Bitcoin Forum

Due to the new difficulty coming in 2 days, my mining rig (3 x 5830) will cost more power as BTC revenue.

It will be cheaper buying the coins ...

for information:

Power consumption of the 3 cards 300 Wh ( about 35 euros / month)
With about 900 Mh I get (now!!!) 0.7 BTC /month = 60 euros *0.7 = 42 euros.

game over! :-[

why not just turn direct it at something more profitable..... like litecoin, if i had a GPU rig i would have done this ages ago.... people like you are contributing to the ever increasing difficulty by not moving on   ;)

I don't understand people mining bitcoin with gpu  ???

Altcoins are 175% more profitable on average. Often reaching 200%.

When mining Bitcoin you can downclock your memory and save heaps of electricity. With scrypt coins you can't.

The game is not over! Bitcoin is not about mining! Mining is just there to secure the network.

If you got Time to point your Miner to the most profitable Coin, it still makes some sense
but you have to be up to Date with the newest Coins.

Wise move...move on !    8)

You can undervolt the same on SHA and scrypt

But then your GPU overclock is very limited.

Rubbish! With SHA-256 I can underclock my memory down to 150MHz. With scrypt I have to overclock to get good results.

Especially for you (dumbass): underclock allows undervolt. overclock ... not.

May I suggest my front-end program, Crypto Miners in Tray: https://bitcointalk.org/index.php?topic=149442.0
It can check profitability data from CoinChoose.com and fire the most profitable miner in your configuration.

I tried ltc mining for a week, mined about 8 litecoins, sent them to vircurex and exchanged to fiat. Problem is how do you get your money out. Also, yes theoretically you can make more money with altcoins but I didnt see it, during the 5 days of mining ltc.

Now, I am back to mining btc, much much better and more convertible even with monsterous difficulty and downward orice.

You can change litecoin into bitcoin and then send the bitcoins to your favorite exchange.

Mining an equivalent of about 0.7 BTC per 10 day period, when converted from LTC (2.1 LTC per day). When I stopped mining BTC directly two weeks ago, I was getting only about 0.4BTC per 10 days.

good for you buddy start bumpin it up!!!

You could always exchange them for BTC, then sell them locally on LocalBitcoins.com.

What is wrong with you ?

The main factor to reduce energy consumption is undervolting the core voltage. The core clock and the memory clock are something else.
Almost the same settings can be used concerning core voltage and core clock for SHA and scrypt. Only scrypt need much more memory clock.

You can undervolt AND overclock = reduce consumption while increasing hashrate. It is a matter of balance and testing.

Moreover, it doesn't matter that you increase energy consumption if your gain from mining altcoin is much higher.

http://bitchfest.tv/phpBB2/styles/prosilver/imageset/site_logo.gif

You guys are talking about two different things, and acting like their the same.

BTC can underclock the RAM, while LTC needs high RAM speeds. This is known. However, this has nothing to do with undervolting, as no one I know of undervolts their RAM. I think only a few handful of GPUs can even do it.

For undervolting, we're almost exclusively talking about core (engine) speed. The lower a core speed, the lower it can be undervolted. BTC mining needs a high core speed, so usually undervolting is out of the question if you're going for max OC for performance. You can sacrifice performance by lowering your Core clock and undervolting, which is what most people do at this point I think.

LTC can actually get away with a lower engine clock, IIRC, as it's the relationship between the core and mem that matters most, not the highest clock you can get. If you can get away with a slightly lower clock and still get max performance, you could prolly undervolt and save some power. However, the increased RAM speed will add a significant temp/power increase that isn't negligible.

Now kiss and make up.

Does under/overvolting have any significant impact on the power consumption of a GPU mining rig, anyway?

did you stop? ???

Yes. It has a greater impact than just changing the clocks.

A 10% decrease in voltage will decrease the power consumption by 19%.

not yet,

I will see tomorrow ...

I have my miner set at 0.5 btc payout ... i'm at 0.27 for now...

I'm just waiting until this 0.5 get paid..

power price raise by 5% in France in august, if BTC price remain stable, I will power off at least end of july.

Is it still profitable to mine LTC after all GPUs have (or are about to be) moved to LTC mining after today's difficulty increase?

LTC difficulty is still at 874, so yes, but it will surely rise.
Keep an eye on http://www.coinchoose.com/ or http://dustcoin.com/mining
If you are mining multiple alt-coins alongside BTC, you might want to use my front-end: https://bitcointalk.org/index.php?topic=149442.0

omfg... thats a big raise... its time for some asics buddy... and you prolly have a while to go before your payout thou! yur gonna spend yur payout on your power bill LOL!

Ok, due to recent BTC price rise , GPU mining is still profitable, will check again next diff change ...

keep me informed im intrigued how you are doing.

time to mine alt coins.

for real try ltc

I already stopped btc a few days, ago and as the above posts have suggested, I switched to alts (DGC)

I will continue mining until i get 0.5 BTC ...I'm at 0.4 for now ...

it will be not profitable in  about 2 days if nothing change on the BTC price ...

I'm will not mine altcoin, but I will buy BTC on exchanges if price range stays as for now.

So, it's done!

My small rig is stopped for now. 1 gh less in the network ... will not change anything.

I will carefully review BTC price, if it's going up again (depend on diff) I will mine again... I will not use time with altcoins.

It's just unfortunate that GPU mining becomes pointless right in the middle of summer

litecoins were created by some people who got pissed off that they missed the bitcoin mining early days.  I consider them along the same thing as forum gold.  Worth some money to some people, but otherwise worthless.

