My old GeForce2 GTS card died recently, and I replaced it with a newSapphire Radeon 9600 Atlantis.After fighting many installation problems I finally got it running withFS2002, but I have a couple of problems still (neither of which happenedwith the old card):1. Frame rates drop suddenly from 15 to 1 or 2 for no apparent reason.2. PC locks occasionally, sometimes after switching back to Flight simwhen the display is black with compressed grey stuff like a mangledwindow in the middle.Nothing is running in the background when FS2002 is running.I think I've found some sort of clue about problem 1: the place I've hadmost problems is Florida. I have no special scenery in Florida, but I dohave Florida LandClass from Rob Brown (don't think this a problem) and Ihave Gerrish Gray's USA and Latin America autogen building textures -512, as well as White Night.I removed Gerrish Gray's USA and Latin America autogen buildingtextures, and the frame rate problem went away! - in the daytime. If Iswitch to night-time, the frame rate problem comes straight back. If Itake out White Night textures, the frame rate problem disappears again.HELP!Can anyone suggest why I should get almost zero frame rates withGerrish Gray's textures using the new card, whereas the old card(64MBDDR nVidia GeForce2 GTS, nVidia 41.09 drivers) gave no problems at all?Similarly for White Night textures?I realise that anyone wanting to help will need more info on what I'vegot, so here it is with apologies to the rest of you:Windows 98SE (4.10.222.A) on a Dell Dimension 933 MHz machine with 384MB memoryIntel Chip set 815EBIOS Version A05 (the original, haven't found out how to update it yet)BIOS AGP Aperture 64MBIOS AGP 4X AGP Cardno other relevant settings are available in my BIOSDirectX 9.0b (4.09.0000.0902)Sapphire Radeon 9600 Atlantis 128MB DDR MemoryCatalyst 4.3 Drivers -- have tried several othersHardware Acceleration: FullCurrent AGP Speed: 4XFast Write: OFFAnti-Aliasing: 2xMax Resolution: 1600*1200Anisotropic filtering: 2XAnisotropic Method: PerformanceTexture preference: High PerformanceMipmap level detail: High PerformanceWait for Vertical Sync: Always OFFTruform: Always OFFFS2002{GRAPHICS}FULL_SCREEN=0 -- makes no difference if 1PERFORMANCE_MODE=0DEF_PERF_MODE=4TEXT_SCROLL=1AUTO_LOD=0DETAIL_TEXTURE=1WATER_EFFECTS=3TEXTURE_QUALITY=3EFFECTS_QUALITY=2CLOUD_SPRITE_PERCENTAGE=0.520000GROUND_SHADOWS=0SMOOTH_VIEW=1IMAGE_SMOOTHING=1TEXTURE_MAX_LOAD=1024COCKPIT_HIGH_LOD=1AIRCRAFT_SHADOWS=1LANDING_LIGHTS=1IMAGE_QUALITY=0TEXTURE_BLDG=1TEXTURE_GND=1TEXTURE_WATER=1AIRCRAFT_TEXTURE=2SEE_SELF=1PROPELLER_VISIBLE=1LOW_RES_RENDERING=0LOD_TARGET_FPS=10NUM_LIGHTS=8{DISPLAY}Device=SAPPHIRE RADEON 9600 ATLANTISMode=1280x1024x32UPPER_FRAMERATE_LIMIT=15also in hardware rendering:Tansform & Lighting and Anti Aliasing OFF, MIP Mapping and Multi-Texturing ONLight Effects: 8Bi-Linear Filtering{TERRAIN}TERRAIN_ERROR_FACTOR=12.400000TERRAIN_MAX_VERTEX_LEVEL=19TERRAIN_TEXTURE_SIZE_EXP=8TERRAIN_AUTOGEN_DENSITY=4TERRAIN_USE_GRADIENT_MAP=1TERRAIN_EXTENDED_TEXTURES=1TERRAIN_DEFAULT_RADIUS=2.500000TERRAIN_EXTENDED_RADIUS=4.000000TERRAIN_EXTENDED_LEVELS=1{SCENERY}IMAGE_COMPLEXITY=4DYNAMIC_SCENERY=0DYN_SCN_DENSITY=0DAWN_DUSK_SMOOTHING=1Regards and MTIA for any help...Brian

You could try updating your MOBO controller chips (815 Chipset) drivers - http://downloadfinder.intel.com/scripts-df...SE&submit=Go%21 , if you are using earlier drivers.W. Sieffert

Thanks!Just one question...Do I have to uninstall the ATI Catalyst drivers first, or can I go ahead and install the new chipset graphics driver alongside the ATI drivers, so to speak?Best regards,

One issue may be is that you are running 384MB of ram with windows 98, 98 doesn't like much more then 256 unless you edit the reg to use it.

I finally found a fix, or at least a workaround...My standard test flight is taking off from Florida Palm Beach Co Club and doing a left-hand circuit - there's a lot of detail down there with Rob Brown's Florida Landclass. No other 3rd party scenery except Gerrish Gray's autogen buildings (512) and White Night textures plusEd Truthan's water textures.After trying just about every permutation of card settings and FS2002settings, I returned to my original FS2002 settings. Finally I triedchanging "Effects Detail" from High to Medium. Frame rates jump backinstantly from 1 to a smooth locked 15.Since I don't have any effects that I notice, this setting makes no obvious visual difference.Should anyone have a clue as to why changing Effects Detail makes such a difference do let me know, but otherwise enuff already, time to go flying!Thanks to everyone in various forums who helped...