Cryptocoin Mining?

[crashtech]

Damn ASICs spoiled my fun! :|

 

[philipma1957]

Damn ASICs spoiled my fun! :|

amen to that bro. At my peak I was making 100 usd a day.3 or 4 days in a row when price went nuts

 

[wbynum]

Down to $11 or so per day net running six 7970's and four 7950's. Only reason it is still profitable is because of my low electric rate (9 cents per KWH) and 8 of the GPU's are in the garage. If I was pumping all that heat in the air conditioned house it would not be worth it.

 

[philipma1957]

Down to $11 or so per day net running six 7970's and four 7950's. Only reason it is still profitable is because of my low electric rate (9 cents per KWH) and 8 of the GPU's are in the garage. If I was pumping all that heat in the air conditioned house it would not be worth it.

9 cents i am at 16. 9 would be nice

 

[birthdaymonkey]

Damn ASICs spoiled my fun! :|

Yeah, the fun was the best part. There may never be another time when I'll be able to honestly say, "But, hun, this GPU upgrade will MAKE money!"

 

[TheUnk]

Next diff increase already estimated 20%, and it only goes up as we get closer...

 

[Chiropteran]

I am going to just be braking even after the next increase. I'll probably shut down most of my miners when the Change occurs

 

[Remobz]

Is bitcoin mining really worth all the time and money spent?

 

[SheHateMe]

I was thinking about picking up a second 7950. I barely get on the computer to do anything anymore, so I was going to try out this bitcoin thing since electricity will be free for me this semester.


Sounds like there is no point now.

 

[Binky]

I was thinking about picking up a second 7950. I barely get on the computer to do anything anymore, so I was going to try out this bitcoin thing since electricity will be free for me this semester.


Sounds like there is no point now.

A 7950 can generate about $2/day in revenue right now. The coins per day is dropping fast, but the price of bitcoin in the future is unknown, so the future $/day is always unknown.

With free electricity the only concerns are hassle, heat, and noise.

 

[SheHateMe]

A 7950 can generate about $2/day in revenue right now. The coins per day is dropping fast, but the price of bitcoin in the future is unknown, so the future $/day is always unknown.

With free electricity the only concerns are hassle, heat, and noise.

So with 2 7950's I should be able to get $4/day


What if I put a slight overclock on both of them?

What will a 7970 get?

 

[wbynum]

Even with free electricity, don't under estimate the noise factor. While mining the GPU fans will sound like jet engines. Depending on your living situation that could be an issue.

 

[Chiropteran]

Is bitcoin mining really worth all the time and money spent?

The time investment is rather minuscule if you do it smart. You might spend a couple hours setting up in the first place, but after that it simply runs and at worst requires a couple minutes once a week to restart failed machines.

As far as being worth the money, very much so, in the past. However, as bitcoin difficulty increases, it looks like it may become unprofitable for anyone who pays for electricity, in the next month.

 

[philipma1957]

So with 2 7950's I should be able to get $4/day


What if I put a slight overclock on both of them?

What will a 7970 get?

never overclock always underclock for mining even with free power.


clocks like .95 volts 900 mhz core and 1.5 volts 750 memory are much easier to maintain . then a 1.1volt 1050 mhz core with 1.6 volts 1000 mhz memory .

this is true 90% of the time

 

[crashtech]

never overclock always underclock for mining even with free power.


clocks like .95 volts 900 mhz core and 1.5 volts 750 memory are much easier to maintain . then a 1.1volt 1050 mhz core with 1.6 volts 1000 mhz memory .

this is true 90% of the time

It depends. I sometimes undervolt my 7970, but never underclock. The lowest setting I have needed to use so far is 1020MHz @ 1.093 VID, actual being somewhat less of course (not in front of it right now, so can't say*).

I commonly vary clock speeds and voltages according to a chart and the expected ambient temps. The chart has to had to be remade several times after CPU and driver upgrades, but with it I am pretty well in control of the peak temps, which I do not ever want to exceed 75°C (just personal preference) aiming for an average operating temp of 70°.

EDIT: It's 1016mV, if it matters.

 

[Binky]

My $/day above already assumed overclocking to about 1050mhz or so. With free electricity, I don't know why you wouldn't overclock...assuming heat and noise are not a factor (which is a huge assumption).

My dual 7950's in a well ventilated case run very well at the following voltage/core speed combos:

0.95v/950mhz
1.0v/1050mhz
1.01v/1070mhz-1000mhz (main card at 1070mhz, 2nd card at 1100mhz)

I don't try to run higher than this because it pushes my top card over 77C, which is really abouy my limit. I like them in the mid 70s.

All of these speeds use memory at 1.5v and 625mhz or less.

The top/primary card always runs MUCH hotter in a case, maybe 6C-9C higher.

 

[philipma1957]

I have been ruuning a 10GH/s gpu farm heat and noise and watts are huge factors. it is now down to 6.6ghs



I have 1 board with 3x hd7970's pulls 430 to 470 watts at around .95 volts a card and 910 mhz core.

Oh I can crank it to pull 600 watts hashing 1750 to 1850 but I am hashing 1550 with 460 watts as I type runs cooler.


1 board with 4x 7790s these can be overclocked . they are at 1150 mhz.

