Wow, maybe a Cray or BlueGene/L? Seriously, that is a pretty significant load, crunching all of that data and pushing all of those monitors + audio. I would think you would need at least a 2GHz dual core processor. Just a guess. Only one way to know for sure... It may be cheaper to have 2 PCs, one smaller PC for ECU stuff, one beefier PC for everything else?