This is driving me insane. I got a new pc, a gtx 1080 and an i7 8700k. 16b ram...the whole nine yards. When I bought it, all I had to use was an old 720p hdtv. It claimed it was 60 hz but it looked more like 30, I assumed this was some incompatibility with the old tv and my graphics card. Fast forward to today, I bought a new 1080p monitor (dell SE2717H) that claimed 75hz. The only connector is hdmi and vga, my graphics card only has an HDMI port. I connected it and I seem to be experiencing the same damn problem. It says 75 hz in the display panel but when I'm playing games it's anything but. War Thunder for example; I have it maxed out completely even the ssaa and I get average 115 frames, yet it feels almost like slow motion like it's a stable 30 fps. Nothing higher nothing lower, Like it's v synced to 30 but somehow it's not showing it. Especially when i'm flying and I look down at the terrain/turning quickly it almost feels like my fps drops but it stays exactly the same. Even my desktop feels slightly sluggish and YouTube 60 fps vids feel like 30, confirmed by comparing it to my phone which plays said 60 fps videos like they should be played. Does anyone know what the hell is going on.