1065
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Bitcoin / Mining speculation / Re: If you're thinking buying mining hardware, read this first
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on: May 08, 2011, 04:33:49 PM
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Mining just needs to get more efficient. You don't need that much more attention. Some technological breakthrough similar to GPU mining when it came out would destroy the difficulty. New cards that are more efficient could come out. There are a lot of things that can make difficulty grow fast.
That would give the opposite effect of what the messages I responded to were predicting. I'm saying that difficulty will increase almost no matter what happens.
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1069
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Bitcoin / Mining speculation / Re: If you're thinking buying mining hardware, read this first
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on: May 07, 2011, 09:18:03 PM
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That's perfect! As long as the price goes up before the difficulty the miners are in the money.
Unfortunately there's no guarantee for that. In February/March the price fell almost 50% from the top while the difficulty tripled. Unless there is a regular flow of publicity in big media outlets the difficulty will rise much more than the price.
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1072
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Bitcoin / Pools / Re: Please test: New Experimental Pool "Eligius"
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on: May 06, 2011, 10:17:31 PM
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any clues why it pointed the wrong time and cannot retrieve my details ?, i have installed json-perl and libio-all-lwp-perl.
The parameter can't be read with my $acc = $1; it needs to be my $acc = shift; or my $acc = $ARGV[0];
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1073
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Bitcoin / Mining / Re: Turn miner on/off
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on: May 06, 2011, 09:06:50 PM
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so on a dedicated mining rig without other python called processes running "$pkill -9 python" would work fine from cron. I've always wondered what the difference is between using the python prefix command or just the $./process.py ... doesn't seem to make a difference to hashrate but who knows ...
The only difference is that if you do python <file> the shell will execute python which then loads and runs <file>. If you run ./<file> the shell will read <file>, see the starting #! characters (pronounced shebang) and then execute the program in the first line of it (often /usr/bin/python) with <file> as parameter.
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1074
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Bitcoin / Mining / Re: HD5850 @ 340Mhash/s
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on: May 06, 2011, 06:15:31 PM
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2. The other option is to find a BIOS someone has already modified (or use RADEON BIOS Editor) to set different voltages from the existing voltage table within your card. This can be dangerous, but is achievable as I flashed my XFX 5870 with a modified ASUS BIOS. I didn't get software voltage control, but the BIOS was reporting that it was using a higher voltage than before. If your XFX isn't a reference card it probably uses a voltage controller that isn't compatible with the bios you flashed. If that's the case it may look like the voltage is changed, but it's actually using preset values.
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1078
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Bitcoin / Mining / Re: Optimizing ATI performance, 6950 in particular
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on: May 05, 2011, 08:45:30 AM
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Since I've no windows machine around I would like to know if there is a way to unlock my Sapphire HD6950 under linux.
There may be easier ways to do it, but I would make a bootable USB-stick with Free-DOS or similar and a flash utility. Boot to it, dump your current firmware to "original.bin". Boot back to Linux, run the attached script on it, and boot with the stick again to flash it. <?php $file=@file_get_contents("original.bin"); if ($file===FALSE) { echo "Could not find input BIOS. Put it in this folder and name it original.bin\n"; exit(); }
$search=chr(0x4A).chr(0x8D).chr(0x54).chr(0x22).chr(0xFF).chr(0x0F).chr(0x49); $idx=strpos($file, $search); if ($idx!==FALSE) { $idx+=strlen($search)-1; $file[$idx]=chr(0x43); $file[33]=chr((ord($file[33])+6) & 0xFF);
file_put_contents("modded.bin", $file); echo "BIOS has been modded successfully and saved as modded.bin\n"; } else { echo "Could not find byte sequence in file.\n"; }
I've used this script with my Sapphire 6950 2GB and it works. Wouldn't do it if you don't have one of the original 2 GB cards, though.
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1079
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Bitcoin / Mining / Re: HD5850 @ 340Mhash/s
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on: May 04, 2011, 10:00:19 AM
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The 5850 can be unlocked to a 5870 with a simple bios upgrade. and I think they have a dual bios so you can't brick them either.
It's the 6950 that can be unlocked, and even then it's only partly true.
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