GPU up-scaling can't be stopped in windows 10

Discussion created by jdorje on Aug 10, 2015
Latest reply on Sep 15, 2015 by jdorje

I have a monitor that will run at 3840x2160@30, or 1920x1080@120.  In windows 8.1 it was a relatively easy matter to use 1080 resolution with GPU up-scaling off.  The 1080 feed would be sent to the monitor.  But on upgrading to 10 this is completely impossible as far as I can tell.  For starters, if I simply go into the appropriate tab in CCC and disable "gpu up-scaling", then go to the resolution tab and change it to hdtv 1080p@60, the signal that is sent to the TV will be 3840x2160@30, seemingly upscaled from 1080 to 2160 and now with only 30 hz.  Extremely annoying.


Adding a custom resolution for 1920x1080@120, via CRU, which worked fine in windows 8.1, now completely breaks the display and requires a reset.


When I enter a game and set it to 1080, this works - sort of.  Sometimes it uses what the monitor calls "1080p", aka 1920x1080@60, which looks okay - but of course no way to get it to 120 hz like that.  Other games will use "1080i", which looks much worse and I assume is interlaced and possibly being scaled from some other resolution.


I've tried uninstalling the display driver and reinstalling (both through windows update and via direct download), on several occasions.  I have not yet tried a fresh windows install, but it may come to that.


Any advice would be appreciated.


Playing with my Seiki se39uy04. Got it to do 1440p at 60hz. Playing with other custom stuff.