Cryptocurrencies

What cryptocurrencies do you use/own?

  • Bitcoin (XBT)

    Votes: 30 27.8%

  • Ether (ETH)

    Votes: 16 14.8%

  • Litecoin (LTC)

    Votes: 15 13.9%

  • Peercoin (PPC)

    Votes: 0 0.0%

  • Dash (DASH)

    Votes: 3 2.8%

  • Dogecoin (XDG)

    Votes: 4 3.7%

  • Blackcoin (BLK)

    Votes: 0 0.0%

  • Zcash (ZEC)

    Votes: 3 2.8%

  • Other

    Votes: 14 13.0%

  • None

    Votes: 69 63.9%
  • Total voters
    108
Barcelona said:
Less $44,990 for electricity... Lol
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haha .... it would certainly be a sizeable bill!

Well ...

200 cards @ 200W would be 40kW

40kW continuous for 1 month would be (40 x 24 x 30): 28,800 kWh

I don't know what electricity typically costs in the US but going off UK prices, let's say somewhere between $0.10 and $0.20 per kWh.

@ $0.10 = $2,880 per month

@ $0.20 = $5,760 per month

So, realistically, you may be left with a mere $40,000 per month after electricity costs.
 
A bit more info on what happened here:
http://uk.businessinsider.com/ethereum-flash-crash-explained-gdax-2017-6?r=US&IR=T

ZenTree said:
This just days after the bbc (I think it was them) did an article on comp sci uni students investing all their loans in ethereum... That's going to hurt.
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It wouldn't affect anyone investing in Ethereum because it was just a brief dip on a single exchange. It should only affect those who were trading on that particular exchange when it happened, especially anyone who had automatic 'stop-loss' sell orders placed. I suppose the lesson here is not to place such low stop-loss orders.

The ones who gained from this will be those who had very low automatic buy orders placed. Some traders must've grabbed an absolute bargain!
 
Moltuae said:
200 cards @ 200W would be 40kW

40kW continuous for 1 month would be (40 x 24 x 30): 28,800 kWh

I don't know what electricity typically costs in the US but going off UK prices, let's say somewhere between $0.10 and $0.20 per kWh.

@ $0.10 = $2,880 per month

@ $0.20 = $5,760 per month

So, realistically, you may be left with a mere $40,000 per month after electricity costs.
Click to expand...

Hmm. If you built 6-card rigs for, conservatively, what, about $6,000 each? 200/6*6000 = $200,000 startup cost; that's a 5-month ROI, not including the cost of a divorce lawyer. Maybe you could find an attorney who will take Bitcoin as payment!
 
Moltuae said:
haha .... it would certainly be a sizeable bill!

Well ...

200 cards @ 200W would be 40kW

40kW continuous for 1 month would be (40 x 24 x 30): 28,800 kWh

I don't know what electricity typically costs in the US but going off UK prices, let's say somewhere between $0.10 and $0.20 per kWh.

@ $0.10 = $2,880 per month

@ $0.20 = $5,760 per month

So, realistically, you may be left with a mere $40,000 per month after electricity costs.
Click to expand...
I'm in South Australia, so typical electricity prices are much higher.
$0.03327 Peak
$0.03753 Next Peak.

About $0.02 between summer/non summer.
 
My GTX 1080 Ti arrived today. I'd like to keep it and the GTX 1060 running in my system, but not about to try installing them side by side on the motherboard.

Any recommendations for risers?
 
timeshifter said:
Any recommendations for risers?
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We've mainly been using the risers that use USB cables, like this: https://i.imgur.com/xrpe0nD.jpg
Those are generally reliable but you may want to glue everything in place (using a hot-melt glue gun) to improve system stability. The USB cables are quite rigid and can cause the fairly loose-fitting connections to move. Build quality varies a lot with most risers but especially this type it seems. We've had a few that wouldn't work. On peeling back the foam rubber base we discovered appalling solder-work. You may need to order from a few different suppliers to find ones with consistent build quality.

I've also experimented with ribbon-risers like this and this. Again, quality can vary a little here. Both of those are the powered variety (using a molex plug). I've found that some cards will work without PCIe power (taking all their power instead from the 6/8 pin plug) but in general I think it's better/safer to use powered risers. Ribbon risers do seem to work quite well but they're generally much shorter than the USB type, so it's not always possible to use them depending on the layout of the rig.

On rigs of 3 cards or more, plan the card and riser power feeds carefully, making sure you don't have too many cards splitting off from the same cable/connector. Remember that some of these cards are pulling over 10 amps each, so it's easy to burn out a cable or power plug if you don't spread the load carefully.
 
