That computer is a beast! It would be about as good as it could get on a PC... That 1080 would be phenomenal at mining zcash and the i9 7900 would get the same hashrate as some GPU's.
If someone had that lying about at home that would be such a good intro to mining!
Have you got that PC 
RE: [Tutorial] Setting up xmr-stak Monero Miner on Windows for Monero7 Protocol Update