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681  Bitcoin / Mining support / Re: How to build your own power supply? on: June 09, 2011, 06:24:20 PM
What the crap are you talking about? 100mA can stop your heart. Why would people go around being electrocuted by a car battery? I turn my car on with a key, not by shorting the leads with my body.

And yes, PSUs are transformers, at least functionally and they incorporate transformers as well as power switches. As I said they are complex creations and not to be made at home.

Yes, 100 mA can kill you. But, to make that current to flow thru your body, it needs to have a given potential (because, as you will know, our body is not a good conductor). Depending on a lot of factor (skin resistance, humidity, position of the electrodes,...) the voltage that can kill you starts from 50 VAC at the very least, and goes up to several hundreds. You can't even feel anything if the potential is only 12 VDC, disregarding the maximum current that it can generate.

Depends on which side of the switching circuit you decide to poke your fingers into. The 12V on the business end might be safe, but what you get from an unregulated discharge of the capacitors on the other end is a whole different story. Probably one with a sad ending.
682  Bitcoin / Mining / Re: Durability of x1 slots on: June 09, 2011, 07:53:21 AM
I was thinking of sawing a notch on the GPU... Roll Eyes

I do have an adapter without supplementary power. I might use that instead, but it would still work best in the x1 slot. The power question remains.
683  Bitcoin / Mining / Durability of x1 slots on: June 09, 2011, 07:23:06 AM
I see a lot of people mining on x1 slots, but how well does that work in the long run? I'm getting a 5850 to go with the 5870, and the combination of case design and slot layout requires me to put one of the cards in a x1 slot if I want to have some spacing between the cards.

Wouldn't worry too much normally, but beside the disruption caused by motherboard failure it's also a fairly fancy X58 motherboard, which should have a decent resale value if it's in working order.
684  Economy / Marketplace / Re: List of honest traders. on: June 09, 2011, 05:57:01 AM
+1 anodyne
Thanks Smiley

And +1 back to tecshare.
685  Economy / Digital goods / Re: Selling ANY Steam Games for BTC -PORTALS 2, Team Fortress 2, Call of Duy, & MORE on: June 09, 2011, 05:54:20 AM
Transaction suggested above completed. Excellent seller!

+1
686  Economy / Digital goods / Re: Selling ANY Steam Games for BTC -PORTALS 2, Team Fortress 2, Call of Duy, & MORE on: June 08, 2011, 10:06:50 AM
I have a $50 Visa gift card that I don't have much use for since registration to make it useful for online purchases requires a US address – which I didn't consider when I bought the card (from bitcoincashout.com), and using it with made up personal information feels somewhat risky.

So, would you be interested in taking the card and a small BTC commission in exchange for a game under $50?

(I'm suggesting this publicly rather than by PM, since I realize it could proably make me seem like someone being up to something. Smiley)
687  Other / CPU/GPU Bitcoin mining hardware / Re: PowerVR Mining on: June 08, 2011, 06:07:27 AM
And how do you plan on writing drivers to use this in mining? You need Cuda or OpenCL which the chip dosent have.

Cuda and OpenCL are just standards that allow you to access hardware through a standard set of libraries rather than writing custom code for each possible hardware/OS combination. Making a miner for other hardware is not impossible, but rather something that requires more work.
688  Other / Obsolete (buying) / Re: [WTB] Android Phone on: June 08, 2011, 05:35:36 AM
Power adapters shouldn't be much of a problem. I'm pretty certain more or less all Android devices can be charged over USB, and in case you need to charge it from the wall you should be able find a generic USB charger for about $10.
689  Bitcoin / Mining / Re: POLL: How much stales do you get? on: June 07, 2011, 02:47:27 AM
Been back to slush for a while, and since I last started GUIMiner it seems I have had 197 stales out of some 35900 shares...

Seems I'm doing quite well. Can't say I have any extraordinary settings, but maybe it helps being on 100Mbit line connected to a city fiber network that was built only a couple of years ago...
690  Bitcoin / Mining / Re: SOLD OUT EVERYWHERE!! on: June 07, 2011, 02:29:26 AM
Not so fast. Gigabyte 5870SO model kicks asses 24/7 with its 950MHz for 410-425Mhash/s depending on the miner app, but dual-fan cooling system is ... noisy. Jumps between 190 and 200W power consumption , but I'm lazy to check that with lowered memory clock (around 350MHz for stability purposes).

