Half life 2 is no doubt the most anticipated pc game of all times.

Characters - Advanced facial animation system delivers the most sophisticated in-game characters ever seen. With 40 distinct facial "muscles," human characters convey the full array of human emotion, and respond to the player with fluidity and intelligence.

Physics - From pebbles to water to 2-ton trucks respond as expected, as they obey the laws of mass, friction, gravity, and buoyancy.

Graphics - Source's shader-based renderer, like the one used at Pixar to create movies such as Toy Story® and Monster's, Inc.®, creates the most beautiful and realistic environments ever seen in a video game.

AI - Neither friends nor enemies charge blindly into the fray. They can assess threats, navigate tricky terrain, and fashion weapons from whatever is at hand.

To measure performance we used the Video Stress Test(VST) that is available in the CounterStrike:Source beta available through Steam. We set all the details to the highest level and each time changed the resolution from 800x600 up to 1600x1200.

The improved gaming engine of Half Life 2 is known to generate high framerates, even with low-end graphics cards. This is well observed here, since all cards reported similar performance. However, the superiority of the AOpen 7800GTX SLI is shown as we move to the higher resolutions...

... and with AA and AF set at 4x and 8x respectively, this superiority is even more evident. All cards reported lower framerates, while the AOpen 7800GTX SLI remained at the same level.