riccardioo :
i was expecting at least 50fps for igpu. wondering where i messed things up
I have a GT 1030 2GB arriving tomorrow. It should be close to the iGPU in your APU. I can pop it in my 1300X and run Cinebench for comparison if you'd like.
The Vega chip in your APU is still pretty new, so kinda hard to judge a Cinebench score this early. But as Count Mike suggests, it should be close to if not slightly better than my GT 1030.
I doubt you could have messed anything up by simply assembling the parts into a complete build. Latest drivers for card and board installed? Win 10? Nothing running in the background when benching?