Thanks for the replies! I have solved it by now, nothing wrong with your miner, maybe it was a little bit more sensitive. But it got worse and affected other algos like ETH, was a faulty PCIe power cable. When I replaced it, your miner worked fine!

I tried to only mine with the problematic GPUs. It got the same error, even without any core clock but PL. But if I excluded 1 & 2 it worked without errors.

No that didn't fix it. Same as before, forgot to mention that when the miner crashes, HiveOS reports GPU 1 & 2 need attention and the rig needs to be restarted.

Miner:   miniz
Version: 1.8z3


************ miniZ v1.8z3 ************
Number of miniZ CUDA>=[8.0] using driver CUDA[0.00] devices found: 4
Number of OpenCL[] devices found: 0
Driver:               510.73
Algo:              EQ[125,4] [smart-pers]
Telemetry:    [http://localhost:20000]
Logging::     file[/var/log/miner/miniz/miniz.log] period[10] delay[0]
Temp. limit:  [90°C]
[INFO   ] Mining fee set to 2.00%
miniZ<125,4>[01:0:00.0: 8005]: Selecting GPU#3[3] Nvidia GeForce GTX 1070 Ti
miniZ<125,4>[01:0:00.0: 8005]: Selecting GPU#2[2] Nvidia GeForce GTX 1070 Ti
miniZ<125,4>[02:0:00.0: 7999]: Selecting GPU#0[0] EVGA GeForce GTX 1080
miniZ<125,4>[02:0:00.0: 8001]: Selecting GPU#1[1] ASUS ROG Strix GTX1080 A8G Gaming
[ 0d 0h 0m03s] 79(79.0)Sol/s 171(170.8)W
 0>GTX 1080      ` 100% [52°C/ 0%] 20.08 I/s 40.05(40.05)Sol/s  43( 43.3)W clk=1885MHz mclk=5005MHz Sol/W=0.925
 1>GTX 1080      ` 100% [47°C/ 0%]  0.00 I/s  0.00( 0.00)Sol/s  46( 45.9)W clk=1898MHz mclk=5005MHz Sol/W=0.000
 2>GTX 1070 Ti   ` 100% [48°C/ 0%]  0.00 I/s  0.00( 0.00)Sol/s  41( 40.7)W clk=1885MHz mclk=4006MHz Sol/W=0.000
 3>GTX 1070 Ti   ` 100% [52°C/11%] 19.55 I/s 39.00(39.00)Sol/s  41( 41.0)W clk=1898MHz mclk=4006MHz Sol/W=0.952
[FATAL  ] GPU[1]: Driver error 999 'unknown error' in line 159

Why do I get this error with miniZ? I have tried different Nvidia drivers. Always GPU1. Have tried no OC at all. Other miners works.

Anyone have data how a GPU nowadays will perform on Scrypt algo? I saw a USB Scrypt miner like  Futurebit Moonlander USB Scrypt Miner. I think it's doing like 4 MH/s. How about a modern GPU?

I know it isn't profitable, but just want to know the difference between GPU and that small ASIC from like 2014?

Yes apperantly there is some scam coins, and others just fails. But Zclassic I was chocked about, it had a ATH value about $200 back in 2018, then it just dumped all the way to the bottom. I mined a lot of them with my ASIC Bitmain Z9 Mini, it was the most profitable to mine on it, never ROIed because of that

Also SnowGem, I really liked it, had a nice wallet and webpage. One day when I checked CoinMarketCap it was just gone

Either stocks or PoS coins are made of thin air. They also have a underlying value in a way or another. BUT the value can be highly overpriced, when for example a horde buys massively. But that's with everything, look at some Meme-coins

But, I agree, a PoW coin SHOULD have a more value because it's some work done that isn't for free. But that's no guarantee ofcourse, I have mined ZCL in 2018 and they are almost GONE. Some other coin like SnowGem also, GONE.

LolMiner works just fine with these cards, as well. I'm running two HD7950s with LolMiner doing 20-25 MH/s each @ ETC.

