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Ethereum GPU mining?

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bsp2020 said:
Not sure if you can mine with both graphics cards at the same time, since you have two different card from two different manufacturer.
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Pretty sure Claymore's ETH miner supports simultaneous mining with cards of different architecture (mixed mining). Or you can just launch two instances of the miner with different config files.
 
Crono said:
1000W+ power supplies are probably the biggest hit after GPUs. You can find some under $200, but all the quality units from brands like Seasonic are overpriced or out of stock.
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I found that too, once you get into the 1000w range the prices go up fast. I ended up going with 2x 850w psus as it's actually cheaper than a single 1200w psu and gives more overall power.

I'll probably rig the secondary PSU so a relay turns it on and the relay will just be powered by the 12v output of the first one. The relay will just control the power on wire so just any old relay will work.
 
Red Squirrel said:
I found that too, once you get into the 1000w range the prices go up fast. I ended up going with 2x 850w psus as it's actually cheaper than a single 1200w psu and gives more overall power.

I'll probably rig the secondary PSU so a relay turns it on and the relay will just be powered by the 12v output of the first one. The relay will just control the power on wire so just any old relay will work.
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So, I've got a pair of 850's myself, and can confirm if you've got multiple cards stacked off risers, none will actually power on until the riser powers on.

My primary rig has 5x 1080ti's, PSU1 gets mobo, and card 1/2's 8/6-pins, card3's 6-pin. PSU2 gets card3's 8-pin, and card 4/5's 6/8-pins. PSU2 can be on and the cards get LEDs (hilariously, even card1/2... I assume it's trickling through the PCIe infrastructure), but nothing comes on until PSU1 turns on, at which point everything's happy.

If you want to relay/combo switch them, it works too, I've got a little plastic $5 jobber that I was going to use until it apparently became unnecessary.
 
[DHT]Osiris said:
So, I've got a pair of 850's myself, and can confirm if you've got multiple cards stacked off risers, none will actually power on until the riser powers on.

My primary rig has 5x 1080ti's, PSU1 gets mobo,
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Actually, that happens because PSU1 is the one that powers the motherboard. The secondary PSU can sometimes be on, but the system itself isn't on until the main PSU is. I had a setup of CX430 main + Quark 650W secondary powering 3 cards, so speaking from experience. Perhaps that's what you meant by "riser" though. Riser in my case means PCIe risers.

If you want to relay/combo switch them, it works too, I've got a little plastic $5 jobber that I was going to use until it apparently became unnecessary.
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I used something like this: https://www.ebay.ca/itm/24-Pin-Trip...224876?hash=item3d556d32ec:g:BGIAAOSwndZaU6Ov

I try to be safe by not going over 70% load on the PSU. My power supplies are at ~60% load. I make sure to choose power supplies that have enough PCIe cables(not connections) as the number of cards I'm trying to connect, and same for the PERI connectors for the risers. EVGA is best at it, Seasonic and Corsair is not too bad, although I prefer Seasonic for quality. Some brands like Rosewill give you two cables, even though the power supply has connections for three.
 
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One thing I do wonder though, is there any danger of voltage differentials, ex: one psu's 12v rail might be 12.1 while the other might be 12.3, will that actually cause some weird 0.2 voltage difference/loop that could blow components? Inputs are more than likely just going straight to a buck converter anyway right? Can't really tell for sure by looking at a GPU as most of the components are hidden but I do see some components that point towards the possibility of a buck converter. To be safe I guess it's probably good to power the riser and the card itself from the same PSU, as the risers take their own power anyway, which is good, so no power is traveling over the USB as far as I can tell.

Kind of getting excited to build my real rig. Having the card jerry rigged in my gaming machine with the case cover off is kinda annoying. 😛 I will build my rig's case as 5U so the card will fit. 4U does not quite cut it.

Also managed to score another 1070 off ebay at a half decent price. $800ish. Not too bad considering I paid over $700 for the first one, at retail price.

At this point ROI is kind of far, so I really need to stop spending money on this. But I see it as a fun project too, also not really considering the cost of the rig components, as I can easily repurpose that. I'm hoping I get a nice tax return this year as it will help pay off this stuff. 😛
 
Red Squirrel,

I'm seeing a 1070 Ti for $729.99 on Newegg.ca right now. $800 is a lot for non-Ti. It was $550 average just a month ago. If you aren't looking to get many cards at once, but just one at a time, you can check Newegg once in a while and see if they are selling cards. Nvidia card pricing isn't inflated as AMD card pricing.

I made a mistake, I linked the connector for 3 power supplies. I use something like this: https://www.ebay.ca/itm/24-pin-To-Dual-24-pin-ATX-Power-Supply-Cable-Connector-Splitter-Dual-PSU-Adapter/202181663627?_trkparms=aid=555018&algo=PL.SIM&ao=2&asc=20161027085944&meid=03a872bbfb2148a28e2d48fdf7743b6e&pid=100623&rk=1&rkt=6&sd=263426224876&_trksid=p2047675.c100623.m-1

ex: one psu's 12v rail might be 12.1 while the other might be 12.3, will that actually cause some weird 0.2 voltage difference/loop that could blow components?
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I took at the PSU splitter myself, and the secondary 24 pin has only two wires connected; one is the Power ON pin 16, and Ground pin 18. So there's no risk of 12V overlapping. It might be the cards are at a different voltage, so yea, try to plug PCIe 6/8 pin and riser with one power supply, rather than splitting them up into two.
 
