My pleasure.
Sound like you were in a safe zone with those all stuff. As long as your rig running smoothly with that setup, keep going.

Oh yeah, that's good, let's waiting at least for next 24 hours. When you are using SATA connector for a riser power, make sure max one riser/rail, safer. Better using Molex (directly from PSU).

In the last few weeks, I have seen many threads discuss ASICs expansion that affecting miners (especially GPU miners). Many of them influence the other for boycott ASICs even boycotting coin itself. And the other reacting calmly. In every situation, there will be two different views. And that is normal.

Then, what would make you different? That's your act.  Each people has own decision and also individual action. Some people willing to lose their profit for paying their believe. The other one doesn't want to lose their profits, then trying to survive in the current situation, some other even didn't care about all of this, there is also a surrender. And many other things.

Personally, I believe in this:


Keep learning and keep running.
How about you buddy?

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# I am GPUs miner, and I'm not scared 

Damn, I can't stop laughing. So we can call Bitmain as Batman today? Or may forever. "BATMAN FOREVER." Big thank buddy, you shine my day. 

Seems like this issue isn't related to the brand.
So you have three rigs, may you can tell us how much Sapphire on those three rigs that were troubled? All of Sapphire?

The best way to check it may as OgNasty said, switch it. Fine cards to the troubled rig and Troubled card to the fine rig.

Sometimes AMD's cards need to read output, may you can plug dummy output to the troubled cards.

With those 2 x Rosewill Hive 1000W, you have 2x 8 pins and 12 x 8 (6+2) pins, right? Then how your GPU power scheme? Also, we need risers power scheme if possible.

Like the other said above, sound like most possible causing your problem is you haven't finished updates. You can check update history to make it sure. If it's isn't cause it. You can start to do troubleshooting.

Oh..c'mon guys.
Whatever happened and whoever cause, we need to face the fact. Keep running, cause we are human, we grow and expand. If we are skilled enough and hopper, we can survive.

Like I said before:

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# I am GPUs miner, and I'm not scared. 

The one only reason that Ethereum diff was massive grow, it caused by enormous increasing on Network Hashrate (Global Hashrate) (whoever causing this).

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Altcoin (Alternative Coins) mean coins beside Bitcoin., whatever it is. CPUs, GPUs or may ASICs only devices that you can use for mining, even you can mine Bitcoin by CPU or GPU (if you didn't care about profitability issue). So whats the problems? 

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Remember, CPUs, GPUs or may ASICs is only devices. This is Altcoin (mining) board. Whatever device you are using, of course.

Yeah, that is the prob.
Your pool didn't solve any block cause you didn't have enough hashrate to solving a block. With your current hashrate, you have a bit chance of solving blocks.

Oh man...
One thing that I know, we can't deny changes and innovation, we can stick or follow. Decisions are yours. 

I also GPU miner, for honest, am doing this for profit. As we know, Crypto was full of innovation. And I didn't stick to one coin only. So, I don't really care about ASIC expanding.

Yeah, maybe. 
It will depend on people's If most people think same as you, may that 10x decrease to zero (0) soon. That is profitability rules.

1500 Watt ideally for that setup, Safer.
Then you need more concern to PSUs with more enough PCIe socket, cause Vega 64 need 2 x 8pins, and RX 570 need at least required 1 x 6pins.

It because Nicehash is hashing market. So, Nicehash parameter is their rent price itself. Then who create its price? Of course their renter. This is explaining that the one who knows which coin that most profitable is Miners itself.

Like leonix said and also based on my experience, jump-start technique better than add2psu (at least for me). Sometimes, your 2nd PSU will run into power-up delaying when using this tool.

You need to pay more attention to powering scheme on your rig. Cause this is one of most GPUs rig problems.

Ah..we got an example for altcoin solo mining pool. 

Yes, global hashrate must be more concern when we were going to solo mining, even when we do in a solo mining pool.

Block reward is fixed. But depends on its coins itself for every specific block this "block reward" will decrease (or we called it as Halving). Again, Bitcoin as the example. Bitcoin will halve its block reward every 210,000 blocks.

Every coin has technical info, In announcement thread (at this forum), Whattomine, Coinwarz (or wherever / something similar) you could find this "block reward" info.

Using a private pool, you can directly rent hashes somewhere out there (Let's says, Nicehash, MRR,...) in case you need more hashes for solo mining. But you need more cost to pay VPS or Dedicated server. (I assume your private pool built on the server). But you can also create your pool locally.

Using QT Wallet, you can only be using your local machine, except you skilled on port forwarding nor stratum proxy. You can Google it.

So,I felt more suitable using the private pool on the server than QT Wallet. But don't forget to save PrivKey, in case something bad happens.

I was suspecting this is power scheme issue. How you connect those two PSU, how you split cable from both PSU for powering your cards and risers. Etc.