5xxx series availability issues? How about going with 6770 cards then? They're very cheap VLIW5 cards, priced at slightly over 2/5 of what a 6950 costs here in my neck of the woods. I've been running a couple of Sapphire 6770/512 MB cards for 7 months with no failures, each of those little beasties overclocked to 995/300 without any overvolting resulting in slightly over 230 MHash/card. Originally, I clocked them at 1000/300 but that would result in a couple HW errors/day (no hangs). 1010/300 was unstable. I couldn't help but laugh and pick the "BFL PROFESSIONAL product" in your survey meaning should BFL ever release a professional product, go for it  As to receiving free power as part of one's benefits, hello you Americans, welcome to Europe  I'm just wondering, what do the benefits of coffin manufactury workers are? I'm betting oblong. I always thought the 6xxx series are much worse than the 5xxx series because of less shaders and crappy VLIW4 not VLIW5 like the 5xxx with SDK 2.1 and downclocked memory. |
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if you're not paying for electricity essentially then a 5830 would be worth it if you can find them, £60-£80 for around 300Mhash
The problem with these older 5xxx cards is availability. It's like they've gone straight extinct. Wonder if the gamers dumping them for 7xxx or GTX 7xx will solve some of this. LOL! And working for power company = free electricity -----> MASSIVE LOL! You can LOL all you want but that's the way I get it. Let's not go more off topic than this. |
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if you're not paying for electricity essentially then a 5830 would be worth it if you can find them, £60-£80 for around 300Mhash
The problem with these older 5xxx cards is availability. It's like they've gone straight extinct. Wonder if the gamers dumping them for 7xxx or GTX 7xx will solve some of this. |
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Remove that junk ASAP.
CGminer is awesome !
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What? That's Chinese high quality assembly!  On a more serious note, as long as the solder joint is ok a electrolytic cap sitting a bit crooked won't affect anything other than looks. LOL.  I think that is fine. Won't affect anything much. |
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These are being marketed on their website for applications other than bitcoin mining, although it is very specifically targeted at bitcoin right now it seems. But since it supposedly can do other tasks, I am figuring that it could have resale value even if bitcoin crashed and burned. I would be very interested though in what else it can actually do with a different bitstream, since the actual applications are limited by having only a USB connection. As I have mentioned before, it looks like it would be perfect for a tiny portable WPA crack-in-a-box. Wonder how much of an OS the little supporting chip could run. That. Unless the scammers tell us what the chip behind the heatsink is, we will never know. Strange they are only pushing it for us and not for other applications. |
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I think grounding them together is the best way to prevent power fluctuations and other such stuff. I'm no expert but that's what I heard.
I don't mean to sound offensive here but I remember clearly you claiming to be an electrician. ...I work for a local power company as an electrician. No stolen cables or altered meters etc. ...
If you do work as an electrician and are no expert at what you do, God save the Queen Well there's always the disclaimer : if your GPUs / stuff blows up don't blame me  |
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Well, we can get all wet about the power figures but the prices and performance / price ratio still sucks big time AND ( biggest of all ) we still have not seen Nvidia's 28nm arch and products.
I just pray every night they woke up and decided to make a BTC mining card this time around !
Doubtful. AMD went to a more Nvidia like architecture as the trend is towards more complex shaders. Games aren't growing in pixel or polygon count (or at least not growing exponentially). The push is into more complex and realistic effects on the same number of pixels/polygons. That means more complex shaders are more efficient. NVidia moving to a less complex but more shader architecture simply makes no sense. Also for everyone except those w/ free power what matters is TOTAL LIFECYCLE cost. Capital cost + electrical cost IMHO the best way to look at that is cost per PH (petahash). 5970 runs $300 used, pulls about 250W, and gets ~750MH/s. For someone (like me) w/ ~$0.10 electrical rate if we estimate the card will have a 36 month effective lifespan then 750 MH/s * 60 * 60 * 24 * 30 * 36 = 69984000000 MH or ~70 PH Lifecycle cost is $300 (capital cost) + 250/1000 * 24 * 30 * 36 *$0.10 = $648. (electrical consumption is 2/3 of total cost). $948 total cost / 70 PH = $13.55 per PH That is all that matters can a new product get better price per Petahash. Really nice way of putting it. But what about the 7970 price per Petahash ? |
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I have personally done this and am satisfied with their answers.
gigavps, can you say us when they are gonna ship your unit(s) ? best regards. spiccioli 4-6 weeks. LOL. Same old story. 4-6 weeks since October last year ... With the performance and efficiency of the 7970s I don't think many are going to be jumping onto the BFL fail train. With the GPUs you can mine and game and crack encryption but these BFL units have close to 0 resale value and you cannot game or hack with them. Add to that the fact that if a competing ASIC is designed you pretty much are screwed as they become paperweights and you won't get anyone to take them off your hands. Might as well use the money to straight out buy BTC ! If I had the money, I would buy some units myself but I would really think carefully before getting 10s or a whole farm of these devices, especially considering their lame 6 month warranty. |
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Well, we can get all wet about the power figures but the prices and performance / price ratio still sucks big time AND ( biggest of all ) we still have not seen Nvidia's 28nm arch and products.
