OK, finally mess was sorted out. The RST compatibility sign in general spec do not mean all RST features are supported. In our case RAID is not supported -
http://www.intel.com/content/www/us/en/chipsets/8-series-chipset-pch-datasheet.html , and SmartResponse declared as unsupported too. You can install RST driver and check the "Accelerate" button availability, though.