Playstation 3's Power?

I'm wondering how can the PS3's GPU play high-end games like NFS Pro Street, Call of Duty: World at War, COD 4 etc, well in fact, the power of the GPU is slightly less powerful than the 7800 (see proof here: a href="http://www.theinquirer.net/inquirer/news/532/1015532/playstation-3-gpu-slightly-less-powerful-than--geforce-7800)." rel="nofollow"http://www.theinquirer.net/inquirer/news…/a Well, In fact the CPU of the PS3 is powerful, the GPU can run NFS Pro street in 550 Mhz core clock( info was gathered on wikipedia.org here:a href="http://en.wikipedia.org/wiki/RSX_%27Reality_Synthesizer%27)." rel="nofollow"http://en.wikipedia.org/wiki/RSX_%27Real…/a The PS3 can play pro street with no lag in a 550 Mhz core clock even when there are many models! Incredible! Is it about the algorithm of the PS3 which makes it powerful enough to run high-end games?