@hughlle, Thanks for the reply.
well tried to run cod infinite warfare,i know its highly demanded game ,but the 4 gb ram was problem.
and some other games from windows store like forza motorsport 6.
anyway i like the gaming capability of SB and the cooling performance instead throttling issues of SP.
But i need the machine all the day with me for engineering job,so the kg of the SB its a bit negative.
trying to figure out which machine i should buy right now,i pretty happy with surface's all these years even now i use my old sp2.
i do casual gaming,just one hour per day if i have time,but i want to play some new games even at low settings/res , and keep at least 30fps.