Yeah they don't last very long.

I think Newegg is listing a few at a time to give everyone a chance instead of listing them all. So kind of have to be lucky and look at the exact right moment. At least there is still a chance at getting them though.
 
IntelUser2000 said:
Actually, that happens because PSU1 is the one that powers the motherboard. The secondary PSU can sometimes be on, but the system itself isn't on until the main PSU is. I had a setup of CX430 main + Quark 650W secondary powering 3 cards, so speaking from experience. Perhaps that's what you meant by "riser" though. Riser in my case means PCIe risers.
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Yeah, that's what I was trying to clarify for @Red Squirrel, that he can have two PSUs in a rig without actually daisy chaining/linking them. PSU2 can just stay turned on. And yeah, same, I tried to keep the load low, I've got two of those 850 Seasonic PRIME platinum's, they're stupendous. Got two more for my actual gaming rigs.
 
Yes, always power the 6/8 pin plugs of a GPU and the riser it's connected to from the same PSU for safety reasons. And if you have a motherboard that has extra molex sockets on it for excess PCIe 1x slots, power all of them plus all other power connectors on the board from a single PSU.
 
So, how much of your Ethereum are you holding onto, and how much are you trading for Bitcoin or USD to spend or invest elsewhere?

I'm not sure if when "the crypto crash" is coming, or if/when it's going to recover. For all I know, it might already be happening.
 
I changed all my ETH holding over to BTC. I still mine ETH directly when not playing around in Blender, I’ll keep those earnings as ETH I think.
 
I think it is unwise to change ETH into BTC. I think ETH has better long term prospects than BTC. If you take a look at 1 year chart, BTC is 10x what it used to be a year ago, but ETH is 100x what it was a year ago. If you have been converting ETH to BTC over past year, you've been losing out.
 
Probably good to convert some, as it gives you a bit of diversity. But yeah would not convert it all. I think it will be interesting when eth goes to PoS. Wont be good for miners but may actually be good for the coin itself.
 
Maybe, but I'm starting to think that Bitcoin doesn't have much of a future. Even if lightning network can reduce transaction fees its proof of work nature is becoming a big drawback as more and more power has to be expended to keep the network going. All the new crypto are moving to proof of stake or proof of importance algorithms. I think it is much more likely that Bitcoin will become the AOL/MySpace/Yahoo of the early dot com era, it has shown us what's possible, but ultimately it will be replaced by something much better. The only way I see bitcoin staying relevant in the future is if people will adopt it as digital gold replacement, it doesn't have any other utility.

But of course, this is just my opinion, take it for what it is.
 
I prefer BTC because it’s actually spendable outside of exchanges. I never got into this as an investment or to make money, too much stress for my taste. I think the reason I’ve been able HODL for so many years in fact is because I’ve never spent a dime on it 😎

But I do see the value in ETH, and agree that it has huge potential. But to say BTC has no future is a bit out there. Bitcoin has mindshare and staying power, the value of which shouldn’t be underestimated IMO.
 
Yeah I don't see BTC going anywhere. If anything it's big enough that even the news talks about it, so general public are more exposed to it. Some companies even accept it, like KFC.

I could see the other currencies act as a vehicle to get BTC though. What I do wonder is what happens when all the BTC coins are mined. There actually is a limit. With fiat, there is a limit, but they can just print more when it's needed.

Then again I guess things like gold etc have a limit too, eventually it will all be mined without reasonable means.
 
Has anyone figured out why the 1080 has so much lower hashrate than the 1070, and 1070ti?

My 1070ti is easily cranking 30Mh/s while my overclocked 1080 is hanging in around 23Mh/s. Kindof irritating.
 
Red Squirrel said:
What I do wonder is what happens when all the BTC coins are mined.
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Not that it really matters. I think its at 16 million out of 21 right now, and the projections are that it'll take something like year 2145 to get all 21 million. It'll take longer for Bitcoin to get to 21 million than it took for vast majority of the modern technological advancements.

Assuming you are in your 30s, its hard to say even your great grandchildren will be alive by that time. Renders it all moot, because plenty of things can happen in less than 5 years, nevermind 130.
 
IntelUser2000 said:
Not that it really matters. I think its at 16 million out of 21 right now, and the projections are that it'll take something like year 2145 to get all 21 million. It'll take longer for Bitcoin to get to 21 million than it took for vast majority of the modern technological advancements.

Assuming you are in your 30s, its hard to say even your great grandchildren will be alive by that time. Renders it all moot, because plenty of things can happen in less than 5 years, nevermind 130.
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Oh wow did not figure it was going to take that long. I guess with the difficulty increasing it does exponentially go slower to mine.
 
fleshconsumed said:
The only way I see bitcoin staying relevant in the future is if people will adopt it as digital gold replacement, it doesn't have any other utility.
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this is more or less the way i see it going. still directly spendable at retailers if you dont mind the fees and wait for confirmations (ie high value purchases). also its seems to be the main gateway in and out of the crypto space. but mainly its a store of value.

2ndary layers like lightning are for day to day stuff. or something like litecoin perhaps.

eth is not really a currency imo, its a way to move value via smart contracts. and smart contracts are not needed to buy a cup of coffee.
 
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