Minimum System Requirements
Pentium 4 2.0 GHz or Athlon XP 2000+ Processor
512MB RAM
3D Hardware Accelerator Card required
100% DirectX 9.0c compatible 64MB
Hardware Accelerated video card and the latest drivers

Test System
3.0 GHz Intel P4 with HT
1 GB of Dual Channel RAM
NVIDIA GeForce 6800 GT 256

Game is good looking no doubt.

The Doom 3 engine looks much better in Quake 4. It is hard to use the word “pretty” with a game that has creatures trying to rip your face off but pretty sums it up the best. Large outdoor spaces with vast skylines and towering buildings in the distance is just one of the improvements compared to Doom 3's cramped corridors. The indoor levels feature a smart use of lighting and shadows that look amazing. Environments are extremely detailed making them seem all the more real. The player models are some of the best I have ever seen. They have great textures and characters with faces that are easy to recognize for a change. Rather than having some stand out feature, they look like real people in that subtle way. Quake 4 makes the most out of sound in the game, from the music to the ambient noise. On the downside, positional sounds in multiplayer are not always coming from where you think they are coming from and can cause some confusion when trying to hunt down an enemy.

Patrick Todd did a nice feature on the weapons of Quake 4. So if you need to get acquainted with the weapons check it out.