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Almost any G4 can run Tiger and about half of them can support 2GB of ram.

When you say run, do you mean run it well, or actually capable of running? I wanna say I remember the Tiger CPU requirements being G3, G4, G5 or Intel. I ran it on my 400MHz and 450MHz G4's when I used them and it was okay, not good or bad, just okay.
 
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