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1  Economy / Trading Discussion / Re: Here's the problem - BitCoin users are too cheap and just want to hide it on: June 19, 2011, 04:54:58 PM
I put up an ad for bullion and got zero takers.  Have to agree.
So bitcoiners are hoarders because they wouldn't buy your metals to hoard?
2  Other / Obsolete (selling) / Re: Selling 6 week old, great condition 5830 on: June 16, 2011, 12:03:11 AM
After running some numbers, I decided I'd let it go for a steal at 6.5 btc shipped.  That's ~$130.

Prices in general depreciate, but right now we're in a demand crunch situation for cost-effective mining hardware.  This generates 270 mhash/s with minimal effort towards optimization.  A 6990, which under the best circumstances gives 3x as much mhash according to the absolute best case in the wiki.  However, it costs 5.9x as much.  Assuming you can even find any in stock...which isn't exactly likely.


At the price I'm offering, it's about 2.8x as cost effective as a 6990, excluding overhead.  Even assuming massive overhead costs, we're looking at, say, 1.5x the cost effectiveness.

If nobody's willing to take that offer, meh, I'll dust off my ebay account and get $150 for it.
3  Other / Obsolete (buying) / Re: Need PHP/Web Design for BitCoin related project, will pay with BTC on: June 15, 2011, 02:14:57 PM
If you're talking about a small budget (~$400) and are asking for someone with the kind of experience you're indicating...that's generally considered a red flag for a problem client.

If you're also demanding an NDA for a 'small project', the paranoia indicated is another 'red flag' -- generally people who try to hard to cover their asses always feel like they're getting ripped off.

Top that off with, 'If you post here, I'll know you're illiterate', and seriously...I hope you don't think you're actually going to get a reputable, capable developer.

I'm not trying to troll or flame here, but I think you need to reconsider your approach to getting this project done.
4  Other / Obsolete (selling) / [sold]Selling 6 week old, great condition 5830 on: June 15, 2011, 05:40:54 AM
I got one of those Sapphire 5830s off of Newegg while they were in stock.  Pretty much everything you need to know about it here:
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102878

As you can see, it was $110.  I'm asking for 8 bitcoins for total cost shipped.  At the current exchange rate, that's definitely a premium, but these things just aren't around cheap anymore.  There's one on ebay for around 150, but that doesn't include shipping, you'd have to wait 3 days for the auction to finish, go through the hassle of exchange, etc.

Now, I've upgraded to a more expensive card and, due to power limitations in my own and my wife's desktops (I'm not using dedicated rigs), I can't run this 5830 anymore.  It's the least power-efficient of the cards I have, so I'm letting it go.

I've been running it close to non stop for the past 6 weeks at 950 mhz.  That's with stock memory clocks and stock voltage.  I found that for mining purposes it could work at 985mhz (didn't test any higher), but it was somewhat unstable if I tried gaming on it at those clocks.  It generally sat from 75-77c depending on the ambient temperature.  I'm sure someone with the right setup, BIOS/voltage mods, etc, could take it up even higher.

It would ship in its original packaging with everything from the box except for 1 6 pin power connector I'm currently using.  Other than that, it's like getting one new, except I can guarantee it won't be DOA!

I figure I'll put it up on ebay later if this doesn't pan out, but I thought I'd give y'all first crack at it.

Any takers?
5  Bitcoin / Mining support / Re: Changing graphics cards in Ubuntu on: June 14, 2011, 11:55:31 PM
Upon running glxinfo, I get a massive amount of output that's pretty meaningless to me.

Upon running lsmod | grep fglrx, I get:
fglrx                2434640  173

Upon running sudo aticonfig --initial, I get:
Uninitialised file found, configuring.
Fail to link to fglrx-libglx.so, please check whether driver is installed correctly
Using /etc/X11/xorg.conf
Saving back-up to /etc/X11/xorg.conf.original-0


This last one seems interesting...the driver works fine for running the display.  I basically just turned off the proprietary driver when after I put in my 6950, and then turned it back on; I did this the lazy way via the Additional Drivers menu.

