To play Enemy Territory: Quake Wars you will need the following system specifications:

SOFTWARE REQUIREMENTS
Microsoft(R) Windows(R) XP/Vista (Windows 95/98/ME/2000 are unsupported)
Microsoft DirectX(R) 9.0c (included)

HARDWARE REQUIREMENTS
CPU: Intel(R) Pentium(R) 4 2.8 GHz or AMD(R) Athlon(TM) XP 2800+processor (Pentium 4 3.0GHz or equivalent for Windows Vista)
RAM: 512MB RAM (768MB for Windows Vista)
Video Card: 128MB NVIDIA(R) Geforce(TM) 5700 or ATI(TM) Radeon(TM) 9700 (full list of supported chipsets below)
Sound Card: 100% DirectX 9.0c compatible sound card
HDD Space: 750MB of free hard drive space, plus 200MB for Windows swap file
Internet: Broadband connection and service required for full gameplay and downloads. Features may change without notice.

SUPPORTED VIDEO CHIPSETS NVIDIA
GeforceFX Series (5700 or higher, not including 5700LE and 5700VE)
NVIDIA Geforce 6 Series (6200 or higher)
NVIDIA Geforce 7 Series (7300 or higher)
NVIDIA Geforce 8 Series
ATI Radeon 9700 or higher
ATI Radeon X700 or higher
ATI Radeon X1650 or higher