When Litecoin difficulty becomes too high....


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Questions and Answers : GPU applications : When Litecoin difficulty becomes too high....

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staffnsnake
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Message 1462076 - Posted: 9 Jan 2014, 10:24:22 UTC

Hello all,

This is my first post. Notwithstanding the rather silly discussion (in retrospect) last year on bitcoin mining, I currently have six XFX Radeon R9 280x 3GB OC Black Edition GPUs (and another two on the way) running in Linux rigs that I set up in milk crates, for Litecoin mining. For the time being, mining is profitable.

But when the difficulty shoots up to highly unprofitable levels in the next 6-9 months (as some in China are rumoured to have vast farms of GPUs and still others rumoured to be developing FGPA for scrypt), I plan to put my computers to use looking for ETs.

Is there a link for a GNU/linux setup running multiple GPUs? I saw the link for installing to Linux, but I have had a bit of trouble finding a step by step guide for configuring BOINC for a four GPU setup.

My hardware, apart from the GPUs above, is an AMD Sempron 145, AsRock Extreme 4 motherboard, running Xubuntu 13.10 off a USB stick, Seasonic 1250W PSU, 8GB RAM.

I am still a relative newbie to GNU/Linux much less Unix. To date I have followed command line recipes and tweaked GPU settings in my miner programme (cgminer), although I have started reading some books on shell script and GNU/Linux for later use.

I would appreciate any help that could be provided. If the ridicule expressed in last year's bitcoin discussion (http://setiathome.berkeley.edu/forum_thread.php?id=68683#1256910) could be kept to a minimum, my guess is that once us "hillbilly" miners shut down, there will be a considerable amount of processing power coming your way.

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Message 1462327 - Posted: 9 Jan 2014, 21:51:07 UTC

I currently have six XFX Radeon R9 280x 3GB OC Black Edition GPUs (and another two on the way) running in Linux rigs...Is there a link for a GNU/linux setup running multiple GPUs? I saw the link for installing to Linux, but I have had a bit of trouble finding a step by step guide for configuring BOINC for a four GPU setup.


BOINC should use all 4 without any special configuration if they are the same model. If BOINC sees that one is more powerful, it will only use that one unless you use this option in a cc_config.xml file.
<use_all_gpus>
If set, use GPUs even if they're not equivalent to the most capable one. New in 6.6.25


Info on creating the cc_config.xml file is in this FAQ:

http://boincfaq.mundayweb.com/index.php?language=1&view=91&sessionID=8dcb1c990ef874ffa91920758b3d4b4f
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Questions and Answers : GPU applications : When Litecoin difficulty becomes too high....

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