Barefeats compared the top-of-the-range iMac equipped with Geforce 8800 GS with the model having Radeon HD 2600 and even include Mac Pro equipped with a 8800 GT in the comparison.
The 8800 GS comes out very well, being approximately 10 to 15% less powerful than the 8800 GT, however more than twice as fast as the 2600 in all the games tested.
As always, the Radeon only could compete when one uses it with pro applications of Apple, or with Core image. In all the other cases, it is submerged.
One will note however that Apple has made a very small effort, the Radeon 2600 of the iMac 2008 being a little faster than that of the preceding range, by approximately 10%.
In short, if you buy a iMac 24" and you are not short of 120€, the cost of the Geforce option, take this card. You will have a machine that will last a longer time before being overpowered by new machines.
[translation by crispin]
