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Major Nelson: Xbox 360 vs. PS3 (Part 2 of 4) | |
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||
| Time: 15:14 EST/20:14 GMT | News Source: Major Nelson | Posted By: Brian Kvalheim | ||
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The Xbox 360 processor was designed to give game developers the power that they actually need, in an easy to use form. The Cell processor has impressive streaming floating-point power that is of limited use for games. The majority of game code is a mixture of integer, floating-point, and vector math, with lots of branches and random memory accesses. This code is best handled by a general purpose CPU with a cache, branch predictor, and vector unit. The Cell’s seven DSPs (what Sony calls SPEs) have no cache, no direct access to memory, no branch predictor, and a different instruction set from the PS3’s main CPU. They are not designed for or efficient at general purpose computing. DSPs are not appropriate for game programming. | ||
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