I'm struggling to downscale from a resolution higher than 2560x1440 on my Samsung 2770 LCD monitor (1080p). Using the AMD Downsampling tool. I have a Radeon 5850 card. If I select 3840x2160 I just get a blank screen. If I select 2880x1620 I get a blank screen. But 2560x1440 works just fine. Is there any way I can force a higher resolution to downscale? Any work arounds?