bios gpu driver

[thietpas]

The bios in my dl580 g5 won't recognize my gpu.  I presume thus that installing approriate drivers will prove useless.  I am looking at a bios update: 

Type: BIOS (Entitlement Required) - System ROM Version: 2015.08.16 (A)(1 Oct 2015) Operating System(s): Microsoft Windows Server 2008 x64 | View all File name: SP73042.exe (3.0 MB)

This is the only possible bios update available beyond what I have installed.  

Two questions:

It seems that this update is a security fix essentially.  WIll it also contain general updates such as those which would effect gpu functionality?

It also seems as tho this update is only available to registered users.  As I have acquired this dl580 g5 unit second hand is there any way to either register the unit as belonging to me even tho it is surely out of warranty?  Or is there a resource where such a download might be found by those of us who are dumb and new lol

Thanks for any and all perspectives