i use TDP 70% on all 5 GPU (1080-1080Ti) memory 0 and some core oc (around 1600-1800MHZ would be fine) i just using default settings (intensity 15, gridsize 7000+ GTX1080Ti, and 5000+ GTX1080), miner hashrate is around 14.3-14.4mh/sec, no slowdowns and stability problems or high % of stale shares, i installed new 425.11 hotfix driver as well using cuda 10.1 and windows 1709, in summer i probably try new 1903 windows 10 19h1 build, my rig needs around 32gb pagefile, so on 55gb ssd partition i have around 11gb free space left during mtp algo mining with tt-miner, i have only 4gb ram and celeron g1840 cpu on h81 motherboard, but overall 2650w power with 2X1000+1X650W gold certified PSU's