I used that same rig for some months after AH2 came out. What really held me back was the CPU and 3D. I got a better 3D and was even able to fly on the old CPU for a while, just not around CV fleets or burning B24s (LOL).
He's got a way faster system than I did, so I think he could pull it off with that much RAM, easily.
I now know first-hand that RAM really helps (a lot) but you can get by without it.
