Are you running directly on a Win version or using a Mac OS Win emulator with Win running under that. Running under a virtual platform slows things up.

 

RC audio works by caching the phrases to a fully assembled buffered response and for long messages such as ATIS and CD can take some time if the environment performance is not up to par. Check out your disk access indicator when waiting for the response.

 

FS itself, RC, and perhaps other apps you are running will/may not take advantage of the multicore features of your processor. In addition most FS graphics/model rendering (as FS coded) is performed by the main CPU. Do you have a separate audio card or are you using a motherboard audio chip.

 

In FS benchmark tests it is mainly the CPU clock speed that determines overall performance. It has been demonstrated, however, that Win 7 does improve graphics rendering performance working around the lack of graphics specific coding in FS.

 

Finally, with a lot of processes running, 2.2 GHz is kind of slow. You also need to check if you have sufficient ram and ram page swapping (virtual ram) is not constantly taking place. That would slow down your disk access.

 

As stated, turning off the display text option in RC is the first improvement.

Damn, display text was already unchecked. I thought you guys meant the text itself, like 'req higher', 'contact ground',...

 

Changing the priority didn't do anything either. I guess it's just my laptop.

 

I run FS9 directly on Windows (XP, 4gb of ram but only 3 is useable due to XP itself). Nothing else is running. It's an onboard audio chip (I guess, just plug my headphones in to the side of the laptop).