[REQUEST/HELP] HP Prodesk 600 G2 SFF

[inguerreroca]

Hello everybody. I write this post because I need help with my HP ProDesk 600 G2 SFF.
The problem is I recently bought a new graphic card and there is no way to boot the pc when the graphic card is installed in the PCIe.
Without the card installed, the pc boot perfectly and everythig works ok. But when installed, when I press the power button, the cpu and gpu fans start to spin for a few seconds and then both stop and enter in a boot loop.
I have tried absolutely everything, bios in legacy mode, checked every single option... I even changed the PSU for a bigger one. So I think the problem is due to a limitation in the bios. maybe in the whitelist?
I´m a noob in this matter. 
Can someone help me check the bios?

Mother board model: 795231-001
Latest bios: 02.59 Rev.
sp143399.exe(7.7 MB) file downloadable here:
https://support.hp.com/es-es/drivers/sel...pc/7633319

Any help is welcome.

Thanks!