Quote from: .F. on March 14, 2018, 12:33:17 PM

Quote from: philipma1957 on March 14, 2018, 12:30:19 PM

Quote from: .F. on March 14, 2018, 12:07:51 PM

Hi All,

Really need some help. I bought a antminer A3 off e-bay and the previous owner overclocked it. I've been running it off 110v for the past few days until I had 220v installed in my house yesterday. A couple of times since I've been running it, I noticed that the hashing would go down on certain boards and then go back up...and it cycled through the boards like this (going up and going down). Once I got xxx's across board 2 but, when I restarted the A3, they went away and things were working again like normal. Until this morning...

The A3 kept cycling through again (board 1 would go down to like 5/gh/s and then go back up, and then board 2 would go down while board one went up, then board 3...and so on). One board started showing 1-2 x's and then they all went to x's. But then within 2-3 minutes the x's went away. But it was still cycling through going up and down on hash rate. Since I have Awesome Miner I tried to reset it a couple of times remotely and I even restored it to factory settings. At first, it kept cycling through like I mentioned above but then, all of the sudden it started working again (up to 825 gh/s). And it's held speed that for a while.

All temps are OK - it's all very cool right now.

Any idea what would cause this? Is it a PSU issue or board issue?

first off this is an alt coin question.

may be connection to the pool issue hard to tell.

what did you pay for it?

$2,000

It's working now...I think it was on SiaCoin side.

Also, restoring to factory settings unclocks it, right? I was enjoying the extra gains but it makes me nervous running it at such high speeds (it was getting 900+GH/S).

I think this issue with the boards and the x's likely has to do with running it on 110 but I'll share my experience ...

Even once I got my A3 up and running on 220 I was having issues like this, and I wasn't even overclocking ... I actually was seeing really high temps and x's show up on boards so I set mine up to underclock to about 575M (in Miner Config, Advanced Settings) and those issues have seemed to stopped for the last month or so ... If you run it at default (which I believe is 600M) and have issues continue due to the high temps you might consider lowering it for improved stability.

As for hash rate, mine day to day is all over the place, and to your point it might be the pool because I've tried Sia and F2pool and seen the same thing.