I just pray every night they woke up and decided to make a BTC mining card this time around !
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What kind of total monthly/quarterly consumption do they give if I may ask?
Let's just say that running 10kW 24/7 won't be a problem. But so far I am not really using any of that. Maybe I should start a mining company on GLBSE if I can find the time for it ? Then you can kill FPGA from your list. They would be pointless. A 5970 will produce ~$120 per month at current difficulty/price ratio. Even @ $600 per card you are looking at a 5 month payback period. Simply buy as many cards as you can afford (and are willing to risk) that have the lowest $/MH. Done. Given the bad price of 5970s then 7970 are likely you best bet. If it were me in that situation I would buy one to experiment.Yes thing is a 5970 is 400 GBP and around 840 mhash or less a 7970 is 420 GBP and around 700 mhash or more so 5970s still come out ahead. Not many choices right now. |
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What kind of total monthly/quarterly consumption do they give if I may ask?
Let's just say that running 10kW 24/7 won't be a problem. But so far I am not really using any of that. Maybe I should start a mining company on GLBSE if I can find the time for it ? |
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I think grounding them together is the best way to prevent power fluctuations and other such stuff. I'm no expert but that's what I heard.
When you shorted the mobo, did it die afterwards ?
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If you have free/stolen power then who cares. Any card is a good deal.
All that matters is MH/$. With no electrical cost just about any card if profitable in 6 months.
As I said before I am not "stealing" any power or making others pay for it. I work for a local power company as an electrician. No stolen cables or altered meters etc. So how is that an answer to the question WHAT IS YOUR ELECTRICAL RATE. That is the most important factor going forward. The capital cost for GPU is immaterial to the never ending electrical cost. I ask "What is your electrical rate"? You answer: "Electrical rates don't really matter to me ( I work for the power company )" WTF does that mean? Electrical rates are currently 0.00 ( benefits package from the company up to a set amount of consumption eg not really unlimited but good for a mining farm ) |
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If you have free/stolen power then who cares. Any card is a good deal.
All that matters is MH/$. With no electrical cost just about any card if profitable in 6 months.
As I said before I am not "stealing" any power or making others pay for it. I work for a local power company as an electrician. No stolen cables or altered meters etc. I really envy you over in the US getting a 5970 for $300 with warranty and all that etc. I really am unsure how to invest in mining from here on, hence this thread. |
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Got them undervolted to 890mv @ 925mhz...
Try and get them at 0.9V and at 1125 MHz ! What BIOS did you have to use ? |
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Worse you aren't going to get 840 MH on a 5970. Not without massively overvolting it and likely cooking the VRM within a year.
More like 750 MH/s.
What is your electrical rate?
Electrical rates don't really matter to me ( I work for the power company ) And yes, here in the UK-EUSSR we pay around double what you pay for a 5970 in the US. |
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Here is how I see it :
-no other 5870s on sale on eBay or Google under 200 GBP and even above that I could not find only at 300 GBP maybe
-79xx series will be crap for mining right now and at prices of 420 GBP for 700 mhash/s ( ratio is 1.67 )
-BFL Labs may be a scam and even if they are for real then it has 0 resale value and no other uses like gaming or encryption breaking so very risky etc.
-5970s are going on eBay for about 400 GBP and get a maximum of 840 mhash/s so that ratio is 2.1 which is crap as well
Any more suggestions ? What are you going to mine on in the future ? 5xxx cards ?
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Pretty much spot on mate.
I would drop the LTC as that is botnet territory right there.
BTC > NMC > SLC
the rest are pretty much a scam ( SLC being the biggest scam of all ).
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So what's your reason for going FPGA, do you live in an expensive KWh country?
I think 28nm Artix-7 FPGA's will be available in a year or so. It will be too late. Too late for what? I think they have plans for developing a custom BTC mining ASIC. At least that is what the rumor mill has been saying. |
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