Hi,
Computers 2 and 3 are older by about 3 years. My original sim was single screen running on my 32 bit copy of X-Plane. When I bought my super computer I was advised to buy and run the 64 bit version. I then learned that X-Plane will only allow users to run a maximum of 3 screens on one machine. So, I already have 1 machine running 64bit and 1 running 32 bit. I'm a trainee pilot and not that much of a computer expert and have no idea if the older machines will even run 64 bit X-Plane and it seems a waste of money to dump the existing 32 bit version I already have.
Philip