I have one board with 2hd7790's and 1 hd7970 .

these are mixed the hd7790's the core is over clocked.

In my garage right now I am hashing about 5.2 gh with 6 pc's that use 10 hd7790's and 6 hd7970's. it is hot and noisy and at my power prices 16 cents a k watt I have to try to be more efficient. I could push the gear up to 7.6ghs but the 1 gh boost would be at a price of close to 1000 watts.

at 6.6 ghs
16 cents a k watt
2300-2400 watts
15 mill diff
110 usd a coin

I make 14 usd a day after power
(minus 4 bucks for ac)
so 10 usd today.
______________________________________________
at 7.6 gh
16 cents a k watt
3300 3400 watts
15 mill diff
110 usd a coin

I make 11 usd

(minus 5 for ac)

my net would be 6 bucks
________________________________________________

well the end is near. if it was oct 1 first the ac loss would be a heating gain. and I could continue , but right now time is almost done.,

 

[Chiropteran]

my net would be 6 bucks

You have a far more scientific system than me.

I mined a total of 3.6 bitcoin in may (payouts set at .30, 12 payouts during the month of May).

My electricity bill for May is $305.03 However, I know I use about $100/month with zero mining, so I attribute $205.03 to mining electricity cost.

3.6 bitcoin has a value of approximately $392.40

Roughly calculated, net profit $187.37

Next month very rough estimate- multiply daily bitcoin income at btcguild by 30 days- 3.3 btc. multiply 3.3 by .79 (next difficulty increase)- something around 2.6 bitcoin earned. Based on power usage last month, my income goes down to about $80 for the month. If difficulty increases continue at this rate and value doesn't increase, July would be a net loss.

 

[philipma1957]

You have a far more scientific system than me.

I mined a total of 3.6 bitcoin in may (payouts set at .30, 12 payouts during the month of May).

My electricity bill for May is $305.03 However, I know I use about $100/month with zero mining, so I attribute $205.03 to mining electricity cost.

3.6 bitcoin has a value of approximately $392.40

Roughly calculated, net profit $187.37

Next month very rough estimate- multiply daily bitcoin income at btcguild by 30 days- 3.3 btc. multiply 3.3 by .79 (next difficulty increase)- something around 2.6 bitcoin earned. Based on power usage last month, my income goes down to about $80 for the month. If difficulty increases continue at this rate and value doesn't increase, July would be a net loss.

yeah I did well but unless price goes up I am going to stage an ebay sale come july for about 5 pc setups.

one thing I did was make the systems be able to run as a ht or a gamer.

so I should be able to get rid of them at decent prices.


my worse bill was last months it was 535 usd I mined about 11.5 coins.

lets say 1300 minus 400 = 900 for may


apr the power bill was 400 usd I mined 15.5 coins lets say they were about 2600

my best month profit of 2200

 

[Keysplayr]

Sounds like FS/FT is going to be loaded with 7950s and 7970s soon.

 

[WhoBeDaPlaya]

Is bitcoin mining really worth all the time and money spent?

Hey, I got a bunch of 5830s and 7970s free after mining.
For that matter, people went nuts for my used FPGA miners on eBay. I sold them for more than what I bought them for

 

[Chiropteran]

I have a feeling that the used video card market will soon be flooded with AMD cards.

Was reading an interesting thread over on bitcointalk, regarding BFL jalapeno's power usage.

Electricity at $0.12/KWh (my approx power cost)

Electricity cost per YEAR: $38.00

Assuming current BTC price, the Jalapeno would need to mine less than 0.30 BTC per YEAR to be unprofitable

Profitable Until Difficulty >2 BILLION (>166x current diff)

Apparently it uses a bit less than 28W while mining away at 5.2Ghash/sec. My current mining opperation totals around 3.2Ghash/sec, and I'd estimate that it uses 2200W of electricity. It's kind of amazing how much more efficient ASIC are.

 

[TheUnk]

I have a feeling that the used video card market will soon be flooded with AMD cards.

Just put mine up on eBay.. They will still be profitable for a few more difficulty changes, but not enough for me to constantly be worrying about bitcoin value which isn't doing so well lately..

 

[philipma1957]

I have a feeling that the used video card market will soon be flooded with AMD cards.

Was reading an interesting thread over on bitcointalk, regarding BFL jalapeno's power usage.



Apparently it uses a bit less than 28W while mining away at 5.2Ghash/sec. My current mining opperation totals around 3.2Ghash/sec, and I'd estimate that it uses 2200W of electricity. It's kind of amazing how much more efficient ASIC are.

I do have 4 units on order I paid for the boost to 7Gh on 2 of them and kept the other 2 at 5Gh total of 24Gh should use 110 or 120 watts. I got them at the old prices so I spent 824usd.

Still waiting for my orders to come up and I have a while I have Jan and March 2013 orders.

They have so far done JUNE JULY and AUGUST 2012. They started shipping May 22nd of 2013.

 

[ozzy702]

Would it be possible for amd to add asic capabilities to their gpus? I just have to imagine they will lose a lot of market share now that mining is no longer a reason to buy amd. I for one would go back to nvidia just so that I can enjoy multi gpu gaming again.