GeforceFX系列顯卡在CS:S中被Valve設定為只能跑dx8.1
GF6/R3XX/r4xx可正常使用dx9

測試硬體為
AMD Athlon 64 3400+ CPU (2.20GHz, 1MB L2 cache);
ASUS K8V Deluxe mainboard;
OCZ PC-3200 Platinum EB DDR SDRAM (2x512MB, CL2.5-3-2-8);
Microsoft Windows XP SP2, DirectX 9.0c, NVIDIA ForceWare 61.77, ATI CATALYST 4.8.