When it comes to hardware, the Fusion Apps installation guide is surprisingly non-committal:
4.2.1 Hardware Requirements
Consult an Oracle Fusion Applications sizing-certified representative to obtain specific, customized system hardware requirements
Some googling suggests that Fusion Apps is going plonk the following on your system:
– several databases
– many many WebLogic servers
and the general consensus seems to be minimum 128G RAM
Oh….my….goodness 🙂