sorry for being such a newbie but what is stock cooling and how do you open the case for a 7990? I have two xfx 7990 but temps gets to as high as 95 degree C with a hash rate of around 500MH/s.
Can someone please help me with the best configuration to maximize hashing power.....I did pay big $$$ to get them..thanks
Stock cooling is the cooling already on the card. As for people referring to open case they generally mean taking the side(s) off of the computer case. For dual 7990 you also want a big fan aimed into the general pc case, 500Mhash sounds like they're throttling back due to getting too hot! |
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Get a silver kill coil and distilled water to handle any biocide requirements. What is an anti-conductive additive? Short of using something like fluorinert I don't think there is a way to prevent the water from ionizing given the constant contact with copper.
I was posting from memory but I think I actually meant non conductive additive (as in it doesn't suddenly turn the water conductive) - I once filled up a loop and the pushfit fitting were dodgy - ended up soaking a 6800 Ultra + motherboard but they both survived! Can't remember exactly what it was, was blue if that helps  Btw a chiller to handle that sort of loading would be ridiculously expensive, the good thing about a water loop is that if the temps are too high at first try you can just keep adding radiators or more powerful fans till the cooling is sufficient. You can also use it for underfloor air heating with rigs like that  |
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I don't actually own one of these as they are way overpriced even at the new lower price.
But every screenshot I have seen show lots of hardware errors when mining.
Isn't that a sign that they are already overclocked way to high?
It could be a simple power supply issue as well, I plan to feed it power independently of the usb key. "FOR SCIENCE" You can only mine SHA256 coins btw, not other alts. As for this - the chips themselves run on <2v so it may be a regulator limit and supplying more amperage on the USB socket/5v line may not actually help at all. Anyway, would anyone with one already care to read off the crystal speed? Also the voltage regulator part number would be interesting, voltage reading even better, and maybe a current reading of what is being pulled over the USB. Then we could work out exactly how much headroom we have. An unlimited current supply on the 5v might help if the regulator has a decent amount of headroom. |
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First buyers in the moment would break even their MHz cost in ~16 hours while the new buyers would break even their MHz cost in just ~8 hours!
This is really bad news for the first buyers!
I think your calculations are off by over 2 orders of magnitude! 333Mhash only generates 0.00288 per 8 hours, not 1! |
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Some of you are already aware of this, but for the rest:
cryptsy.com has delisted DVC/BTC, and added DVC/LTC
Interesting, bet they thought they might run out of decimal places. Anyone received any share payouts yet? Want to invest some of mine. |
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You need an 8 PCI-E slot mobo. The MSI Big Bang Marshall comes to mind, it's expensive.
Otherwise MSI-Z77A-GD65 will run 7 cards without issue. Using power risers.
Last I checked AMD APUs didn't fit in a land grid array with 1155 pins.... |
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If I have eight AMD 7970 GPUs and one AMD A10-6800K “Richland” APU, what kind of motherboard would be the best? Please give links to their product pages, etc! Thanks!  Just a heads up no matter what board you get you'll definitely need some powered risers to stop the ATX plug and motherboard traces from burning out (literally). |
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Probably if they sold them on exchange. It would be much more likely that sales of this kind of magnitude be done either offline by selling the entire wallet and having proof of trusts set up to prevent the original owner from stealing them. Also they could just be transferred and the payment be made offline. I think Yifo alluded to both of these possibilities during a talk.
It wouldn't be in their interest to disrupt the price anyway since their units' ROI would go down and less people would want to buy them.
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The technical way to do it would be to use a digital multimeter to check if there is an electrical connection between the molex pin and the PCI-E pin responsible for power supply.
If you really wanted to be sure you'd break that connection somewhere along the power cable and put the multimeter in to fill the gap and measure the current flowing down it.
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Those are a bit dear! I'd be going for these cause copper doesn't transfer heat to the air very well either. http://dx.com/p/aluminum-cooler-heat-sink-chipset-for-ram-memory-w-type-8-piece-set-35816You could just stick a load to the top 'heatsink' side if they dont fit on the little chips on the other! This is pretty cool tho:  RPi sandwiched between a USB hub and LCD shield. It's doing a lot better than my Pi which can get about 0.47khash on litecoin... |
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7750s. Seem to be the most efficient. Is LTC GPU mining a good investment now? How much more will I make compared with bitcoin? 50% right now. www.coinchoose.com |
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A sell it will by then. I still have a 50ghz in order that maybe arrive in sep or okt but also depends how big its gonna jump the coming few months.
First gonna wait for me tracking number for selling it.
No you don't its GigaHash, not GigaHertZ. Unless you think its cool to refer them as to GigaHasheZ.  |
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FPGAs exist for scrypt
Really? Can you prove that? |
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5ghz? holy shit you should mine with that, world record clockspeed right there.
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Because, although not announced yet, we'll offer the warranty that if they do not recover the money in 6 months, we will replace them with ASICs that will.
Is this still valid? |
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You can also disable any extra cores on the cpu which can reduce power draw significantly, it's the difference between my rig not booting and being able to run a 7970 at 1085/1500 mining litecoin.
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I use teamviewer to access the miner I've left in uni halls, ver useful cause it gets straight through their firewalls which disallow server and various other remote connection methods. Teamviewer works just fine.
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I will start from scratch and use Verilog coding. I will make custom circuits for everything to get the max performance. Timing analysis will be key in this project. Meeting all set-up and hold times with guard band will take some time, and will be a pain. But the good thing, there are multiple phase that can be used. I will start on the project after I get the first release out of my WinMiner/Dominatrix project. With the Dominatrix Engine, I already have a software platform that I can tie in the FPGA too. Depending on the performance I get out of the FPGA, will depend if I release the code to the public. If I get awesome performance, then I will keep the code. If I get OK performance, then I will release the code to the public for free.  Interesting, but what do you hope to gain by keeping it closed source? And you might need a bigger heatsink than than! |
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This is by far the most elaborate website I have seen for a hoax, really unbelievable how far some people will go.
How is it unbelievable? They've made a ton of money off this scam. One site determined they had 100+ orders @ $15k a pop. They even have a kickstarter project that had $200k+ last time I saw it. The product is unbelievable and plain ridiculous so I don't really feel sorry for the scam-ees cause they must be really stupid to drop 15k on one of these. |
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