FSX alread supports dual core. What they did was expand that use but do not confuse FSX SP1 dual core support as a full multithread application write because that is not what Ptaylor is saying. SP1 simply changes the cpu bound calls for the software and increases the 2nd core use, not use 100% of it.
I have flown SP1. It is well worth the wait and it will enhance performance quite a bit.
Hopefully it will be released by the end of the month.
So how exactly how much more will it improve FSX when it starts to use dual cores more efficently...?
The fixes involved are related more to reduction of the CPU bound calls than they are how much the 2nd, etc, core is poled. It is a combination of the two which provide the needed relief for the software to run better.
Aces looked toward the future when they designed FSX. I think they looked a bit too far ahead to the 45nm processors which are still some time from hitting the market. The 45nm processor cores will almost double the CPU ability but its not here yet and FSX is. New motherboard technology will be entering the market soon which allows direct connection to the GPU/CPU memory bus to each core. With that introduced all games, multithread or not but especially multithread, will have a huge boost the industry has not seen for many years.
Its not about how much of the 2nd, 3rd or 4th core they may use but how they are used in relation to the GPU(s)