troubleshooting a gpu

[Amir F. Rad]

hello i am trying to get more familiar with gpu structures and how they work, i saw someone in youtube fixing gpus and used a software to check the memories on the gpu, does anyone know what softwares you can check a gpu memories in dos without the need of windows please? also to learn more and do try and error i bought some broken rx580 and rx590 to do my examination on them, there is a rx590 which is ex mining gpu it is producing the picture withoiut any problem but i cant instal drivers and in device manager it shows error 43, i tried to change the bios and it just saying mismatch id, so i used an older version of amdvbflash version 2.84 which i always use when i want to change vbios for diffrent cards but on this rx590 it is saying no sopppourted gpu is detected and wont open so i can change the vbios and on newer versions it keeps saying mismatch id, i tried to do it otherways but didnt work, the only way i could use for solving mismatch id error was using 2.84 verion to change vbios and that version doesnt work on this gpu, do you have any sugestions please to try on this gpu to learn more

ps: this specific gpu wasnt working at all, first i tried on an intel13th gen pc to see if it is working or not and it kept turning off and on again every time mobo got to the point for checking the gpu, i have another pc a 1366 xeon and i put this gpu on there and it worked without any problem and produced a picture, also most of the cards i got wasnt producing pucture on other mobo but areworking on this 1366 mobo but still i have diffrent problems like this driver or keep crashing under load and similar issues