Maybe this will help, OFF supports the following 32 bit color screens with out distortion:
16:10 = 1680x1050 & 1440x900
16:9 = 1600x900 & 1280x720
16:12 = 1600x1200, 1280x960, 1024x768, 832x624 & 800x600
I have a 22" LCD runing native res of 1680x1050 with an older Nvidia 8800gts 320mb with a 2.4ghz Intel core 2 duo, Antec TP3 650w PSU, 2gb fast ram, a Sound Blaster X-Fi sound card, Windows XP Pro v3 and I use TrackIR5
I have OFF settings in the workshop CFS3 configuration set to 5 planes, 3 both terrains, 4 for clouds and effects. I get smooth flying in the 40-60 fps range and it looks great.
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rabu ...[|8~'
Windows XP Pro SP3
Intel Core 2 Duo E6600 2.4ghz
Gigabyte GA-EP45-DS3R NorthBridge P45E MOB
Patriot 4gb DDR2 800 SDRAM
XFX GeForce GTS250 1gb w/22" LCD 1680x1050 32x dpi96
SB X-Fi audio card
Antec Trio TP3-650
3 WD 7200rpm 3GB/Sec SATA drives