June 11, 2009 | | Comments 3     While not proven in any current
marketing literature or official tear-downs, simple deduction
would lead any careful reader to the conclusion that instead of
recycling the current-generation’s MBX GPU, Apple have
overhauled the 3GS with the newer PowerVR SGX processor.
Imagination’s website points out the major differences between
the two chips:  Where POWERVR MBX delivers fully compliant
OpenGL ES 1.1 capabilities as well as OpenVG 1.0 vector graphics
and extensive 2D capabilities, the fifth generation POWERVR SGX
Series5 architecture takes the TBDR capability to a new level.
With a level of scalability from 1 to 8 pipelines and beyond,
based on the unique Universal Scalable Shader Engine (USSE),
POWERVR SGX brings fully compliant OpenGL ES 2.0 shader-based
graphics capability to mobile and consumer platforms. However,
backwards compatibility also ensures that any applications
developed for POWERVR MBX not only execute, but do so with
better performance and efficiency than ev