I have a PowerBook G4 DVI 867MHz. I need to replace the logic board (big surprise). I found a 1GHz logic board from another PowerBook G4 DVI model. My question is, is this a direct swap? Or am I forced to track down another 867MHz logic board? Anyone...?

Thanks in advance!!
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PowerBook G4 Ti 15" 867 MHz DVI
1GB RAM - 120GB HDD - 10.5.4