原文出處:
http://www.gamersdepot.com/hardware...ollowup/001.htm


Valve向Gamer's Depot表示，
HL2若偵測到使用者使用的是NV 3X，預設值會採用 DX 8.1模式。
原因是NV 3X在DX9模式下效能不彰。

原文如下:
In fact, Valve tells us that Half-Life 2 will default DirectX 8.1 mode for NV3x hardware based on its lack of performance under true DX9. To give you an idea of what DX8, DX8.1 and DX9 users will see we have some comparison screenshots ?notice the water reflections between the three various modes.