Just curious if anyone has ever experienced this or has known of it happening. Last night, both of my miners were working along at their stable (expected) hash rates, and then we had a momentary black-out that caused them both to shutdown. I had them both rebooted in a matter of minutes, and didn't pay much attention to the hash rate of each card, just that they were restarting, and working. Several hours passed, and when I checked back, all 7 of my cards are now operating at about 4 - 5 MH/s slower than they were before the power outage. This is spread across 7 different cards, 2 different motherboards, and 2 different PSU's. The only two common points that I can some up with are the pool that they connect to and the plug in the wall that supply's power. I would have thought that regulated PSU's would deliver the same DC voltage, regardless of input (within tolerance). Looking at my Kill-a-watt, it shows a max Vac of 124.5 and a current Vac of 113.8, so I know that there has been some fluctuation on the line at some point.
I don't think so.
I would not trust kill-a-watt, it has 10% tolerance.
PSU better deliver 5V and 12V no matter what the swing on the line is (to a degree).
Is your network connection ok? Same or slower. Run speedtest.net
Temperature outside, inside (the cases)?
BTW, 4-5 MH/s is not much, it could be just a variance.
