Is there a command line parameter for cgminer not to detect an ASIC?
eg: I'm after the opposite of a cgminer-nogpu.exe

I'm running a BFL Jalapeno with the drivers installed by a Zadig on cgminer-nogpu.exe and would like to use the GPU for mining LTC.

Thanks in advance!

Bump!

Since the drop in price of Bitcoins lately, has the premium dropped too?
A quick look on online auction sites suggest not... what about your experiences?

That was unlucky. 
Work out the premium for the price you actually paid for the coins you got, but for your own calculations, you can factor your losses in too.

The premiums added to the physical bitcoins by some "Casascius Resellers" on auction sites are horrific!
If you did manage to buy direct in the end, and included your losses in the calculation, how did it compare to such resellers today who set a fixed "Purchase Now" price?

Whilst looking at other commodities like Gold coins, the typical premium is 5-15% (depending on the mass of the coin)... not sure why it is so high for BTC.

What percentage premium over the (then) current market price did you pay for your loaded physical Casascius bitcoin?

Add delivery costs to the price you paid for the coin. The market price for the calculation should be MtGox at the time you bought your coin.

For example, Z BTC in one coin cost you £260.00, and the MtGox price is £85.22 then your premium percentage is:
=((£260.00-£85.22)/£85.22)*100
= 205.09%

Another way of putting it:
% Premium = ((Price Paid - Market Price)/Market Price)*100

So:

• Less than 0% - The seller sold at a loss. You got gained "free" bitcoins through that transaction.  
• 0% - You paid the current market value for your coin  
• 0-10%
• 10-20%
• 20-30%
• 30-40%
• 40-50%
• 50-60%
• 60-70%
• 70-80%
• 80-90%
• 90-100% - You paid twice the BTC value for the privilege of having it in physical form
• 100-150%
• More than 150%

EDIT:
I neglected to explain the rationale behind this poll. In the context of Gold Bullion, the premium is the "extra", (so to speak) somebody is willing to pay for having (taking delivery of) the metal in a physical form. For example, a Full Sovereign's premium as a percentage is more than that of a huge 1 kg bar. If you buy your gold in a form of jewellery, then it an even more expensive way of getting hold of the metal. The premium is supposed to account for the production of the Gold coin, bar or whatever. Usually, a smaller "lump" 1g, Half Sovereign attracts a higher premium than say a Full Sovereign, Krugerrand, 1 kg bar etc... Notionally, this is the "fee" for smelting, assay, minting etc.. of the physical metal, and costs more to create many smaller pieces than the equivalent weight in one lump.

I got a coin as it was shiny and looked like a currency off a sci-fi series. 

Does anyone know for sure (no trolling please) what BFL's game is?
There hasn't been an update for over a week now.
Do their chips work? Have they even tested the chips on the board(s)?
It is very odd that there has been no news at all since they tool delivery of the ASICs?

Surely by now, there would be some news about their testing?

Of course, delivery dates will be better.

I've got a conundrum:
What's the best way to generate bitcoin notes securely, assuming that I don't trust myself?
I've read the https://www.casascius.com/controls.aspx "Statement of Controls" as a starting point, but as a matter of pedantry, I don't want to see the private key.

To create the notes, I do the following, which I don't consider to be an issue for the purposes of this discussion:

• On an offline PC, generate bitcoin notes using the Bitcoin Address Utility.
• Print them to paper.
• Export list of bitcoin addresses (not private keys) to USB
• Secure Erase hard drive

However, the issue is the next few steps:

• I guillotine each note, face up so I can see where to cut - The private key is facing me during the slicing.
• Take the list of bitcoin addresses, and mail-merge onto Avery Sticky Labels with human readable and QT Code.
• For each note, I place between a piece of black folded card. (So that it can fit into a DL Sized Windowed Envelope)
• Find the appropriate label for each note, and adhere to window position on card above  -Private key can be glanced
• Put folded card, containing note into windowed envelope, so address/QT code are visible from the outside.
• Adhere a tamper-evident security hologram (with individual serial number) across envelope seal

As you can see, there are a number of stages above I can view the private key!

