Nenamark, GLBenchmark and GPUbench are test programmes that put a heavy load on the graphical part of a smartphone or tablet. The first two benchmarks mainly focus on the performance of the GPU in games, while the last one is a more general GPU benchmark. A new version of Nenamark has been released in the meantime.
The GPU of the ASUS Transformer Pad Infinity TF700T is the same as in other Tegra 3 tablets. You do notice in the GLBenchmark scores that the GPU is running a Full HD screen. In the offscreen version of the test the Infinity scores on the level we're used to from the Tegra 3 GPU, but when the screen is on you notice it's a heavy load for the GPU and this is reflected by the lower score.