Hi,

Is there an easy way to make a PC graphicscard, like e.g. the 8800GT or ATI 4850/70?

I have searched the forum and web about flashing the cards with EFI rom, but I havent found anything that I find reliable enough...
Is flashing the only way to make it work?

Best regards
Ola

Yes, flashing would be the only way to make it work in a Mac Pro.

You would have to make sure you got a model that was capable of being flashed with a Mac ROM as Macs have a larger firmware than the equivalent PC card.

I recommend you read hardmac they have detailed instructions on how to install a 4870 / 4890 in a Mac Pro
http://www.hardmac.com/news/2009/05/13/ins...out-flashing-it
http://www.hardmac.com/news/2009/08/10/pat...lled-in-mac-pro

I recommend you get a 1gb 4870 or 4980 they are the best cards ATM

I suppose you could try the Hackintosh kext's like Natit and such. Although, I don't know if they'd work because the GPU probably needs to be initialized by a BIOS beforehand. Even if it did work, it would be a bit of a pain because you wouldn't be able to see the bootup graphics and stuff.

Just a thought. I've never owned a "real" Mac so I don't know exactly how those things work. I know a bit about EFI but not specific to Apple computers.

I've read that the newest mac pros don't need GPU reflashing, only need to adapt the power supply cables to feed the card :/

You might try here: http://themacelite.wikidot.com/
Also the ROM size will be smaller and you may have to physically change the roms.

Ciao,
Lou Cioccio

early 2008?

Yes, That is possible to flash the 8800 GT PC > Mac... but, the PCB must be green color not the blue

here is link in french

http://macbidouille.fr/articles/242/page1