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Author Topic: cgminer -k diablo parameter?  (Read 1761 times)
M3t (OP)
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April 11, 2013, 04:56:09 AM
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I see this used in a lot of setups. I'm using dual 7970s, should I add -k diablo? What does it do? ^_^;;

SECOND QUESTION:
I use --gpu-engine 1155. It is not dynamic. When I try to use a static memclock --gpu-memclock 350, it doesn't work, and sets it to 1375. Why does it do this? ;-;
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M3t (OP)
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April 11, 2013, 02:11:56 PM
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bump =(
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April 11, 2013, 08:43:15 PM
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I see this used in a lot of setups. I'm using dual 7970s, should I add -k diablo? What does it do? ^_^;;

SECOND QUESTION:
I use --gpu-engine 1155. It is not dynamic. When I try to use a static memclock --gpu-memclock 350, it doesn't work, and sets it to 1375. Why does it do this? ;-;

1) Did you read the readme for CGMiner? The "-k" option specifies a kernel. Diablo makes a kernel (also used in his own DiabloMiner), and is somewhat popular for 7xxx cards. I have found that letting CGMiner determine the best settings for 7xxx cards yields the best results, tho, so I would remove this comment.

2) CGMiner can only clock the memory 150MHz lower than your core engine clock. For you, at "--gpu-engine1155", this would be "--gpu-memclock 1005". If you set anything lower than this, it defaults to the cards stock memory speeds, which is apparently 1375 for you. I would recommend not using the "--gpu-memclock", and using the "--gpu-memdiff -150". Either one would work, esp if your clock is not adjustable, or completely static.

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April 12, 2013, 04:31:22 PM
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Ya I read what -k is, but no idea what Diablo is. Don't even know if kernel is software or hardware... firmware?Tongue
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April 12, 2013, 04:49:48 PM
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Ya I read what -k is, but no idea what Diablo is. Don't even know if kernel is software or hardware... firmware?Tongue
It is a chunk of software that's built as an OpenCL kernel that runs on your video cards. There are many different kernels: phatk, poclbm, diablo, diakgcn, for example. The diablo kernel was written by DiabloD3 for his DiabloMiner, but is also used by CGMiner. Confused yet? Good.  Wink Cheesy

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