Flashing VBIOS on RX580 pulse

[10s]

Hello!

 

Full problem and explanation (kinda irrelevant, but I thought someone may ask why flashing):

 

I'm having some bizarre problens lately with my RX 580 (8GB Sapphire Pulse).Under specific games, when there's an intense GPU use but then suddenly relief (ex: intense racing, then flashback in F1 2018; after screen game results in PES2018) GPU fans go full spin and screen goes black.

Also, on other applications, when fans ramp up to speed, they sometimes don't slow down.

Then, PC boots without video. Only works again if i reseat the card on PCIe slot.

Now, all I could find out about it:

 

Only happens in some games, it does fine on torture tests;

Temps are ok, around 70°;

Reapplied termal paste on die (just the chip, not the vrms);

Was happening on old rig, upgrading platform didn't help;

Cables are OK;

And a lot of other possible fixes.

 

So, I'm thinking about flashing the VBIOS as it maybe corrupt.

 

Thing is, there are 2 bios available for that card. And the question I ask you is this:

 

TL;DR:

 

What bios should I update? Both from techpowerup, both for the same card.

 

Never flashed GPU BIOS before, so if you guys could help, I'd really appreciate!

 

I apologize if I violated any rule here, I'm fairly new to forums and all that stuff...

Thanks!