There are few in a wild, so maybe we will make a comparsion of them to use best one?

Results

1gh v1.2 - ubuntu 13.04 - 280x (1100/1500) ~1070 cpm
1gh v1.2 - windows 8 64 bit - 7970 3gb (1040/1500) ~1120 cpm

1gh v1.2 - ubuntu x64 - GTX 570 ~960+ cpm
1gh v1.2 - ubuntu x64 - GTX 560Ti ~660+ cpm

1gh v1.2 - AWS g2.2xlarge ~687cpm

cudapts v2014-01-12 - linux - GTX690 (stock clock settings) ~1780 cpm

PtsGPUz0.2ab.exe - windows 8 64 bit - GTX 570 ~830 cpm