Apple has introduced new graphics card firmware for its Mac Pro desktop computer, the ATI Radeon X1900 XT Firmware Update.

The software - which is a 668K download - updates the firmware on all the ATI Radeon X1900 GT graphics cards in the Mac Pro. The updater application will be installed in the /Applications/Utilities folder.

The ATI Radeon X1900 XT with 512MB of dedicated GDDR3 memory offers two dual-link DVI ports that can simultaneously support two 30-inch Apple Cinema HD displays.

The update is available via Software Update or for direct download from Apple's website.