created a custom config file for RAGE on my new GTX 570, also worked with my 5850 ati card.

heres more info about the issue:
http://www.geforce.com/News/articles/how-to-unlock-rages-high-resolution-text...
http://forums.guru3d.com/showthread.php?p=4117800

my config settings are below (thanks to BlackZero at guru3d forums for the info) save it as rageconfig.cfg in rage main directory, base folder. ie Steam\steamapps\common\rage\base

seta com_videoRam "2048" //sets the Video Card memory Set this to the amount you have in MBseta com_maxfps "60" //limits the frames to 60 can be changed to what you desireseta image_anisotropy "16" //Using the highest setting here but you can set as 2, 4 or 8seta image_usecompression 0seta image_filter "GL_LINEAR_MIPMAP_LINEAR" //filtering for light mapsseta image_preload "1" //Use preload images when ever possibleseta image_lodbias "-1" //LoD settingsseta image_ignoreHighQuality "0" //Sets up for using HQ gfxseta image_ignoreLowQuality "1" //ignores the low texturesseta image_useCache "1" //Enabled Cache to allow the textures to load properly without poppingseta image_cacheMegs "125" //Cache size in Megabytesseta image_cacheMinK "50" //Cache minimum size in kilobytesseta r_swapInterval 1 //VSYNC 1 enabled, 0 diabledseta r_useHighQualityPostProcess "1" //Fore High Quality post proccessingseta r_shadowsHighQuality "1" //Fore High Quality shadowsseta r_displayRefresh "0" //keep it so the engine doesn't double render a frameseta r_renderer "best" //highest rendering optionsseta r_multiSamples "8" //Set this to 16 or 8 if you're having low-fps as 32 is the Max Multi-samplingseta r_useHBAO "1" //Ambient occlusionseta r_useRenderThread "1" // 0 Disable or 1 Enable threaded rendering useful for newer cards to increase performance.seta r_visDistMult "1"seta r_useMotionBlur "1" //use blurseta r_skipBump "0"seta r_skipSpecular "0"seta r_skipNewAmbient "0"seta r_shadows "1"seta r_cgFragmentProfile "best"seta r_cgVertexProfile "best"seta vt_lodBias "-1" //LoD settings//below is cache settingsseta vt_pageimagesizeuniquediffuseonly2 "16384"seta vt_pageimagesizeuniquediffuseonly "16384"seta vt_pageimagesizeunique "16384"seta vt_pageimagesizevmtr "16384"