Sawtooth w/ OWC 1GHz upgrade
Bought this Other World Computing 1-GHz cpu upgrade years ago.
I think it cost ~ $220

Sawtooth was originally 400MHz.
IIRC the PC vid card was originally a 9700 non-Pro 128MB.
It shows up as a 9800 Pro in the ASP.
I used a PC to flash it for Mac.
A flashed Sil3112 SATA card
(per harrymatic instructions) connects a 149.5 GB drive (Partitioned).
Desktop Manager 0.5.3 freeware makes for multiple desktops
(the line-up of 4 rectangles plus its prefs icon just left of MenuMeters).
ffmpegx is crunching out a possible DVD image,
but whether I set up the configs correctly - only in many hours will I be sure
Tomb Raider 2013 screenshot makes the desktop. Love this game!
I play TR on Bootcamp in my beat-up MacPro 1,1 with a Radeon 5770
(Professionally flashed).
Unfortunately, my MacPro 1,1 suffered that fairly common issue of the
lower mobo RAM slot becoming defective causing random blackouts & reboots.
So now it just works with 2 x 2 GB RAM on the daughter card in the top slot.