flashing benefits:
you get the grey apple boot screen / boot loader
you don't depend on the injector, you can move your card to any Mac pro
you can use overclock rom, get more performance
you can run OSX install discs when using 4890, with injector, you can't
flashing is quite easy, see page 1
but you should get backup of your rom first
(you might find that on google)
i believe no one has tried the xxx yet
you get the grey apple boot screen / boot loader
you don't depend on the injector, you can move your card to any Mac pro
you can use overclock rom, get more performance
you can run OSX install discs when using 4890, with injector, you can't
flashing is quite easy, see page 1
but you should get backup of your rom first
(you might find that on google)
i believe no one has tried the xxx yet