Updating nvidia bios
If you’ve got an RX 480 with a single six-pin PCI Express connector, I wouldn’t even try this particular “tweak.”The second problem with driving the RX 480 as hard as the RX 580 is the mammoth increase in power consumption and associated temperature increase.
Our review showed the RX 580 drawing 77W more power than the RX 480 under identical test conditions, and while this gap will vary depending on board quality, cooler capability, and the RX 580’s clock speed, every review of AMD’s second-generation Polaris found the RX 580 drew significantly more power than its predecessor.
Even today, there are sometimes performance gains to be had when swapping between BIOSes for different card models.
Exactly how well this works and which BIOSes you can swap varies from company to company and card to card.
When the RX 580 is, at most, 10 percent faster than the RX 480, and the risk to one’s card is substantial, I can’t recommend anyone tackle the project.
First and foremost, anyone with a six-pin PCI Express RX 480 is begging for trouble.When Tom’s Hardware wrote an RX 480 roundup they compared GPU and VRM temperatures on a number of cards and found significant variation between them.Worse, the individual test results for GPU and VRM temperatures don’t necessarily correlate well with each other.The first sign of a problem could easily be a dead monitor and the delicious scent of eau de burning PCB.This problem shouldn’t affect custom board designs from AIB vendors, but the first wave of RX 480s were based on AMD’s own reference board.
The link from earlier stated I do not have a qualifying product. You don't need to update your vbios if you're already running the aggressive fan curve, however, you may want to update the vbios anyways to fix the card for the next user of your card if you ever sale it.