GLDCoin: How to mine with CGMiner.

[Dayne]

CGMiner Setup
1. Download CGMiner. (Latest Stable Release [Windows] [Linux])
2. Extract the zip folder.
3. Create a shortcut to cgminer.exe, edit the properties of the shortcut and append the following the end of the target:

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--scrypt -o [poolurl]:[port] -u [username].[workername] -p [password]
Example:

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--scrypt -o stratum+tcp://gld.cryptocoinmine.com:6060 -u Dayne.1 -p x
Useful parameters to set are:

--shaders	~	Set to your gpus amount of shaders, google "your gpu name shaders".
--thread-concurrency	~	Better version of --shaders, should be a multiple of your gpus shader count you do not understand graphics card architectures you can just set --shaders and cgminer will attempt to set this as high as it can.
-w	~	Work size, will have little effect on hash rate, try 64-256 in multiple of 64, no higher than 256.
-I	~	Intensity, I find about 12 works best for me but if you want to use your computer at the same time you will want <10.

Example Setup for nVidia GeForce GT 630M:

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--scrypt -o stratum+tcp://gld.cryptocoinmine.com:6060 -u Dayne.1 -p x --thread-concurrency 6144 -g 1 -w 128 -I 12
Refer to the official CGMiner SCRYPT Readme for more information.

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I will update this guide with registering on a pool and make it more noob friendly in the near future.

If this guide helped you, please applaud me.

[Stouse49]

I am glad this topic was started.  I would like to see more information about using cgminer.

For instance this is my configuration using a 7870 (which has a hashrate of 345 Kh/s):

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cgminer --scrypt -o http://next.afraid.org:8117 -u addr -p x -I 12 -g 2 --thread-concurrency 8000 -w 256 --gpu-engine 1075 --gpu-memclock 1500 --lookup-gap 2 --queue 0 -s 1
There is about a 3% of shares rejected after 1/2 day of mining.  Is there a reason why so many shares are being rejected?

Shares are rejected when this message comes up:  "Stratum from pool 0 requested work restart"

[Dayne]

I am glad this topic was started.  I would like to see more information about using cgminer.

Definitely the best miner, imo.

For instance this is my configuration using a 7870 (which has a hashrate of 345 Kh/s):

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cgminer --scrypt -o http://next.afraid.org:8117 -u addr -p x -I 12 -g 2 --thread-concurrency 8000 -w 256 --gpu-engine 1075 --gpu-memclock 1500 --lookup-gap 2 --queue 0 -s 1
There is about a 3% of shares rejected after 1/2 day of mining.  Is there a reason why so many shares are being rejected?

You should have thread concurrency set to a multiple of 64 that is related to your shader count on your GPU. So yours should be 5120, or 6400, (if 8000 performs better, of course use that).

I don't know why so many shares are getting rejected. I can't help you there. :s

Shares are rejected when this message comes up:  "Stratum from pool 0 requested work restart"

Programmers start counting from 0. That is just saying you requested work from the "first" pool in your priority list.

[Stouse49]

Thanks for the help.  I found that 3% were rejected when mining on next.afraid.org, but when I changed to another pool, the rejects went down to zero.  For thread concurrency, I found that 8000 works better than 8192.  5120 gives HW errors.  I still need to experiment to find the best thread concurrency though.

[Stouse49]

<program source>:678:10: error: no matching function for call to 'rotate'

This error is possibly due to a nVidia graphics card, which does not support the "rotate" instruction that AMD cards have (from what I have heard).

Try using the Cuda Miner, which is made for nVidia graphics cards.  It also runs faster than cgminer for those cards.
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