electricity is rather expensive for us - 0.18$/kWh in primary location for GPUs and 0.16$/kWh
Ya, that's going to be a problem. Probably even a show-stopper level problem. |
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Is it possible for me to even make profit at that rate of electricity?
Since the calculator uses USD first convert your electric cost to USD. Converting 0.1619 EUR to USD gives $0.21 kWh rate. Ouch! Typical power consumption for that card (5770): about 100 Watts or more. - http://en.bitcoin.it/wiki/Mining_hardware_comparisonSo if you are running that 24x7, just the card itself (not including power consumption from the rest of the PC) is consuming: 100 Watts X 24 hours = 2.4 kWh / day Cost per day: 2.4 kWh X $0.21 USD = $0.504 USD per day. If your computer is already running 24x7 then mining is costing you an additional $15 USD per month ($0.504 X 30 days) for electricity. Bitcoins generated, at current difficulty: 0.13 BTC or $0.67 per day. At the current difficulty, mining is bringing in about $20 USD in revenue. - http://www.alloscomp.com/bitcoin/calculator.phpSo mining is giving you a profit of $5 USD per month. If you include the cost of electricity consumed by the computer as well, that rig is losing money every day (at the current difficulty and BTC/USD exchange rate levels) due to your electric rates being so high. What hardware should i invest in if its profitable? The mining hardware comparison will show other GPUs that are more efficient, but that isn't your problem. The cost of electricity for you is too high for you to mine using GPUs and earn anything that would resemble profit (especially once you include the cost of capital). FGPAs will help as they are about 10X more efficient than GPUs, but then again you are competing against those who are paying electricity rates half or less than you are paying. |
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Is there a way to run the bitcoin client entirely from a usb? I've been moving the bitcoin folder in roaming each time I want to run the client. There must be a easier way.
-datadir= - http://en.bitcoin.it/wiki/Running_BitcoinNo matter where you launch the client from it will use the blockchain and wallet data from the directory given by -datadir. If you are on Windows, here's a howto so that the bitcoin client and data are on the usb drive: - http://bitcointalk.org/index.php?topic=22582.0 |
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It is likely related to this outage: "[DOWN] http://w003.tx.us down due to hardware failure. Datacenter busy replacing faulty pieces." - https://twitter.com/#!/KalyHost/status/179340018647711745 |
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cool  let's see how that goes... operation Paperclip 2.0 Someone else was trying to sell bitcoins in this manner. They are no longer active, so perhaps that didn't end very well (chargebacks can occur up to 180 days after the sale, so sales of these might seem to be going well with no chargebacks and then all of a sudden boom!) - http://bitcointalk.org/index.php?topic=14632.msg398096#msg398096If enough people ask eBay about BitCoin for escrow (to avoid scamming), would they consider it? Or is that just stupid of me to think?
Are you suggesting that eBay allow the seller to put in the restriction that payment using bitcoins to an escrow service is required? I can't imagine eBay allowing this for listings on their own site. I suppose what you could do is compose a listing that has terms "cash only, local pickup only" but then in the description mention that the item can be shipped if paid for using bitcoins (through an escrow service if the buyer wishes). |
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What could he/she do to the network? Can he move people's funds without their permisson? How long do a hacker need to control the network to make his changes irreversible?
What an attacker can do once the network is taken over is quite limited. Under no circumstances could an attacker take anybody else's money. An attacker's capabilities are limited to taking back their own money that they very recently spent, and preventing other people's transactions from receiving confirmations. Such an attack would be very costly in resources, and for such meager benefits there is little rational economic incentive to do such a thing.
Furthermore, this attack scenario would only be feasible for as long as it was actively underway. As soon as the attack stopped, the network would resume normal operation. - http://en.bitcoin.it/wiki/Myths#Anyone_with_enough_computing_power_can_take_over_the_networkAs long as the attacker has 50%+1 of the hashing strength then it would be as if the attacker is the only miner mining. Immediately, the attacker can reject all or some transactions from being included in new blocks. With this power, the attacker could overtake the chain and rewrite previous blocks so as to reject a transaction of coins the attacker previously spent and then to double spend those coins in a new transaction to an address under the attacker's control. |
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The moves in the chart over the past days don't appear they can easily be explained as variance. Previously Bitcoin hadn't seen the situation where the exchange rate was stable but the but mining difficulty swung one way or another to this degree -- and not like this -- huge dip followed immediately by a huge spike. Something's coming down the pike. FPGAs are attractive due to lower power required -- the megahash/Joule (Mhash/J) is an order of magnitude greater than that with ATI GPUs: - https://en.bitcoin.it/wiki/Mining_hardware_comparison#FPGA_DevicesMaybe production of FPGAs is going to start having a significant impact on the difficulty? That would push the date to occcur earlier than December 9th.  - http://bitcoin.sipa.be/growth-10k.png |
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I tried that already. I saw someone had a similar problem on github but the issue was unresolved. As far as sending my wallet.dat file, I only have a few bitcoins so I'm willing to take the risk.
If you wanted to try, you could try pywallet to dump the keys. The latest version will work against encrypted wallets: - https://github.com/joric/pywallet $ python pywallet.py --dumpwallet -password=xxxxxxxxxxx |
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Incidentally, Aaron Greenspan (of Facecash) is seeking support for New Hampshire HB 1700: Support H.B. 1700! Help New Hampshire stand up to the banking lobby. - http://www.facecash.com/legal/nh.html |
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or is there someone I can send my wallet.dat to take a look at it?