 
That said, when I get "tired" of using my GPUs (since I have ASICs now) I'll just go back to gaming, and my electric bill will thank me.

Too bad because some coins does 300% on average and hit 400%.

http://coinchoose.com/

Shh... Don't give him ideas.  ;D

remember when chinacoin went 1600%?

ah, good times.

Huh?

Summer is the primary reason that GPU mining becomes pointless for most folks. In the winter, these things give off lovely, life-saving heat! Especially if you run electrical heating (not really sure who does that, we all heat with natural gas up here in Canada, but I've heard it's done in other places)

In any case, the electricity being converted *almost* directly into heat by GPU mining is a benefit in the winter. (even if it only reduces your gas bill by a small bit)

On the other hand, running these little furnaces in the summer becomes a detriment as it requires even more electricity in the form of air conditioning to maintain a liveable atmosphere.

LOL, exactly. Unless the poster is in Australia. :)

We officially have a Heat Wave here in the UK, so I changed back to BTC mining on my GPUs.

The extra heat of the LTC mining was insufferable in the house.  I'll be back to LTC mining all winter, it raises the temperature of the downstairs rooms of the house by 3C.  Saves a fortune on kerosene.

I can confirm mining altcoins with 12X7950 I got around 300% profitability in july so far. So GPU mining is ok for me still. I have electricity at 0.08$ per Kwh, so when I pay electricity bill (gonna be around 150-160$), and if I exchange LTC mined in july, I can get 4Xelectricity bill. So I consider it ok, as 300% pure profit no job can make you in a month. I would like to have 120 and not 12 cards, but that is another story :).

Hello,

i am just wondering that i am in minus when mining 300% coins (selected from coinchoose),
i have tried nearly every coin at 300% + middlecoin and multicoinpool which have and switching function to the most profitable coin.

I get approximatly 0.02 BTC in Value per Day which is about 1,80€ (90€/BTC)
but my Powercosts for the overclocked HD 7970 which needs 0,365 kw (hole PC)
are 24h x 0,365w = 8,76 kwh per day at 0,249€ = 2,18€

So i am  ~ 0,38€ in Minus!

Even when i would use the Prise for business Current i where 5cent in minus.

I mean the 7970  (710Khash @ 305 watt) is one of the most efficent cards, so  what is wrong here ?

These are the longest two days I have seen... did OP quit mining already?

Well there's your problem...

I pay 0.1€/kWh, you do not have the same luck to access cheap power distribution networks.

http://www.coinwarz.com/cryptocurrency/?sha256HashRate=710&sha256Power=300&sha256PowerCost=0.3336&scryptHashRate=710.00&scryptPower=365.00&scryptPowerCost=0.3336

May I suggest you find cheaper power, or hold onto your bitcoin a bit more?

Thank you for your reply.

Offcource i could lower the system watt requierement from 60 Watt to 20 Wattt when i buy a multi PCIe board.
But even without the 60 from the system i would be 0,02€ in minus.

My goal is not to earn pennies :-) i need at least twice of the powercost so aas example (4,5€ = ~ 2,5€ Win per day) to get a Roi of 100 days for the graphicard (250€).

I planned to invste 1600€ in graphiccard mining. So i made a test first if it could be profitable.
But it is not :-( .
In germany we have a terror goverment ;-) which tripple taxed the powercost ! all taxes togever are ~66%
It is impossible to get a Kilwatt under 0,20 cent (0,27$) and not even with 50000kw/h per year offers.

Try to underclock and undervolt your card, the power usage is not proportional to the clock speed.

Ok thanks i will try it.

i set the memoryclock from 1900 back to standart (1375). it saves 8-12 Watt, and i am still at the same 710 Khash.

I will undervolt and see what happens. :)

I have free electricity.. I'll take em and put em to good use!

Where did you get "free" electricity?
it always cost money, only stolen if really free ;-)

If you anyway heat the house with aforementioned electricity, why not run it through a GPU and not an electric radiator. It's free hashing in that sense. I'll let my GPUs run until April next year...

The big yellow thing in the sky gives me free electricity (when averaged out over the year).

As per the poster above, the heat produced also helps heat my house in the winter, so I'm saving kerosene which is 65p a litre (and can use 1000 litres in a really cold winter).

Man I would be very glad if you send those GPUs to me. Just PM me if you want to dispose it and I am more than willing to accept those gifts.  :o

With the price that you are having to pay for power, it is unlikely that you will ever be in a position to make money by mining altcoins with gpus.

You are paying twice what most miners are paying.

The only thing that you can do is to try to find an additional value stream from your mining.

If you are lucky, you live in an older home in one of the colder parts of Germany and you can run your gpu in the winter time and reduce your heating bills. Effectively lowering your power cost.

You could also try to set up water cooling on your gpu and, with an indirect heating cylinder, use the hot water to heat up your domestic water supply. If you live in rented accommodation the hot water idea is probably not an option.

While those options might work for you, they are limited you can only use GPU heat to defray your existing heat requirements. To scale it into enough GPUs to make real money, you would have to own a whole apartment block and make everyone pay you for the warm air and hot water.

Hello,

thanks for the tips.

i stoped today with gpu mining. It makes no sense in my case.
I cant get better than 1,95 Mhash per Watt with my 7970 from Powercolor,
which is not enough.

I will sell the 2 cards on ebay, and buy the coins directly.
I already daytraded (or weekly) some coins in the past (1-2 BTC per coin,  2k€ atm). That works for me.

Unless i get free solar power i will not mine again.
(Solar investment ROI from mining, maybe i will think about it :-)

How about mining altcoins?