Magic problems with the rx 580

Hello. Faced a strange problem.
Configuration:
Video - XFX RX 580 8 GB
Perc - Core i5-10400f
Ram - 16 gb ddr4
PSU - Cooler master mve 320v 700w
Monitor - SAMSUNG C27G54TQW 27 "

The video card outputs the image through hdmi, but stubbornly does not want to work through Displayport. How it all looks: only the displayport is plugged in, I start it, everything seems to start, but there is no image and the CPU indicator on the motherboard is on. The first thing I did was rewind the percentage. But it's not about him, because if you plug in hdmi, everything works. On vidyuhe 3 dp connectors, the result is the same from each. At the same time, the old gtx 660 works fine on dp with this monitor. I read about the 20pin problem, bought another cable, more expensive, better and with a 20m pin chopped off. All the same. I disassembled the cable itself (there is no way to ring) - nothing goes to the contact there. So it's not about the wire. I cut the monitor out of the socket, turned on the computer - the computer started up, the indicator is off! Plugged Monique into an outlet - and the image is! Magic is direct. But after the reboot, the story is again the same. I didn’t dabble with this, because it’s hardly just that the test is not passed at startup. So it's not clear where to dig. I already updated the BIOS of the card itself, I thought you never know. But that didn't change anything. I also updated the motherboard bios. Maybe you need some kind of special version of the BIOS? I would gladly update the vidyuhu, but taking into account the current deficit, even my 580 costs 4 times more than I took it. In general, the new one is not an option, but I don't really want to sit on the 660 with a 2k monitor ...