The Imagination PowerVR SGX540 core in the Galaxy Tab is a VERY powerful GPU to compliment the quite capable Hummingbird. The 540 uses tile-based rendering to reduce computation and memory requirements for processing graphics which improves performance quite a bit. It's no wonder that the 540 is one of the top GPUs.
Here's some info:
http://www.imgtec.com/factsheets/SDK...e.External.pdf

I should note, though, that while the 540 compares well with discreet GPUs, it has been bested by the HTC G2's Qualcomm Adreno 205 (the snapdragon 2nd gen GPU) by a good margin. Still, it performs very well for a modern mobile GPU!
http://androidandme.com/2010/10/news...owervr-sgx540/

<offtopic>
Either GPU is more than capable of displaying current games, but will be BLOWN AWAY by future dual-core CPU/GPU combos. The Samsung Orion SoC is claimed to have a 500% improvement over the current Hummingbird, and the Adreno 220 will be a force to be reckoned with as well!

But this is not the point of this post.
</offtopic>

What's most interesting is that the 540 offers GPGPU capability! For those that don't know, it is moving some computation onto the highly capable GPU. I suppose this should be obvious as it has programmable shaders, but this is a feature that seems not to be explored deeply with current software. The fact of the matter is, that games aside, and coupled with the 540, the Tab should be capable of some pretty impressive software.

There's little reason to suggest that the Tab is incapable of doing 3D modeling, video editing, large graphic editing, vector editing, animation, or other applications that we tend to exclusively associate with the desktop. Moreover, it could run these applications at a good clip with well oiled code and without a tremendous strain to the CPU with correct GPU/DSP offloading.

While I *do* like performance progress, I feel that it makes developers lazy and many of these optimizations will be overlooked, and it will result in more bloated code that relies heavily on the host CPU for simple calculation. I suppose this is not bad, but it would be nice to see the full potential of the Tab tapped and the GPGPU explored more thoroughly!

Perhaps it still will!