Can i reset PRam / SMC with out grey boot screen?

[Amethyst]

I haven't any EFI32 GPU in my Mac pro 1,1
(My 3,1 just upgrade to 6870 that EFI64 card)
So i want to reset pram smc bios for the sake of upgrade cpu.

How can i doing it?

 

[flatfoot]

Look up those routines in the Apple Knowledge Base. You don't even need a display connected to your Mac to perform them, so you're good to go.