I ve tested GFX cards ;RAM;MB !
Some Games cannot handled CPUS (Duron or Athlon) with high Tactrates .
I ´ver tested (Gigabyte GA-7VTXEx
with Geforce MX 400 and Infineon DDR RAM -256 and 1200 AMD Duron)
all Opengl games won´t work , also D3D Games won´t work , but you can Play longer
After I put in a 700er AMD Duron , all Games worked fine .
I think it is The CPU-Architektur or you overclocked your CPU`S .
Try do get the CPU Speed down .
I ,ve changed all components , only this with the CPU works .
Sorry for Bad english , but I hope this will Help you all .
It´s not a Software or Opengl Problem !
Also make sure you have the latest Chipset and GFX-Drivers .