nadam se da znas anglijski , mrzilo me da prevodim:
The difference between the MAC and PC versions of the ATI card are few.. VERY few. In fact there are only two.
#1 is the Apple Tax!, of course Apple wouldn't sell anything for their computers and not get anything out of it.. HUGE mark up on video cards makes them more money. The MAC version is $420 in canada directly from Apple, and the PC version (with 1gb of RAM mind you vs 512mb on the MAC version) will run you about $180 on sale.
#2 is the special EFI BIOS that enables the MAC Pro to recognize the card when inserted.
Now physically the cards are identical, both using the same RAM, same GPU, with minor changes on the MAC side to make it fit better into the MAC Pro case, most cards even use the SAME BIOS! So the PC version will work perfectly fine in the MAC Pro. By now you may be asking yourself, how the heck can I make the PC card work inside the MAC so that both MAC OS and Windows sees the card.. the answer is simple, find someone who has the MAC card, stuff it into a PC and clone the BIOS using free software available on the internet, then buy the PC version of the same card, (not sure if it'll work with the 1gb version, may only work on the 512mb. You may have to be brave and test it out) and use the same program that cloned the BIOS from the MAC version onto the PC version.
Sometimes this is tricky because the PC card BIOS has to support the size of the MAC BIOS, (because of the EFI information it makes the BIOS file larger than a PC version which doesn't include the EFI info.) As long as it'll fit into the BIOS you can flash the BIOS with the MAC file and it will work like a charm.
There are a few good sites that even provide you with copies of the BIOS files so you don't have to do any extra work hunting down a card to clone. Many people have used this work around for the previous MAC cards, including the ATI X1900 and the NVIDIA 8800GT. I myself have cloned an 8800 and even tweaked the GPU speed to get a little extra performance boost.
Have fun and good luck.. oh, and be careful not to fry your BIOS as this will void your warranty. But chances of that happening are pretty slim, I just like to warn people ahead of time.
