gpu downclocked

[Peree]

I brought a gpu that was "working" from local deal and i couldn't check if it works bcs i didn't have a psu that have 8 pin connector, so after a month i got a psu and can test my new gpu i started it and boom it worked to the login screen of the windows and then crashed. After that when i tried to start it again screen was buggy and i couldn't see right, after 5 min it crashed again. So i tried to clean the gpu, like 3 times, didn't work. After that i was testing psu if that is a problem but nop everything works fine, after that i tried another pc and it wouldn't even take the gpu (wont start just beep) so i made another pc of part i had around and i booted to bios at least but wont load windows just run in inf loop of restarting. So after that long day i was just thinking what does those dots and pixels on screen even mean and then i remembered overclocking how it can do something like this to your gpu but why does it happened to me i didnt overclock or downclocked it that's the time when i realise maybe the gpu bios is bad so i searched around and find the new bios for it, i was happy for the first time that day and then i was like how can i flash it if i cant boot to windows or even if i can i cant see a thing. So here i am after two days of work seeking help here. 

Gpu: rx 570 sapphire 4 gb

 

Update :

I checked everything on a card with multimeter and everything looks good only thing i think is bad is bios or chip i will try searching around for way to flash bios and i will try some hot air

 

So i checked it again after like 5 min and notice chip is not getting hot like before, so myb its power to chip thats problem?

[Praesi]

What exactly is a "local deal" ?

[Peree]

41 minutes ago, Praesi said:

What exactly is a "local deal" ?

It's from https://m.kupujemprodajem.com/index.php its like ebay but only in serbia

[Praesi]

Im sure this has nothing to do with any Bios. You simply bought a broken GPU and let it set dust for four Weeks before even testing it.

You could try to contact the seller. But since this is a private deal, i think he will give you the finger.

At least you learned something.

[Peree]

13 hours ago, Praesi said:

Im sure this has nothing to do with any Bios. You simply bought a broken GPU and let it set dust for four Weeks before even testing it.

You could try to contact the seller. But since this is a private deal, i think he will give you the finger.

At least you learned something.

Sir im here bcs i want to fix it and to learn something to thanks for replying