I have a Gigabyte 5870OC (same cooler, but with a small 20MHz OC). Been running it at 960MHz with the fan at 60%, and I don't find it very noisy. Just ordered a 5850 with the same cooler (my sense of geek aesthetics demands that I have matching hardware in my desktop system...  Tongue), so I guess I'll find out how two of them sound together in a couple of days.
691  Bitcoin / Mining / Re: Bitshine: GPU powered still for fuel/booze? (Just a wierd idea) on: June 07, 2011, 01:47:53 AM
Hmm.. I saw a website listing recipes for cooking food on the radiator while driving. I'm guessing they would work for mining as well, but I'd rather ask someone with experience in phase shift cooling about a method suitable for grease-insulating hardware first...  Cheesy
692  Bitcoin / Mining / Bitshine: GPU powered still for fuel/booze? (Just a wierd idea) on: June 06, 2011, 08:42:08 PM
So, I was thinking about what to do with waste heat, and somehow got the idea of a still that runs off the heat generated from bitcoin hashing.

No idea if it's anything that would work in practice, but in theory it should be possible to generate enough heat to get some amount of mash to 78°C... but I don't have the knowledge to figure out what density of GPUs, and what mechanism of heat exchange (if any) would make this work in a useful way.

So, I'm throwing this idea out to here in case anyone with more engineering skills wants to play with it. Smiley



But, in case someone decides to try it practice... save one of the GPUs for a miner of mine?  Wink
693  Economy / Marketplace / Re: Bitcoin Randomizer, just a stupid pyramid scheme on: June 06, 2011, 06:25:48 AM
I'm currently waiting for a payment of BTC100,000,000, which I will recieve in return for aid to a Doctor who is currently hiding in a barrel in the port of Lagos while awaiting the arrival of the ship – a transport towards which I payed BTC10,000 – which will bring him out of the country.

As my remaining assets are tied up in an effort to bring unclaimed British Lottery winnings and Western Union transfers to their rightful owners the aforementioned transaction has temporarily put an unfortunate strain on my financial situation, which is why I ask you to consider this mutually beneficial investment opportunity: http://fxnet.bitlex.org/?ref=1030

Sincerely,
A. Nodyne, Professor Emeritus.
694  Bitcoin / Project Development / Re: Transaction confirmation to slow on: June 05, 2011, 11:41:09 PM
Charges to my debit card usually appear on my statement as unverified until the next day. Probably something similar happens before the money ends up in the merchant's account as well. Still, we both trust Visa to get the money from point A to point B without losing it on the way.

Without connection problems it usually doesn't take many seconds for 0/Unconfirmed to appear at the receiving address, so the best solution to worries about confirmation times I can think of is to build the same (or better) trust for the bitcoin network as for the credit card companies.
695  Economy / Marketplace / Re: SkepsiDyne Integrated Node - A Bitcoin Mining Company on: June 05, 2011, 09:37:56 AM
So... paying out dividends might also increase shareholder confidence, which means fewer will be likely to put their shares back on the market for margin traders to play with – which is a game we've seen to be easy right now since they only have to stay one satoshi below the shares you offer.
696  Bitcoin / Mining / Re: how do we calculate our exact hash rate? on: June 05, 2011, 08:55:38 AM
Exact rate of what? Of our cards, or our combined effort over the network?
697  Bitcoin / Mining / Re: How blocks are divided to pools? on: June 05, 2011, 08:42:52 AM
And since every new block is built on the hash of the previous block, everyone starts over using that hash when a block has been generated. So, in effect, everyone is working on the same block.
698  Economy / Marketplace / Re: GLBSE Security on: June 04, 2011, 05:08:39 PM
The client download is, as far as I can tell, not much more than a makeshift frontend. Your shares/deposited BTC are on the exchange server, so any transaction you do from any client will be final.
699  Bitcoin / Mining / Re: Mining Gear. on: June 02, 2011, 02:43:38 AM
I'd be a bit careful with the non-reference coolers. Many of them work very well in single card configurations, but not so well in multi-gpu setups since the card below will block airflow to top-mounted fans. They also blow more heat into the case, which can cause additional cooling problems.
700  Bitcoin / Mining / Re: If you can explain this, I will send 1 BTC your way... on: June 01, 2011, 11:22:50 PM
The answer of resitance is the villian. On a standard setup, you can loose about 10k per card with an entension cable due to the increased time it takes to send a signal. It may also prevent a bootup.

Then why would it work with another cable, arguably exactly the same materials/length/makeup/manufacturing processes... etc etc..?

Probably a combination of a faulty cable and a slot that delivers less stable power than the other slots, which could be able to compensate for the problem.
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