After some searching we now got what you were looking for: On computers with an AMD processor, programs that use Microsoft DirectX 8.1 may quit without displaying an error message. The same programs work correctly on computers with Intel processors. The DrawIndexedPrimitive function stops working without displaying an error or debug message. This occurs because of a code error in the AMD-specific optimized code. This code error may lead to heap corruption. Read more... This update will patch your system to: 06-May-2002 13:51 5.1.2600.44 1,180,672 D3d8.dll Download Q321178_WXP_SP1_x86_ENU.exe | Click on Drivers main category For more information please visit Microsoft.