I have
AthlonXP64 X2 4400
2gb RAM
160gb SATA2 HD
2 x 7300GT 256mb DDR3
My graphics started off looking like a very poor FS9. I was expecting more from my machine and FSX.
So, I started form the beginning.
Defragmenting
I used o&o defrag software that beats the standard XP defrag utility hands down. I used this to defrag my machine in a COMPLETE/NAME method. This placed files in order of folder/filename. Seeing as most applications run like this it was an immediate improvement.
Last file access stamping
I then disabled disabled last file access stamping. If you don't need to know when your files were last accessed then you should disable this feature in XP.
I did this by launching the command prompt, typing
fsutil behavior set disablelastaccess 1
and pressing enter.
Windows file indexing
This speeds up XP file searches but I rarely do this. It really can slow down disck access for FS9, FSX.
Open Control Panel
Select Add/Remove Programs
Press “Add/Remove Windows Components” button.
Make sure “Indexing Service” box is unchecked.
Increase CPU Priority To The Foreground Process
Because this next suggestion requires a registry edit, you should back up your registry first. To increase the CPU priority to the foreground process, start Regedit and navigate to the following key:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\PriorityControl]
Change the dword value of Win32PrioritySeparation to 26. Make sure the hexadecimal button is clicked for the base. You should then see the following value attached to the Win32PrioritySeparation keyword.
"Win32PrioritySeparation"=dword:00000026
Save your changes and reboot the system to run with the new setting. By default, the factory setting is usually 2.
FSX
Started with low sliders on all, then increased scenery and aircraft quality. Saved config after every change. Set FPS target to 20. I don't notice any difference with higher FPS.
Graphics
I have nVidia cards so I used the nVidia control panel. Once my frames were decent (to the naked eye) I increased my card settings to obtain better quality.
Hope this helps 😉