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Speedy84
Adept I

RX 6900XT unstable FPS while Vsync On

Hello,
 
With every game with Vsync on, the FPS drop to exactly 55 fps at 60hz and / or 115fps at 120hz after a short time, then they run for a few seconds at 55 or 115 fps before it goes up again to 60 or 120 fps, unplayable and it goes away after I switch back and forth between the monitors and / or switch back and forth in color depth and color format, every now and then it runs absolutely stable with 60 or 120fps, so it seems to be a software error. I also have a freesync Monitor but i love to play on the big TV with Vsync on, with my old RTX 2060 everythings work fine. Are there any solutions? It is a known error?  My Components:
 
Amd Ryzen 7 3700x
MSI B550 A Pro
32 GB Crucial Ballistix CL 16 3600mhz
Crucial MX500 240GB system ssd
2 TB Western Digital Blue 3D SSD
Corsair RM850X PSU
 
Monitor 1: LG GL850b
Monitor 2: Acer Predator xb241h
Monitor 3(TV): Sony kd65xh90
 
I reinstalled windows several times,until the first restart it worked like expected, all drivers are up to date, reinstalled the drivers, gpu and chipset, reinstalled the bios, tried it with only one monitor or with only the tv connected, nothing helped
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