Archive for March 16th, 2009

Mac: use a Windows ATi Radeon 4870 in your Mac Pro

Monday, March 16th, 2009

The price for Windows 4870 cards is substantially lower than Apple’s.
The Canada Apple Store currently
lists one for $420,
Canada Computers has one for $210.
this MacRumors forum thread
people are discussing how to do this and what the pitfalls are.

Basically, download and flash the ROM from

One person said:

I just tried it on my Sapphire HD4870 (the 1st gen one, based on
ATI’s ref design).

I flashed using freedos and the following command line:
atiflash.exe -p -fs -fp 0 4870.rom
note: -fs and -fp are used to ignore SSID and P/N mismatches

And it works!

EFI driver is initialized correctly, (I don’t have the leaked MacOSX
drivers for this card, so I can’t tell if this one works too), and
bootcamp stil works (currently writing from GNU/Linux on my 2006 Mac

Only problem is : only one output is active, no dual-head, it seems
(at least using ATI’s linux driver)

I should note that doing this seems to make the analog output (SVGA) not work. DVI is fine, though one person reported the “top” port as only going up to 1024×768.

Be careful out there. Read the thread for info on which cards work, and what possible side effects there are.