This was more my gaming PC that i am just running mining software on when I'm not gaming on it. the 980ti it a beast of a card still and is still better than a 1070 for gaming. however for mining you don't really want to go these specs. The motherboard is a horrible motherboard as the VRM overheats and is a common problem which as you probably know and overheating is not good for a mining rig.
If you are going for minimum go for a GTX 1060 card (If you can find one) and the processor can be cheap but its all about the motherboard.