Wonder if this pc build will turn out good

I agree with what gigngerbread said on getting a better psu. Other than that the monitor you have is a 1440p 144hz freesync panel and there are two potential problems with that. Firstly you might want to go with an AMD card like the r9 390 so you can take advantage of the freesync and secondly a single 970 (or r9 390) will have a hard time getting that much fps on newer games (eg. fallout, witcher 3...).You will probably get about 60 fps on high-medium setting.