Which would run FSX better, a 3.4 GHZ Pentium D or a 2.66 GHZ Core 2 Duo. I understand the Core 2 Duo is generally a faster chip, but I heard that FSX doesn't take advantage of multiple threading.
The core 2 duo is still faster in single threading stuff vs pentium d, so it's better going with the pentium core 2 duo, note, both are dated, there're better cpus now out there.