7x 1070 what psu you using could be anything dogey riser insufficient psu.... if your other rigs are running fine an it is just this one i would pull it apart start with one card and one riser install test then add another card keep doing that... that why you can test each riser / gpu and find the problem...
Hope that helped...
Regards
Nemo
P.S looking at the data you provided above:
GPU0 59C Sol/s: 331.3 Sol/W: 3.11 Avg: 331.1 I/s: 176.1 Sh: 0.00 . .
GPU1 61C Sol/s: 440.5 Sol/W: 3.95 Avg: 445.1 I/s: 238.0 Sh: 0.19 1.00 76
GPU2 55C Sol/s: 467.7 Sol/W: 4.14 Avg: 465.4 I/s: 248.7 Sh: 0.56 1.00 80
GPU3 58C Sol/s: 446.8 Sol/W: 3.99 Avg: 445.6 I/s: 238.1 Sh: 0.00 . .
GPU4 59C Sol/s: 455.9 Sol/W: 4.03 Avg: 454.3 I/s: 241.9 Sh: 0.00 . .
GPU5 57C Sol/s: 440.0 Sol/W: 3.96 Avg: 446.3 I/s: 238.5 Sh: 0.00 . .
> GPU6 63C Sol/s: 482.2 Sol/W: 3.58 Avg: 481.1 I/s: 256.2 Sh: 0.19 1.00 74
========== Sol/s: 3064.5 Sol/W: 3.82 Avg: 3068.9 I/s: 1637.7 Sh: 0.94 1.00 76
> GPU0 60C Sol/s: 335.7 Sol/W: 3.11 Avg: 331.4 I/s: 179.0 Sh: 0.00 . .
> GPU1 61C Sol/s: 438.4 Sol/W: 3.94 Avg: 444.7 I/s: 237.9 Sh: 0.35 1.00 79 +
> GPU2 55C Sol/s: 465.6 Sol/W: 4.14 Avg: 465.4 I/s: 248.7 Sh: 0.53 1.00 80
gpu_id 1 71 2 unspecified launch failure
gpu 1 unresponsive - check overclocking
gpu_id 5 66 3 unspecified launch failure
cudaMemcpy 1 failed
gpu 5 unresponsive - check overclocking
cudaMemcpy 1 failed
something seems to be wrong with GPU 0... Sol/s: 331.3 335.7 is over 100 sols short of what the other 6 1070's are doing may won't to start there...
you may won't to check your OC setting also...
i run my g1 Gaming 1070's at 70%tdp (120-125)watt +75 core +505mem
Nemo the gpu0 goes down 100 sols/s after I log into the rig. It gives that power to the display when I log into it:
========== Sol/s: 3163.5 Sol/W: 3.89 Avg: 3133.2 I/s: 1688.1 Sh: 3.30 1.00 78
> GPU4 60C Sol/s: 449.4 Sol/W: 4.00 Avg: 451.1 I/s: 241.9 Sh: 0.50 1.00 78
GPU1 61C Sol/s: 441.7 Sol/W: 3.93 Avg: 442.7 I/s: 237.6 Sh: 0.56 1.00 78
GPU2 56C Sol/s: 464.5 Sol/W: 4.09 Avg: 457.7 I/s: 246.6 Sh: 0.49 1.00 78
GPU5 58C Sol/s: 447.8 Sol/W: 3.95 Avg: 445.2 I/s: 238.2 Sh: 0.40 1.00 78
GPU3 59C Sol/s: 442.9 Sol/W: 3.93 Avg: 438.4 I/s: 236.0 Sh: 0.47 1.00 78
GPU0 63C Sol/s: 441.1 Sol/W: 3.77 Avg: 421.1 I/s: 233.9 Sh: 0.42 1.00 78
GPU6 64C Sol/s: 486.9 Sol/W: 3.55 Avg: 477.3 I/s: 255.8 Sh: 0.42 1.00 78
========== Sol/s: 3174.1 Sol/W: 3.89 Avg: 3133.5 I/s: 1690.0 Sh: 3.28 1.00 78
GPU4 60C Sol/s: 447.6 Sol/W: 4.00 Avg: 451.0 I/s: 241.8 Sh: 0.49 1.00 78
GPU1 61C Sol/s: 440.8 Sol/W: 3.93 Avg: 442.7 I/s: 237.5 Sh: 0.58 1.00 78 +
GPU2 56C Sol/s: 454.9 Sol/W: 4.09 Avg: 457.7 I/s: 245.6 Sh: 0.51 1.00 79 +
GPU5 58C Sol/s: 440.6 Sol/W: 3.95 Avg: 445.2 I/s: 238.4 Sh: 0.42 1.00 78 +
GPU3 59C Sol/s: 445.1 Sol/W: 3.93 Avg: 438.4 I/s: 235.0 Sh: 0.47 1.00 78
GPU6 64C Sol/s: 473.3 Sol/W: 3.55 Avg: 477.2 I/s: 256.0 Sh: 0.42 1.00 78
========== Sol/s: 3143.3 Sol/W: 3.89 Avg: 3133.4 I/s: 1688.2 Sh: 3.32 1.00 78
GPU0 63C Sol/s: 438.5 Sol/W: 3.77 Avg: 421.2 I/s: 234.1 Sh: 0.42 1.00 78
# server set difficulty to: 00009e842444b57508000000...
> GPU4 60C Sol/s: 456.1 Sol/W: 4.00 Avg: 451.1 I/s: 242.0 Sh: 0.49 1.00 78
> GPU1 61C Sol/s: 444.9 Sol/W: 3.93 Avg: 442.7 I/s: 237.0 Sh: 0.58 1.00 78
> GPU2 56C Sol/s: 454.4 Sol/W: 4.08 Avg: 457.7 I/s: 244.3 Sh: 0.51 1.00 79
> GPU5 58C Sol/s: 447.1 Sol/W: 3.95 Avg: 445.2 I/s: 237.3 Sh: 0.42 1.00 78
> GPU3 59C Sol/s: 446.8 Sol/W: 3.93 Avg: 438.5 I/s: 234.5 Sh: 0.46 1.00 78
> GPU0 62C Sol/s: 382.5 Sol/W: 3.77 Avg: 420.9 I/s: 207.6 Sh: 0.42 1.00 78
> GPU6 64C Sol/s: 481.5 Sol/W: 3.55 Avg: 477.3 I/s: 255.3 Sh: 0.42 1.00 78
========== Sol/s: 3169.3 Sol/W: 3.89 Avg: 3133.7 I/s: 1684.5 Sh: 3.30 1.00 78
I dont think there is a hardware issue as there have been times it ran for over 24 hours without any issues. Its going on almost 5 hours now and no errors dished out. Fingers crossed.
Update: Miner crashed again2 hours ago. I checked the event viewer and its logged that the nvidia driver is crashing and one second later carrying zm.exe with it. I'm going to uninstall the drivers and completely reinstate with a fresh driver copy and see how it goes. Thanks for listening to my rants but its good to keep a log of all these things here for future reference.