zbook Does anyone here have a ZBook 17 G5/G6 and tried different MXM cards? Like Maxwell and Pascal

[Will]

Hello, guys. I'm willing to pick up either a ZBook 17 G5 or a ZBook 17 G6 as they were the last notebooks released with MXM support, but I couldn't find anything about upgrading or downgrading their graphics card. About the ZBook 17 G5, I would like to put a GTX 1070 on it, has anyone tested it? I think it would work since originally the G5 came with Pascal GPUs, but I'm afraid of having some type of whitelist in the BIOS. And about the ZBook 17 G6, has anyone tested if GPUs from older architectures work? Like Pascal and Maxwell 2.0

[Reciever]

HP tends to have the vBIOS stored in the system BIOS, versus the more common scenario of the vBIOS being present on the MXM card itself. 

 

Not sure if the System BIOS can be modified to accept "non-standard cards" or not