Is there a way to mitigate this problem?
For example, is there secure note generator which can create a single bitcoin note on an entire sheet of A4, A5 etc...), with all the private details are on one side, and the address on the other, and when folded, it will be visible through the envelope window?

What's the best way to generate a mass of bitcoin addresses (with matching mini private key and private key) and export them as a CSV file (for further processing)?
I've tried the Casascius Bitcoin Address Utility, but the "save address list" option only saves the addresses, and there is no option to save the private key!

I'm working on a way to generate inserts for a sealed windowed envelope with private key hidden, but address visible. The private key is going to be translated into NATO phonetic alphabet to aid typing in.

Thanks.

On the Casascius page at https://www.casascius.com/photos.aspx there are some really good high-quality photographs of piles shiny physical bitcoins!
Does anyone have any similar photos of the newer "windowed" ones? (The photo appears to be series 1 with the address printed on the outside, rather than displayed through the "window" in the hologram)

Thanks.

Thanks everyone for your help!
In the end, I installed v0.8 and then re-downloaded the Blockchain from scratch using the -dbcache=2000 parameter. This was much quicker than on the previous version of bitcoin-qt. Unfortunately, it and Armory takes up a lot of RAM though!

Hi Akka,
Thanks for your help!
I'm using v0.7.2-beta... when did v0.8 come out?

Can I still transpant the files over to 0.8?

Kind Regards.

This is a newbie question...

I've installed bitcoin-qt and Armoury on on a PC. After ages, (more than 8 hours) the blockchain is still downloading. (Last received block generated 175 days ago).
Instead of going through the same rigmarole again on another PC, can I install bitcoin-qt, and move the files from C:\Users\USERNAME\AppData\Roaming\Bitcoin to the new installation?

Which files do I need?
Are blk0001.dat, blk0002.dat and blkindex.dat enough? (I don't need to move my wallet.dat)

Can they just be "dropped into place", or is there a command line option I need to use to make it recognised?

Many Thanks!

DannyHamilton, you're right about choosing multiple answers. I thought I'd clicked the right checkbox, but it won't let me go back and edit it now!
Regarding blockchain.info, MtGox etc.. I kept this poll specific to client software which runs on the computer itself, so I guess they would fall under the category of "other"

As a newbie, I'd like to know what the most popular bitcoin client other newbies and experienced users alike are using.
Perhaps I've made a bad choice? - Mine (who will not be mentioned in case it prejudices the poll) is a bit clunky.

Thanks for the info... but does it work?
On their pricing on the website, it says:

A bitcoin address and private key is way longer than 14 bytes! 

I can't post yet in the main forums, so I am asking here.
Is there a free and open source QR Code Generator for Word?

I have generated an Excel Spreadsheet of addresses and private keys, which I'd like to mail merge onto "bitcoin notes" of my own design.
I'm looking for a free QR Code generator which would let me do this in Word.

Any ideas? Googling for them results in FREE Trials, which is a waste of time!

Thanks in advance!

PS: These are vanity keys beginning 1test, and I can't get them into the BTC Address Utility. Also, I want my own layout!

Tried to mined them with a cheap graphics card. Got as far as BTC0.02 then paid for a Casascius coin from ebay!

As a newbie, I've decided to go for the BFL Jalapeno. It is much cheaper than any of the the Avalon products (in terms of outlay and dipping the toes into the water, so to speak). Also, the UK customs charges will be an issue with buying something expensive from outside the EU.
I'm not expecting to ever break even on the hardware costs as the big boys will have thousands of dollars to spend on the higher end rigs, but I do hope that as I ordered the Jalapeno yesterday, it will arrive before it becomes completely obsolete! If the order number is any indication of the number in the queue, at 19XXX, it may prove to be a fool's errand! Hope not though.

What we need (in the UK) is somebody trustworthy to build on Casascius' work, and start "minting" their own physical bitcoins in the UK under a different "brand". Mike has already laid the path with the BTC Address Utility he's written. This way we can solve the problem of import duties and delivery. However, it will need some work building the reputation and trustworthiness Casascius already has. I'm surprised nobody else has gone through the effort to make physical bitcoins.