Of course, in doing so you are trusting the person that you send it to with your bitcoins in the wallet so keep that in mind. It is possible the problem is not with the wallet.dat but with some other file. Firstly, make sure you have a back up of your wallet.dat To determine if the problem is with the wallet or somewhere else, do you have another computer that you can put bitcoin 0.52 on and copy your wallet there? Or else you could on your current system clear out the data, and reinstall the client, restore the wallet.dat file and see if the problem persists. A recent blockchain copy is available here: http://eu1.bitcoincharts.com/blockchain/ (though know that there is a risk to using a blockchain obtained from third-party source) |
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I'm running Bitcoin version 0.52 and every time I enter my Wallet passphrase, the wallet crashes. This happens whether I try to send btc or change the passphrase. This is usually not accompanied with an error message. Is there any way I can fix this, or is there someone I can send my wallet.dat to take a look at it?
Windows, Mac or Linux? (and version. e.g., Windows 7 Home) (This matters as the troubleshooting steps might be different) |
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Show me a way to pay my tax bill with bitcoins, and I'll do it, until then, they expect their payment in dollatrs.
Funny you should say that:  Introducing Limocoin Payment System from Bit-PayORLANDO - Bit-Pay introduces LIMOCOIN, a bitcoin payment system designed for limousine and taxi drivers and businesses. With Limocoin, businesses can quickly and easily accept payments from any bitcoin digital wallet. Businesses can accept bitcoin payments instantly from foreign travelers, from any country, with no risk of fraud. Customers can load bitcoins onto their mobile phone, and pay for taxi and limo services in any country, worldwide, using bitcoins. Limocoin merchants can use the Mobile Checkout to request a specific amount on their Apple or Android phones. Limocoin merchants can also use a Deposit Card, and receive bitcoins with no computing device required for the driver. Once the payment is received, merchants can elect to send the bitcoins to their wallet of choice, or have them exchanged and receive a direct deposit into their US bank account. To learn more, visit http://limocoin.com. - http://bit-pay.com/press/2012-02-09-01 |
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So, instead of a transfer of $50(minus fees), I lose that $50, and am being held responsible for a $50 fee the bank levied because the transfer failed! I'll get back ~$25 of the failed transfer, and lose ~$75 in fees
Wouldn't it be great if there were a method of transmitting money internationally that didn't need identifiers like SWIFT, IBAN, ABA, etc, And wouldn't it be great if the fees for executing the transfer were less rapacious? Additionally, wouldn't it be great if the information about the transaction was available so that the person sending the money could personally confirm that the funds went through or not, rather than having to get information secondhand through some financial institution. Or better yet, skip the financial institution -- put it right on the Internet so people could send the funds from their own computer or mobile? Ha, ya! That's a really cool idea. Someone should invent it.  |
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VirtEx doesn't have much coverage here from the OP so I'll post an email I got which provides some updates: From: *@cavirtex.com Subject: VirtEx Canada Update March 5 2012 Date: Tue, 6 Mar 2012 VirtEx Update for March 5, 2012 - www.cavirtex.com1. Now active with hyperwallet - You can now deposit and withdraw funds with Hyperwallet at www.hyperwallet.com. One of the unique features they provide are INSTANT transfers from a credit union account 24/7! All hyperwallet deposits and withdrawals cost only $0.25 billed by Hyperwallet, no additional fee will be charged by us until Apr 1,2011! 2. New Fraud Prevention Measures - More stringent verification checks are being performed on first time transactions and new accounts. We are working with the banks and law enforcement to prevent fraudulent transactions. We take payment fraud very seriously and are constantly improving our verification system. For those users who are already verified, our administrative team may be contacting you by telephone to confirm certain details of your account. We appreciate your cooperation to help make VirtEx a secure and trusted exchange. 3. Volume Increase - on track to break 10,000 BTC per week! We just had some large merchant and mining organizations join us, you will now see better spreads, increased volume and larger order values. If you would like your limits increased, please contact us. 4. Administration Fees for breaching our Terms of Service - Attempting to circumvent our terms of service or deposit limits creates extra administration work for VirtEx. Depending on the case, a fee of up to $50 will be charged. You are only allowed one account with Virtex and multiple accounts must be consolidated. Any payment made to your account must originate from your identity. Always use the notification system BEFORE making any deposits. 5. Announcements - Our announcement page contains very important information for our users, do not skip the announcements and ensure you read them carefully. Do not rely on email notifications for changes to the system, always refer to our announcement page (shown every time you log in to your account). 6. Exchange Improvements - Virtex is developing new features and functionality for the exchange. Details will be posted on the announcement page. We appreciate your suggestions on features you would like to see and invite you to email your suggestions to admin@cavirtex.com. > hyperwallet deposits and withdrawals cost only $0.25 billed by Hyperwallet Nice! > Volume Increase - on track to break 10,000 BTC per week! Very nice! |
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How about getting cash the other way FROM MTgox to  ? Dwolla is way too slow 7+ business days,gggrrrrr. Actually, it is pretty fast -- Mt. Gox to Dwolla happens within minutes. Then you can withdraw to your bank. That's probably the problem you are describing. If you haven't linked a bank account to Dwolla yet, that process where they send a couple of test deposits to it can take up to five business day. But then once you have that linked, your actual withdrawal from Dwolla to your bank takes just two to three days. Still not lightning fast, but it is not 7+ days. |
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