If these drivers aren't working for it, where exactly should I be getting them from?  What source do you use for your drivers?
6  Bitcoin / Mining support / Changing graphics cards in Ubuntu on: June 14, 2011, 01:38:40 AM
I recently upgraded my 5770 to a 6950 in Ubuntu, and it isn't being recognized as an OpenCL device.  Does anyone have any experience with similar situations or know what causes a new device to be 'seen' by OpenCL?
7  Other / Beginners & Help / Re: 8 day delay on MtGox -> Dwolla transfer on: June 13, 2011, 12:48:04 PM
So, I've been having quite a heck of a time getting MtGox to transfer some cash out to Dwolla.  I'm sitting on a fairly large pile of bitcoins, everything my two mining rigs have come up with in the last week, waiting for this to be resolved.

Five days ago, I received a message saying he had done something to speed up the transfer, and it should be completed some time that day.  Obviously, given that I'm posting this...that is not the case.

I sent him another e-mail about this, quoting his first response, two days ago.  I've received no reply.

Has anyone else had absurdly bad experiences like this with MtGox?  Over a week to transfer money to Dwolla?  This is, by far, worse than the old-school banking system.  It takes me 3 business days at most to get money moved around in there.

And to Adam/Tux, can you or will you do anything to fix this?  You have my e-mail, and you've had a long time and notification of the problem to correct this, or at least issue a reply that isn't a false claim of resolution.

YES!  I tried to withdraw funds on 6/5 and still nothing.  I received a response from them saying that Dwolla had changed something and that they were going to retry my transfer that day but that was 4 days ago.

Very frustrating, i have moved some BTC over to Tradehill and I am hoping the volume there picks up (which it looks like it is).

Holy cow!  Trade Hill!  Sweet!

Why is this not on bitcoinwatch?!

Sir, if you want me to put you in as a referrer, PM me some time today.
8  Other / Beginners & Help / Re: Too late to start mining? on: June 13, 2011, 12:25:53 PM
Since I started mining a few months ago, the difficulty has increased about tenfold, while the market price of a bitcoin has increased about thirtyfold. Doesn't sound too late to me.

That said, if I'd taken that $500 I spent on mining equipment and just bought bitcoins instead, I'd have turned something like a $14,000 profit (on paper), for a lot less effort spent. I haven't mined anywhere near the number of bitcoins I could have bought.

That said, any fool can predict the past. Mining is profitable right now, whereas buying bitcoins requires a lot more 'faith'. It's really up to you.

I had to use my first 2000 BTC to fund my video card purchases back in January  Cheesy.

Hahaha...WOW.

It's interesting, the trade off between what amounts to currency speculation in the form of holding your bitcoins, cashing out to reduce USD risk, and purchasing services with bitcoins.

Personally, right now, I'm a currency speculator.  Haven't sold any bitcoins for some time.  I figure I'll hold on to them til they have a value I think is worthwhile, and then I'll spend them in what will then be a more mature market place.
9  Other / Beginners & Help / Re: Whitelist Requests (Want out of here?) on: June 13, 2011, 12:20:46 PM
White listing requested here!

I remember the good ol' days before we needed white listing.  I mean, I've been around THAT long.  That alone should qualify me!

I mean, it's been, what....3 days?
10  Other / Beginners & Help / Re: 0.02 giveaway... 2 free bitcents for first ten newbies on: June 13, 2011, 12:17:47 PM
1Eo2NNXxnAdsXrxsKwboeGNS9qHsW4n5JN
Boom!
11  Other / Beginners & Help / Re: Eelectrity: How much do you need to pay per KW/H on: June 13, 2011, 12:12:55 PM
You guys have expensive electricity!

My base rate is .065, but because I'm a heavy user, I pay .095.

Neener neener, my 5830s cost less to run than your 5770s!
12  Other / Beginners & Help / 8 day delay on MtGox -> Dwolla transfer on: June 13, 2011, 12:09:21 PM
So, I've been having quite a heck of a time getting MtGox to transfer some cash out to Dwolla.  I'm sitting on a fairly large pile of bitcoins, everything my two mining rigs have come up with in the last week, waiting for this to be resolved.

Five days ago, I received a message saying he had done something to speed up the transfer, and it should be completed some time that day.  Obviously, given that I'm posting this...that is not the case.

