I also have this same problem. I was playing one game and switched to another and suddenly i experienced terrible FPS drops down into the teens. At this point the VGA light came on on the motherboard. I reset the drivers, closed all programs, restarted the system, shutdown and rebooted the system and finally swapped to an older GPU i had laying around (HD 7870). The new gpu, after reinstalling the drivers, didnt have the FPS issues the RX 590 did and the VGA light went out on the motherboard, however, it has a hard time keeping up FPS wise and for whatever reason wouldnt allow me to have more than 2 monitors displaying at the same time (i have 3 24" dell monitors that run as one on eyefinity normally) So after about 3 days running that way i decided to try the 590 again and upon booting and logging into windows the VGA light didnt come on this time but in Warframe on the lowest res setting im averageing 20 fps +/- 8 and its nigh on unplayable. With just a live wallpaper on the desktop im showing 90-100% gpu utilization. Can anyone help? Did you find an answer for your issue?
AMD Ryzen 3600
Asus ROG Strix B550f-wifi
GSkill DDR4-3333c16q2 4x 16GB 64GB total
Western Digital 500GB NVME WDBRPG5000ANC-WRSN
Sapphire RX 590 Nitro anniversary edition gold
Sound Blaster Z
Gigabyte 750w 80+ gold P750GM
Lian Li Mesh Cool Case
