Valve is adding multi-core processor support to Half-Life 2's Source engine in time for the release of Kentsfield. We travelled to Seattle to talk to Gabe Newell and his team about what this will mean for gamers and hardware geeks, as well as examining a new benchmark tool created to show off what can be done. In the first video, you can see a rain particle effect, as droplets interact with each other, and with the water on the ground, realistically. The second video shows collision being done. The benchmark evaluates the ease with which the CPU can calculate these in-game and two further particle effects

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