I think it's because you have specified 16bit as depth in your xorg.conf, which saves video memory compared to 24bit. Try also without AGPSize.
Please attach Xorg.0.log from running without an xorg.conf.
I think it's because you have specified 16bit as depth in your xorg.conf, which saves video memory compared to 24bit. Try also without AGPSize.
Please attach Xorg.0.log from running without an xorg.conf.