From bruceongames.com:
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GTA IV, quite famously, was delayed from being a 2007 release to being a 2008 release because of problems Rockstar were having with the Playstation 3 version of the game. And now Codemasters admit that whilst the Microsoft Xbox 360 version of Grid runs at a solid 30 fps the Playstation 3 version doesn't. These are just two of the latest of a long stream of disappointments with the comparative performance of the PS3. What is happening here?

For the PS3 Sony wanted to have a technology advantage so they developed, in conjunction with Toshiba and IBM, the Cell processor. A clean sheet design with many innovations this took $400 million and four years to develop. The intention was to use two of these in the PS3, one as CPU and one as GPU. However at the last minute Sony realised that the Cell GPU wasn't up to the job so they went to nVidia and bought their 7800GTX GPU. This gave them a number of disadvantages:
* It wasn't designed or optimised as a console GPU. It was designed and optimised as a PC GPU.
* The whole architecture of the console was compromised by the last minute change.
* The 7800GTX has less raw processing power than the Microsoft Xbox 360 GPU.
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Full Story: bruceongames.com

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