Hello everyone, I'm new to this forum,
I've read a hundred pages in this thread, and got some help on how to better use my wonderful C9, but I still got one major problem,
My gaming computer doesn't show 1440p resolution, I have a Sapphire R9 390 Nitro+, which is an old graphic card, with HDMI 1.4 (I think), limited to 1440p 60Hz or 4K 30Hz, using High Speed HDMI, with Ethernet and without (tried 3 cables) and tried also a Display port to HDMI (active) capable of 4K 60Hz but also not working on my TV, my computer is configured as a PC on HDMI 1.
Got no issue with 4K 30Hz but no other resolution above 1080p has 60Hz, and 1440p isn't listed at all, what ever I changed, disabled HDR, changed YCB444, 422 (don't know real names), disabled all options in AMD Settings, nothing worked, so for now I'm limited to 1080p 120Hz, and that is very fast and fluid,
Note that I've also a 4K monitor from Samsung and everything is working perfectly, 1440p 60Hz over HDMI, and 4K 60hz over Display port to Display port, and 4K 60Hz over Display port to HDMI cable,
I also managed to display 1440p 60Hz by adding this resolution manually to AMD Settings, but I've got an unplayable experience IG, image stutter as hell, so I gave up,
Now I'm interested to change my graphic card, it's time as my R9 390 is really useless with its HDMI 1.4, I'm interested on RX 5700 XT, and I wonder if someone tested it on 2019 Oled LG TVs, I don't want to buy an expensive card that will not profit of 1440p 60Hz or 120Hz, as my R9 390 is fully compatible with this resolution, but doesn't even show it on my TV, so I'm afraid that other new cards doesn't show 1440p also.
Note also that I've got the latest update 4.70.05, and HDMI ULTRA HD Deep color is enabled, nothing changed
Sorry for my mistakes, english is my third language,