Hi,
I read at http://www.gpgpu.org/w/index.php/FAQ#Where_can_I_get_information_about_GPU_floating_point_precision.3F_Is_it_IEEE-compliant.3F older ATI chips use 24 bit floats which are internally stored into 32 bit floats.
Is there a possibility to use 32bit floats at these chips, perhaps using
OPTION ARB_precision_hint_nicest;
!!ARBvp1.0
Best,
Andreas