Markoz wrote on Apr 24^th, 2012 at 12:03pm:

USCG76 wrote on Apr 24th, 2012 at 12:47am: Honest from RW pilot stand point. The default ATC that comes with any sim stinks. Best going online with IVAO or Vatsim. Then you'll get as close as it gets feel. The ATC is pretty much the same for P3D as it is for FSX, from what I have just experienced. Ouchh...!! I've heard that it should be much more realistic!...darn! To CAF: This is an old and obvious statement, however as long as IVAO and Vatsim don't cover the whole world you obviously can't totally rule out the built-in ATC. Morten Cthulhus wrote on Apr 24th, 2012 at 7:03am: I finally just got P3D but for me the performance are terrible ! FSX is fastest... I have to do something? Ouch! :o That's not good. C:\Windows (C:\ = Disk0 Partition 1 of 4) I:\Lockheed Martin\Prepar3D (I:\ = Disk2 partition 3 of 3) J:\Flight Simulator X (J:\ = Disk1 Partition 1 of 1) So basically, they are alone on the either the partition or the drive that they are installed on. Not sure if this could make that big of a difference or not. Mark

From what I've learned from NickN, FSX should be entirely on it's own disc and partitions are not particularly welcome in this context.
Also, especially regarding to FSX, Disk RAID and Crossfire configurations are baned!!
Apart from the partitions, I see that Mark's harddisk arrangement is exactly the same as mine, which runs nice and smooth here.

Morten