My laptop can not output 60hz@4k on my TV only 30Hz. It makes everything a bit choppy and laggy, so I changed my desktop to 1080p@60hz. Runs prefect at 1080p. The issue happens whenever I try to open a game up in Full Screen. My TV tells me it switched back to 4k, Even whenever I change the game resolution to 1080p it's still out putting at 4k@30hz. Im using a Intel HD520. It runs smooth on Boarderless window but some games like Bioshock do not have this. Is there anyway to fix this?