB to Texture? If that speeds things up, you have a GPU bottleneck. While a i7 3770 at stock should be enough, I can't really check. I only have my Haswell to test, which is already way faster.