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Bufius / vertminer-gpu

GPU miner for vertcoin
GNU General Public License v3.0
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need lower intensity #6

Open dmfree88 opened 10 years ago

dmfree88 commented 10 years ago

Now that intensity is handled by shaders, for 270x and 7870 and 7850 we need lower intensity! Check out my guide here about kalroths:

http://www.overclock.net/t/1461916/tutorial-ultimate-guide-to-tweaking-amd-cgminer-3-7-2-kalroth-edition-sgminer-instructions-included-aswell-get-the-most-hash-out-of-your-gpu

you will see that they have done the same thing using xintensity. With xintensity 4 and 2 gpu threads I have been able to maximize hashrates and minimize stales on my 7870 and 270x. Please lower the intensity limit to 3 (i have used 3 before and seen good results aswell).

marcelo-mason commented 10 years ago

This would be ideal going forward.

Bufius commented 10 years ago

This makes no sense for the shader based intensity calculation. With the current implementation, a intensity of 3 will compute to 5 threads on a R270x. But the minimum allowed threads depends on workgroup size (e.g. 256)

Set shaders to 1280, workgroup size to 256 in config and use intensity 11 -> 1280 threads will be used (=xIntensity 1). If you need even lower values, use e.g. workgroup size of 128