Asrock B250 Gaming K4

Pentium G4560

Corsair Vengeance LPX 8GB DDR4-2400

PSU Corsair 1000 platinum

SSD 120GB Kingston A400

ASUS ROG Strix GeForce GTX 1070 Ti x4 in each rig overclocked with afterburner mem=0 core=+100 power=80 38-43 degrees C
I can push the cards much higher on clock speeds (+150) but have stability issues every few days. No problems at all at +100 and will run for months on end.
Avg 8100 lyra2z (was 7650)
cpu Avg 390 yespower

I'm going to do a little more investigation.

My bios setup  https://blockoperations.com/gpu-miner-bios-settings-asrock-b250-gaming-k4-motherboard/