How flash uefi supported bios on gtx 550 ti?

[JackNew]

Hello.
I found here the topic that it is possible to enable UEFI on other cards, which are not gigabytes.
Gygabite has UEFI support bios for this card. But the others don't with same device ID.
I have an MSI gtx 550 TI.
I can't find a completely accurate model, but it looks identical to this one N550GTX-TI-M2D1GD5/OC
(I don't know if there are 2 different models that are the same in appearance)?
It also fits the specifications.

So if it can help how can I do that and can I restore the original bios if everything is not right with the picture?

I have never flashed bios. I bought a used one. But if I understand this, it looks like on this my MSI N550GTX-TI-M2D1GD5 / OC flashed bios from the MSI N550GTX-Ti Cyclone II 1GD5 / OC
I concluded that by the date of the BIOS, so if that has anything to do with that detail.

 

[JackNew]

I successfully added uefi to the existing bios

 

[Emmanuel991]

how did you do it? so that the video card is accepting uefi?

 

[AugeK]

In general there is no black magic involved as long as your actual BIOS size is 128MB.
With anything smaller than this: forget it!
Use GPU-Z to save a copy of your actual BIOS and check its size.