there is an email from James Stround on the ccp4 bulletin board concerning the fx4500. i don't know how many o users also monitor ccp4 but i thought some of you might not. here is a clipping from his email: 'We have a few dual core G5s with Invidia Quadro FX 4500's running OS X 10.4.7. Its a good combo and performance seems to be more or less worth the money (expensive, but high performance). However, I found a terribly insidious bug when running these cards under "thousands of colors" (16 bit)--a bit depth I had set arbitrarily, if I indeed ever consciously set it at all.' in the Display System Preference applet, you can set the number of colours to millions, thousands or 256. if you use o, you should have this set to millions. o uses a graphics api called opengl, and is written to work in so-called RGB-mode. there is a clumsier alternative called colour index mode which is mainly of historical interest. according to his email, you'll get problems if you set colours to thousands. i don't know any graphics card that needs to be using anything other than RGB-mode. having said that, i remember that Stéphane Réty could fix a problem under XP with intel's built in graphics card where one of his solutions (the other was to downgrade the intel driver) was 'to run O in 256 colors mode'. so under XP, running a program written for RGB-mode and millions of colours with a setting of less colours seems to be allowed. OSX, however, doesn't like it. Alwyn Jones alwyn@xray.bmc.uu.se http://xray.bmc.uu.se/alwyn _______________________________________________ o-info mailing list (moderated) o-info@o-info.bioxray.dk http://o-info.bioxray.dk/mailman/listinfo/o-info
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