<div><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Beryl require significant amount of RAM access for the 3D chipset because each window is cached and updated as texture. The regular 2D X only use one framebuffer in video memory, at a time. Only requiering like width x heigh x 4 bytes (32bit depth) of RAMDAC accessible video ram. Beryl 3D X require width x heigh x 4 x num_of_windows_layers bytes of 3D chip accessible memory. </blockquote></div> I'm starting to realize that now. I thought AGP was supposed to use system RAM as additional texture memory? Here's the output of Beryl: ****************************** <div style="direction: ltr;">******************************** * Beryl system compatiblity check * ************************************************************** Detected xserver : AIGLX Checking Display :0.0 ... Checking for XComposite extension : passed (v0.3) Checking for XDamage extension : passed Checking for RandR extension : passed Checking for XSync extension : passed Checking Screen 0 ... Checking for GLX_SGIX_fbconfig : passed Checking for GLX_EXT_texture_from_pixmap : passed Checking for non power of two texture support : passed Checking maximum texture size : failed Root window size (1400/1050) is bigger then maximum texture size (1024x1024) X Error of failed request: GLXBadContext Major opcode of failed request: 144 (GLX) Minor opcode of failed request: 4 (X_GLXDestroyContext) Serial number of failed request: 39 Current serial number in output stream: 41</div>