Around 2. Feb I updated to 1.5t version, and from then 3 times I got one card "minining" with 0 Sol/s (or 0 point something).
First time I thought that it could be faulty pci-e riser, they are almost 2 years old, then I restated miner with same setting (also same OC) and then again after like 12-24 hours different card drop to 0 Sol/s.
Then I lower OC settings to confirm if it's something wrong with cards, and then after almost 2 days 3rd card drop to 0 Sol/s, in all cases power consumption also dropped to idle.
All 3 cars are GTX 1080, in a rig with 1x 1080ti + 5x 1080, with fee-time set to 40 sec and OC1 but later I saw that that is not supported on 1080.
So I reverted to 1.5s to confirm if it's hardware problem or problem with new miner version.
There wasn't any changes to driver or other software.
On 1.5s I was mining for more than 2 months without a problem.
Only minor defect on 1.5s is that miner was switching to dev fee but cards actually wasn't mining (gpu usage was 0, power consumption idle) but luckly they always returned to mining properly to pool.
Or regression? 