I don't know maybe the intel iris (I think 5100) is a substantial improvement, the only review I found on anandtech was for 2012 version which had the hd4000. O

I don't know maybe the intel iris (I think 5100) is a substantial improvement, the only review I found on anandtech was for 2012 version which had the hd4000. Or maybe the performance increase from haswell has helped. Either that or it is something I don't run into. I don't play games really but I haven't noticed any frame lag when scrolling.