Just installed the new GTX 1080 Ti and started running NiceHash again. Currently showing $7.33 / day. Burning 330W. At 10 cents per kWh that's about 79 cents per day.

The GTX 1060 6GB card in the same PC was showing about $3.00 / day using 175W, or 42 cents per day.

Note that the above numbers are for a simple, older i7 PC with just an SSD and a single GPU. I think I need to look at PSU efficiency. Current PSU is Bronze rated.
 
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Trying to figure out now what I would need to build a 4 card GTX 1080 Ti rig. What I'm seeing out of the box is 250W of consumption for just the card I installed. I recall that my system drew about 80W when idle. 250W + 80W = 330W. For a 4x rig that would mean 250W x 4 or 1000W for the cards, plus another 80W for the base system for a total of 1080W.

So would you recommend a 1200W PSU?
 
timeshifter said:
Trying to figure out now what I would need to build a 4 card GTX 1080 Ti rig. What I'm seeing out of the box is 250W of consumption for just the card I installed. I recall that my system drew about 80W when idle. 250W + 80W = 330W. For a 4x rig that would mean 250W x 4 or 1000W for the cards, plus another 80W for the base system for a total of 1080W.

So would you recommend a 1200W PSU?
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You're getting slightly ahead of me. I plan to build a multi-card GTX 1080 rig but haven't gotten around to it yet. I'll probably be ordering the hardware over the next couple of weeks.

I haven't measured the actual power consumption of a 1080 yet; we've only had one of them running briefly so far. I believe they are around 250W out-of-the-box but more like 150W after a little optimising/tweaking for mining. I think this is roughly the performance tweaks we made: https://www.reddit.com/r/BitcoinMining/comments/65erwo/mining_with_gtx_1080_ti/

Using those tweaks we saw a drop from 250W to 150W with no significant drop in mBTC/day. We were relying on the software stats though; I need to get a power meter on the rig to confirm.

Assuming the figures are correct, with all 4 cards pulling 150W you could get away with a less powerful PSU but it might be wise to use one that can handle the cards running at full power just in case.
 
A bit of a drop on NiceHash, screenshots of my results for approx Saturday:

NiceHash-Saturday2.png


Same screen on Sunday afternoon:

NIceHash-Sunda.png


Wonder why the drop. Maybe it's Sunday, I hope.
 
Anyone read (and understand) this:

https://bitcoin.org/bitcoin.pdf

That's a link to Satoshi Nakamoto's original paper "Bitcoin: A Peer-to-Peer Electronic Cash System". Surprisingly it's only 9 pages. I feel like if I want to play in the space in a small to medium way then fully comprehending what's in this paper first, is a good place to start.
 
I think having a great big cool system like that is every techie's dream. You could have a massive warehouse full of cool machines, networked, wired nice and neat all humming a long. A great deal of satisfaction would come from building and operating a massive system like that. And, unlike traditional IT there is no idiot user clicking open every email attachment in their inbox.
 
timeshifter said:
Wonder why the drop. Maybe it's Sunday, I hope.
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NiceHash's profitability can fluctuate a lot. As I understand it, because they sell your hashing power, what they pay is largely dependant on what people are bidding for it: https://new.nicehash.com/marketplace


timeshifter said:
Anyone read (and understand) this:

https://bitcoin.org/bitcoin.pdf

That's a link to Satoshi Nakamoto's original paper "Bitcoin: A Peer-to-Peer Electronic Cash System". Surprisingly it's only 9 pages. I feel like if I want to play in the space in a small to medium way then fully comprehending what's in this paper first, is a good place to start.
Click to expand...

If you want a good (and very technically in-depth) read, I'd recommend getting a copy of Andreas Antonopoulos' book 'Mastering Bitcoin'. I have it in good old fashioned paper-back format for a bit of light night-time reading. For a less technical read, I believe his book 'The Internet of Money' is also very good, though I haven't read it myself yet.
 
I wish the card vendors would get on with making mining-specific cards. There is so much vitriol in the gaming community directed at the mining community. Wow.
 
Barcelona said:
You could also possibly use the residual heat for electricity generation?
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~1:20 in that video you could see the typical heat wave visual distortion and I don't know that it was an effect.

Right now I think the best entry card for people might be the 1050Ti their calculator doesn't say what memory size but I can only find it in 4GB so assuming that is what they use it is ~$150 for the card and has a profitability with their calculator of about $55/month
 
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