Type sgminer --help>help.txt
--intensity|-I Intensity of GPU scanning (d or 8 -> 31,default: d to maintain desktop interactivity), overridden by --xintensity or --rawintensity.
--xintensity|-X Shader based intensity of GPU scanning (1 to 9999), overrides --intensity|-I, overridden by --rawintensity.
--rawintensity Raw intensity of GPU scanning (1 to 2147483647), overrides --intensity|-I and --xintensity|-X.

* Experimental `xintensity` setting (by _Kalroth_), see
  [commit message](https://github.com/veox/sgminer/commit/7aeae40af22e6108aab8b68a229eea25a639d650).
* Experimental `rawintensity` setting (by _Kalroth_), see
  [commit message](https://github.com/veox/sgminer/commit/d11df698d141988491494aa1f29c7d3595e9712b)

My bat for 7870 work fine  -k x11mod --gpu-powertune 10 --no-submit-stale --thread-concurrency 5120 -X 300
5120 here is 1280 cores x 4