I finally received all my mining rig parts and put most of it together last night (a few tweaks remain to get it operational apparently), but I was wondering...
I live in the U.S. and most circuits around my parts are either 15A or 20A. How much insane hashing madness is it safe to plug into one outlet (or actually - one circuit, consisting of many electrical outlets)? My PSU is 1250W, and I hope to run all three 6950s off of it - but have no idea how much power this will actually draw. No HDD - I'll be running Ubuntu 11.04 off of a thumbdrive (if I can get it to work). Haf X case with a bunch of fans - but those shouldn't matter too much.
So anyway, assuming I get this thing working (please work, please work, please...), can I add another [similar] rig to the circuit? And another? Another? How many? Will adding a UPS to each do anything useful in mitigating the power draw?
Thanks in advance!
On my rig, three 6950 draws about 700 watts running at full speed mining, and that's the entire system, not just the card, plus my rig is pretty inefficient with 95W CPU and a HDD. If you have 20A, you'd be fine even if you plug three rigs into the same circuit. |
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If you had that much power, why wouldn't you just mine your own blocks rather than pool?
absolutely not, variance would still be too high even for 45GH/s, he could possibly go on for weeks without finding a single block, if he bought the stuff on credit, he'd be f*cked if that happens. |
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98C is way too high (though won't melt your card for sure). HDD 120C on the otherhand, is totally crazy, you can cook an egg on it. Get a 240mm case fan and blow hard at it
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Simply using a resistor, has worked fine for me, I followed this guide: http://blog.zorinaq.com/?e=11bought a pack of 50 resistors for $1, and they all work fine as dummy plug what graphics card? this was not working with my 6870.. You did it wrong probably, I've done it with 6870, 6970, 5830 |
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I got 10 brand new sapphire hd 5830 Asking for $165 each, shipped anywhere in continental US. Will only ship to US address. If you buy more than one, for each additional 5830 you buy, you can deduct $5 from the total price as volume discount. I accept dwolla, paypal and BTC (at mtgox spot price) For BTC I can accept escrow thru clearcoin (charity type). Will ship USPS with tracking number  |
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WinAFC - http://affinitychanger.sourceforge.net/It's not my program, but I find it VERY useful. This will keep all of your miners on one cpu, and not keep your other cores running at 100%. Since I have a 6core workstation, having 4 miners open ties up 4 cores. Not anymore. Less CPU utilization also equals less power consumption My config file for demonstration: E:\Program Files (x86)\GUIMiner\guiminer\phoenix.exe := CPU1 E:\Program Files (x86)\GUIMiner\guiminer\poclbm.exe := CPU1 Enjoy! Tested and IT WORKS like a charm. Finally I can stop setting CPU affinity after each reboot. Man there's a proggy for everything. |
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great find if it works, I will try it when I get home
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yep, variance is the killer. Even some smaller pools that has something like 20 GH/s, could go for weeks without finding a single block.
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this graph is not accurate because of the difficulty increase today. "Other" has not increased by 6000GH/s overnight
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It seems from everything I have seen and what people are saying is you can run them on 1000w psu and still have a little bit of headroom. I say just go for it. It also would depend on the quality of the psu too so grab a nice corsair and it should have no problems.
I would not recommend the corsair 1000W for 4xgpu actually. Corsair quality is great, but they are too standard conforming. They do not provide enough power to the 12V rails to power 4xgpu(a flaw in the ATX standard spec, they will be fixing it soon). I tried 3x6970 on a corsair 1000W, the thing wouldn't even boot up (unless I removed 1 card and boot with 2). I replaced the corsair with an unknown brand XION 1000W, and it booted the 3x6970 like a charm, running stably ever since. |
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The older GPUs are not worth it to use for mining. They use a lot of electric power, but can't do a lot of calculation.
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Your setup seems quite the sensible thing to do. It's actually the method recommended by the wiki, and right now I can't think of any reason why this shouldn't be very secure. Especially if you never run any programs when logged in as the secure user.
However, the problem of keylogging (physically) still exists, as your password is the point of entry for any attacker. Other than that, you'll be completely fine.
How does a keylogger get installed on a live cd? |
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Wild piracy would cause a lot of people to lose jobs and their livelihoods, because not everyone is an enterprising entrepreneur.
It's the opposite. Piracy creates jobs. Oh yeah, that's why all the piracy rampant countries are software power houses? Face it, piracy destroyed the software industry in these countries, their talented programmers are now nothing but out-sourced coding monkeys for the powerful software companies in countries who has strict enforcement copyright laws. |
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I'm running 3 x 6970 on a 1000W XION PSU, with a 95W quad core CPU. I'd imagine a 1500W PSU would be more than enough for your PC, you can probably get away with anything above 1300W
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http://bitcoinwatch.com/as you can see, right now we have more than 8.5thash/s. Way more than 10% is from "Others", which are growing fast since this morning. As this is before the difficulty change, I doubt it is a calculation error. So does anyone know who or what has opened it's hashgates this morning?  bunch of smaller pools probably, like bitclockers.com, not represented on the graph. |
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It'll probably go up very soon. Massive difficulty increase in 48 hours. There are some correlation between difficulty and the value of the coins.
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Followed the same 30 second tutorial
worked fine w/ both 68 ohm .5W resistors and 75 ohm .25W resistors
buying an HDMI switch for this is nuts. you can build dummy plugs for <$1.50 no problem in literally 30 seconds
Simply using a resistor, has worked fine for me, I followed this guide: http://blog.zorinaq.com/?e=11bought a pack of 50 resistors for $1, and they all work fine as dummy plug |
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