no fifth 1080 card is just different model and it's working with lower core speeds, difference is around 150MHZ between MSI gamer x 1080 and EVGA 1080 FTW using second bios with -50 core oc + teamviewer by the way in f2pool statistics average 24 hour hashrate is 30g.sec, while miner shows only 27.20g without using teamviewer, so there's no performance decrease on my rig, by the way first GPU is 1080Ti zotac amp on my rig with core oc 120+ all five gpu work at TDP 70% and 53-55% fan, temps are around 2-3 °C less than on skunkhash,X16R and other X algos
https://i.imgur.com/ndmFSVk.pnghttps://i.imgur.com/jiWii7d.pnghttps://i.imgur.com/hh3RpLD.pngmaybe it's because increased fidelity in latest build:
Improved the miner fidelity by 8%-10%. You will not see big local difference but you will see roughly 10% higher speed on the pool side.
so there's definitely some problem with 6+ GPU rigs at the moment even with latest intel i7, also 1080Ti will need higher pagefile than 1070-1080 with just 8GB VRAM, well 7-8 GPU rig need at least 120gb ssd with just only 4gb ram but at the moment performance drop would be quite big on such systems even with i7, i have only 60gb and there's only 10gb free space left with 32gb pagefile, but system stability is quite good in 24 hour mining period, even with 5X1080Ti maybe there's some performance drop using higher pagefile and 120gb ssd, since 60gb partition won't be enough with 5X11GB VRAM GPU + 1080Ti need higher cpu usage than 1080
i haven't tested beam hashrates and profits yet on nicehash with equahash 150.5 algo, i think it doesn't need so large pagefile and should do around 0.0016-0.0018 bitcoins per day with 120-130 Sol/s hashrate, later they should add grincoin as well, grin-beam-Zcoin are most profitable coins to mine at the moment, but grin at the moment has highest income on my rig