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1501
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Bitcoin / Mining / Re: Mining will always be barely profitable
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on: July 12, 2011, 05:56:19 AM
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Pardon my ignorance, but isn't it more profitable to mine today than it was when Bitcoins cost less than a half a penny a piece 1.5 years ago? The lack of profitability didn't stop the mining movement back then, and it's not going to stop us now.
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1504
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Other / CPU/GPU Bitcoin mining hardware / Re: mining with more than one card?
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on: July 11, 2011, 07:01:30 PM
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i've heard that crossfiring can reduce performance drastically, so i'm wondering how to use both cards independently
I was in the same boat a few weeks ago. All you have to do is plug the cards in, that's it. No need to Crossfire. Depending on your driver version, you might have to use a dummy plug in one of the DVI ports on the card(s) that aren't hooked up to real monitors though. |
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1506
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Other / CPU/GPU Bitcoin mining hardware / Re: 5830's, what mh/s are you getting?
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on: July 11, 2011, 06:51:01 PM
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i have the xtreme version and using sapphire trixx but it artifacts and just generally crashes above 965
It's probably just luck of the draw. I have a couple 5870s that are the polar opposites of each other when it comes to OC'ing. One gets fussy at anything over 980. The other one can chill at 1050 all day long. |
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1507
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Other / CPU/GPU Bitcoin mining hardware / Re: 5830's, what mh/s are you getting?
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on: July 11, 2011, 06:36:00 PM
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I'm running right at 315 MH/s @ 1010/300. I could get it up to around 325 MH/s by going to 1040'ish but I don't want to push the card that hard.
what? my core is unstable over 960~ what are you doing? I got one of those "Xtreme" edition Sapphire 5830s from NewEgg (one of the $109.99 dealies). I think in order for them to be "Xtreme" they have to have really good quality cores to handle the slightly higher clock rate. As a corollary this means they can be pushed to slightly higher OC levels as well. At least I *think* that's what "Xtreme" means. Or it could just all be marketing hype. Edit: Oh yeah, what Xtoro said too. I'm using AMD GPU Clock Tool to set the MHz, and it automatically pegs the voltage at 1.025 or something like that. I have no control over the voltage with that tool. |
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1511
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Other / CPU/GPU Bitcoin mining hardware / Re: 475+ Mhash/s 5870 - Voltage mod and overclock
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on: July 11, 2011, 05:48:41 PM
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I've been having a hard time keeping my 5870 below 80c with the fan at 100% atlhough that could be because as an eyfinity edition i have a rather small vent on the card (1/2 of one slot) i've been thinking about simply replacing the case side with a box fan though!  Do you have other cards right next to it in the case? If so, get one of those "vortex" type fans ($15 or so at Target) and force some air across your boards. It'll make a world of difference. |
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1513
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Bitcoin / Mining / Re: eBay update: prices coming way down
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on: July 11, 2011, 05:12:44 PM
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Just for the sake of discussion, so is that what it comes down to then?
That the people building entire rigs today should be considered the Bitcoin "faithful"? I'm not being sarcastic, I'm serious. When has mining NOT been for the Bitcoin faithful? 1+ years ago people were mining when mining represented a net LOSS in revenue due to running costs. They'd spend a few hundred on hardware and electricity and come away with a few thousand BTC worth maybe $50, IF that. If you could travel back in time, would you still give them the same advice you are now? |
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1514
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Bitcoin / Mining / Re: eBay update: prices coming way down
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on: July 11, 2011, 04:51:57 PM
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Seems the current going rate on eBay for a brand new 5830 is around $125 - $140, including shipping.
I'm looking at completed listings -- which is very important -- rather than what a few greedy sellers hope against hope to get. People can ask for $1000 all they want, but if they never get that price, the going rate isn't $1,000. Right?
I guess that explains why NewEgg still has 5830's in stock for $135 shipped. You simply can't make money at that price -- not by mining, not by reselling.
And let's not forget that even if you got $140, you have to take out eBay and Paypal fees.
"I don't understand why people spend $500+ on a mining rig. It's going to take you 20+ years to pay that off, if ever. You simply can not make your money back." -- some random nay sayer circa June 2010. |
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1515
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Bitcoin / Mining / Re: Mining will always be barely profitable
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on: July 11, 2011, 04:47:01 PM
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This. Ignoring future price speculation, there are really three stages of profitability for each person out there -
1) BTC price is much lower than electricity costs. Correct move is to sell their hardware.
2) BTC price is above electricity costs, below the level required to pay back the cost of hardware. Possible moves are to sell hardware, or to mine and hope for the price appreciation. Correct move is to NOT buy new hardware.
3) BTC is above both electricity and hardware costs. Correct move is to buy new hardware. I'm not sure if Stage 1 is, or has ever been, advisable. Following Stage 1 would have been absolutely ludicrous a year ago or so when 1 BTC was going for a half a cent. Perhaps in the future, there's a chance that Stage 1 might eventually become sage advice, but let's hope not. |
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1516
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Bitcoin / Mining / Re: Anyone else have their friends buy mining rigs...
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on: July 11, 2011, 04:27:34 PM
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Nobody builds rigs now in order to pay them off at today's exchange rates. They build rigs in hopes of paying them off with next month's exchange rates. The only person who can say whether building a rig now is foolish or not is Nostradamus.
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