I sent him another e-mail about this, quoting his first response, two days ago.  I've received no reply.

Has anyone else had absurdly bad experiences like this with MtGox?  Over a week to transfer money to Dwolla?  This is, by far, worse than the old-school banking system.  It takes me 3 business days at most to get money moved around in there.

And to Adam/Tux, can you or will you do anything to fix this?  You have my e-mail, and you've had a long time and notification of the problem to correct this, or at least issue a reply that isn't a false claim of resolution.
13  Economy / Marketplace / Re: More than 1 day, non-payment MTgox LR on: June 07, 2011, 03:24:34 PM
I'm having a similar issue on a Dwolla withdrawl.  I'm really curious about how wide-spread these problems are.  Have any of the rest of you heard from Mt Gox or gotten any resolution?
14  Bitcoin / Bitcoin Discussion / Re: Difficulty increase - 60% on: May 19, 2011, 03:16:38 PM
I'm not sure what people were expecting.

Even after this difficulty increase, annualized ROI of slapping a new video card in an old system and sticking it on deepnet is somewhere between 500 and 650%.  Bitcoin has a very efficient and open exchange system.  I'd be surprised if mining difficulty didn't increase at a rate of 50+% every two weeks until we're down to a more reasonable ROI, not adjusted for risk, of 10-30%.  That's another 4-7 increases of 50+%, assuming bitcoin prices don't dramatically increase to compensate...in which case, it will last even longer.

How about after the next one, and the one after that, etc?  Are you including the shortness of the retarget cycle into your projections?

I just picked up a bunch of capacity at the alarmingly good rate of 1.7 Mhash/sec per dollar.  I don't expect to ever get that money back.  I actually think that the magic day of no return was a couple of weeks ago.

Then again, if the exchange rate improves, which I find highly unlikely, new gear purchased today could still pay off.  Maybe.


Here's my rationale, and note that I specifically was talking about putting a new video card in an old system:
1.  The difficulty increase of 60%, by itself, does not mean hardware won't be profitable.
2.  If we extrapolate this difficulty increase out indefinitely, however, it does.
3.  Because of this, people are going to let off putting in new hardware, which will moderate the difficulty increases down to somewhere in the 20-40% range within a cycle or two.
4.  At that point, we will have reached a 'reasonable' return for a risky venture in the area of 10-30% annually.

I misspoke saying that they would increase at 50%+ every two weeks for some time.  I think it's more likely we'll see one, maybe two more increases at that rate, then slower, but significant increases for the foreseeable future thereafter.  That's what it will take to get bitcoin mining profitability in line with ventures of comparable risk.  However, this most recent difficulty increase should not have surprised anyone, given how much more coins cost now than they used to.
15  Bitcoin / Bitcoin Discussion / Re: Difficulty increase - 60% on: May 19, 2011, 04:03:48 AM
I'm not sure what people were expecting.

Even after this difficulty increase, annualized ROI of slapping a new video card in an old system and sticking it on deepnet is somewhere between 500 and 650%.  Bitcoin has a very efficient and open exchange system.  I'd be surprised if mining difficulty didn't increase at a rate of 50+% every two weeks until we're down to a more reasonable ROI, not adjusted for risk, of 10-30%.  That's another 4-7 increases of 50+%, assuming bitcoin prices don't dramatically increase to compensate...in which case, it will last even longer.
16  Bitcoin / Development & Technical Discussion / Bitcoin wallets and error correcting code on: May 14, 2011, 11:32:08 PM
I've been mulling over the various wallet storage solutions, and most of them, I'm just not satisfied with.  One flipped bit can invalidate your entire wallet unless you keep it backed up in multiple locations.  Not that keeping it backed up in multiple locations isn't something that should be done anyway...but anything that limits the requirement to back up from a remote server is great.

I was wondering if anyone had any experience applying bytewise ECC to bitcoin.  The algorithm for tolerating 1 bit of error per byte is fairly straightforward, and would dramatically increase the robustness of a bitcoin wallet.  I've read a bit about it, but it's been a couple of years since I did any related coding, and even that was just simple classroom stuff.  I can't seem to find any programs which implement ECC archiving.  Has anyone else had thoughts along these lines, or any knowledge in the area?
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