2006/2007 MacPro 2.66GH Intel Xeon. What version EFI should it have?

I have a 2006/2006 2.66GH Intel Zeon MacPro.  This version MacPro came with a 32 bit EFI firmware.  After having a new video card iunstalled at the Apple Store I found that my MacPro would no longer recognize bootable FW800 external drives or my eSATA external drives during an OPTION boot.  This function had worked perfectly before I had the video card switched out.  My FW800 drive DO show up on the desktop after boot and are accesssable... I just can no longer boot up my bootable SuperDuper backups as I had been able to prior to the video card switch.
My thinking is that the technician thought he was doing me a favor and upgraded my machine to the latest 64 bit EFI ... While the machine works fine my bootable backups are useless.
What version EFI SHOULD this machine have and how do I check the version to see if I am correct?  If this IS the case how can I restore the original firmware?
Thanks....

Here is some information for you.
You don't even say what video card. And the EFI in your sysem 1,1 or 2,1 isn't going to change into UEFI 2.x instead of 1.1 (which was developed in 2005, and doesn't have room to be flased to, nor would the motherboard be happy).
The rest, if you bought a card from Apple like ATI 5770 is not from having a new card.
That card requjres 10.6.4-1/2 or later, meaning you won't have a 10.6.5 DVD to boot from and can't use older DVDs. Or clones.  You need to find a way to update your backups.
In the past I could run a combo update against clones while booted from another drive. Last time I tried that, seems 10.6.x made that impossible, and harder to apply and test.
Only 2008 Mac Pro and later have the EFI64/UEFI (2.x) - that supports things like Nvidia GTX 285. There were two versions of Nvidia 8800GT (1st gen EFI32, and 2008+).  ATI cards work in all Mac Pro models - as long as the OS has the proper minimum build..

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