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1  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?
2  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?
3  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.
4  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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