I'm a miner that stakes some coins like Cardano, Cosmos and Tezos. But the return of staking is VERY low, atleast for me. I calculated if I will invest $5000 into for example Cardano. I will get right now, 21834 ADA (price $2.24). I stake those at 4.91% in Exodus. I will get 1091 ADA ($2445) a year. It will take 20 YEARS to ROI

My mining rigs have ROIed like 5-7 times since 2017-2019. But that's mainly to the price increase, of course.

Don't buy the Bitmain Antminer E9! It's mining Ethereum, and we all know that it will go Proof of Stake in early 2022, then you not able to mine Ethereum. The ASIC can't switch to other coins that GPUs can. Well, you actually can mine other Ethash coins. But they are very low cap and has low net hashrate compaired to Ethereum, so your profits will plumber!

Yes they are still very good for many different algorithms as well. I have a bunch of them and they are very easy to use! Best GPUs I have in the long run, hassle free.

I have Nvidia 1000/2000/3000 series cards. AMD Vega 56, RX 5700 XT and 6600 XT cards. But Polaris is the most easy to use, that's my thought.

It depends. I have GPUs mining fine from 2017 when I bought them new (RX 570/580). I also have even older GPUs like R9 290 and HD7950 that I bought second hand and they mines well too.

The conclusion is that they can mine until they arn't profitable anymore. If your question is when they arn't profitable anymore, that's a harder question to answer. As I said above I still mine with HD7950s that are made in 2013, and they are still profitable, but it's crazy times right now. In 2019 GPUs bought in 2017 wasn't profitable

I have an couple of HD7950 and they can pull like 25 MH/s at Ethereum Classic. Revenue is like $1 a day. Power draws like 150 W if you modify the BIOS. Profit $0,63.

If you have them you can use them, but don't go buy some in this market. You'll probably overpay for them (like all GPUs), but they will be the first ones that gets unprofitable.

About GTX 970 I don't have an experience. But I think they arn't any good at mining. Gaming wise they are still.

I don't think it's weird, I have lowered the core clock to just 800 MHz and undervolted it some on the 290 to reduce the power, it's a blower style card and it overheats quite easy, and I don't want the fan to do more like 60% because of the noise.

Sure it CAN do maybe 28-30 MH/s, but I don't think that the most efficent thing to run at. Like you could do 31-32+ MH/s on Polaris cards, but that's either not efficent over all.

I have a rig with one RX 550 4 GB, one HD 7950 3 GB and one R9 290 4 GB. All mine ETC 59 MH/s @ 398 W at the wall (measured with power meter).

Also it's an 850 W PSU, only bronze rated.

RX 550: 11.35 MH/s
HD7950: 24.46 MH/s
R9 290: 23.13 MH/s

I'm trying to buy older AMD cards because they are really cheap and still profitable, if you known how to config them.

Good plan, ofcourse. Now the prices are extremely high on hardware, the difficulty on the blockchains are high. You are getting very low amount of coins now, the only thing it's very profitable is because the bull market.

When you have free electicity you can mine when there's a loss for others, buy GPUs when in next bear market I say. Buy cheap RTX or RX cards when everyone is quiting

Yes it's the same coin. But it has forked. It forks away from ASICs. Have been on LyraRev2 and LyraRev3 before. Don't know what algorighm back in 2014. Never the less, it's a great coin. I think you could optimize 79xx GPUs a lot like on Polaris etc. I had an 270x before and that was even profitable in the bear market mining Vertcoin on LyraRev2. I want a HD7950 or such to play with actually. I think it's still profitable on Verthash..

Like mentioned above, it's a bit of history in the crypto space!

I'm interesting how many Vertcoin do you mine per day per GPU? I'm mining Vertcoin with RX550/560 (they are mining like ~1 VTC/day) but I want to compare with older better GPUs

Just run 1100 MHz on core and 2000 Mhz on memory and you'll fine. Undervolt some like 850 mV maybe.

You answered your own question. Ethereum need more than 4 GB VRAM, not possible to mine with 4 GB cards nowadays. Well zombie mode exists but it's not worth the hassle. Better off if you can unlock all VRAM on the cards.