I've mostly only played Rainbow 6 Siege on my 7840U so far, but performance in that title is excellent. I'm able to get around 100 fps at 1080p medium settings and 100% render scale. I haven't had any problems with thermals either -- temps stay in the 70s under sustained load.
Note that I'm playing on an external 1080p 75 Hz monitor, so I haven't run into any sort of ghosting issues that some other people are talking about.
I've mostly only played Rainbow 6 Siege on my 7840U so far, but performance in that title is excellent. I'm able to get around 100 fps at 1080p medium settings and 100% render scale. I haven't had any problems with thermals either -- temps stay in the 70s under sustained load.
Note that I'm playing on an external 1080p 75 Hz monitor, so I haven't run into any sort of ghosting issues that some other people are talking about.