Well, the first time I flashed with the same bios, only chnaged then file extension from bin to rom. I noticed that in device manager the PCI ID didnt changed, so I think it's a MAC Bios. Then I flashed with the bios razrx sent me, this time I can install drivers, but I can't use DVI, no signal from DVI at boot
After some time, before I even got a chance to run a game, I noticed at one reboot that the text is begining to shake and display gone a little bad. I turned off the computer and removed the card. Man, it's a HOT card, even the plastic fans burns my fingers, it's as hot as a Voodoo3. The fans are working and make quite some noise, the case is very well ventilated (big chieftec case, 65 cm height, full of fans, excelent airflow).
For now I had enough with this V5, maybe other time I'll try to play with it again, thanks to all that helped me with suggestions here.