EFILive itself is not particularly demanding. If you can have a dedicated LT it will work with most anything.
I have run E-38 stuff with XP 800mhz with 256 ram. Paul says all EFILive functions can run below USB1 speeds so even USB2 is not an advantage.
It is all the other stuff we load on that bogs them down.

Having said the above this one is a 1800 mhz and can do it all and yet is not noticeably faster with EFIlive.