Hailed (by Apple) as the fastest iPhone ever made, a lot of attention has been paid to the new processor and RAM specs in the iPhone 3GS. Those new specs will certainly translate to a faster phone, but most likely marginally so, noticeable only within apps that do a lot of algorithm munching. What’s likely to be truly impressive on the 3GS is the new graphical capabilities that come from the Power-VR SGX GPU inside the phone.

Hubert at Ubergizmo, who used to program for Nvidia, gave a quick breakdown of the improvements we could see in iPhone gaming, and they’re pretty damn impressive. As the article notes, the new GPU offers improvements in two traditional aspects of development. First, it allows more triangle processing per second, and second, it gives a serious boost to the number of pixels that can be modified per second.

More than the hardware, though, is the options the new GPU will offer developers. The new chip gives coders access to some of the same principles used when developing games for the Xbox 360 or the PS3. Haven’t seen many shadows on the iPhone? They’re coming. So is bump mapping, normal mapping, light mapping, and multi-textures, making it possible to render complex 3D environments with an unprecedented sense of realism.

While people complained that this iPhone release was an evolution rather than a revolution, the changes to the GPU will be revolutionary for the hand-held device, making gaming the real breakout feature of the 3GS. I was unimpressed by the game demos at WWDC. Hopefully that wil change when developers have had their new kit for a few months.

Source: Ubergizmo