I have a 6 GTX 1070 mining rig I just built a few days ago, and it works well except I noticed it has quite poor Equihash Excavator hashrate with NiceHash software. I am getting ~320 sol/s at stock settings and ~315 sol/s at 66% TDP +180 core -480 memory. I think other people are getting around ~400 sol/s at stock settings.
Any tips on how to fix or how I should troubleshoot it? Have tried: older version of NiceHash, Ethernet cable instead of WiFi Adapter, uninstalling and reinstalling GPU drivers (I will try DDU next), and using only one GPU at a time.
My rig:
5x Zotac 1070
http://www.ebay.com/itm/2920411668871x Old Asus Strix 970
MSI Z170A Gaming Pro Carbon
Sandisk Plus 120GB SSD
Seasonic Prime Platinum 1200W PSU
Intel Celeron G3920
6-Pack V006C PCI-E 16x to 1x Powered Riser GPU Adapter
http://www.ebay.com/itm/6-Pack-V006C-PCI-E-16x-to-1x-Powered-Riser-GPU-Adapter-6-pin-ETH-Zcash-mining-/112300842118Ballistix Sport LT 4GB Single DDR4 2400 MT/s (PC419200) DIMM 288Pin BLS4G4D240FSE
Image of 66% TDP overclocked and 100% TDP overclocked:
http://imgur.com/a/9DXfd