Dear Gordon, I assume that you changed the default "nv" driver in your XF86config(-4) file to the Nvidia driver "nvidia". I've replaced on my private Pentium III (733 MHz) PC a GeForce2 GTS against a GeForce4 Ti4200 and I also observe less improvement than expected. Here are my observations: 1. Under Windows98SE with 3DMark2001 I get a ~50 % higher score, which is probably okay. 2. Under Linux I get a ~ doubled frame rate for the simple OpenGL benchmark program "gears" in full-screen mode and somewhat less than this in the Vulpine OpenGL Mark, which is fine (Nvidia driver 31.23). 3. But, puzzlingly with pymol and on-screen rendering of a complex secondary structure sketch (without ray-tracing) I only get a moderate increase (~ 10 %, or so) of the movie frame rate compared to a Geforce2MX440 running on a Pentium III (450 MHz) in my office! Here, I would really expect a huge difference in frame rate. I also don't understand this. A possible explanation would be that pymol, upon automatic detection of the graphics card, internally changes the complexity of the calculations resulting in a slower but improved image?
Best regards, Dirk. On Wednesday 08 January 2003 09:40, gordon wrote: > Hi > I recently upgraded from a geforce 2 to a geforce 4 ti4200, and I don't > really notice a performance improvment (running linux). I judge this > based on how smoothly large sized proteins can be rotated with spheres > on. > Just wondering why? > > Thanks in advance > Gordon -- **************************************** Dirk Kostrewa Paul Scherrer Institut Life Sciences, OSRA/007 CH-5232 Villigen PSI, Switzerland E-mail: dirk.kostr...@psi.ch Phone: +41-56-310-4722 Fax: +41-56-310-4556 WWW: http://www.sb.psi.ch ****************************************
