You see, 4650 is both ancient and weak. How about benchmarking something more interesting like HD5000/6000 GPUs? Unfortunately, for some obscure reasons, most of phoronix benchmarks for Radeon are done on such an ancient GPU. You see, these days you can't buy HD4000 GPU in unused condition anyway.
Furthermore, core i7 + 4650? Oh, that's a really decent example of very unbalanced system. Hi-end modern CPU + Low-end and outdated GPU? Really strange scenario.