SPECViewperf's OpenGL nature has a mix of workloads that stresses the memory subsystem and scales well with CPU and GPU performance. With the GPU being capped in every test scenario, we've highlighted a couple of viewsets that react the most to processor scaling. In these, we saw the Athlon 64 FX2 6000+ chalking up to 6% performance gains against the FX-62. In spite of that, this OpenGL benchmark is unfortunately too much for the AMD processors to even dent a lower class US$220 Core 2 Duo E6400 processor!
There are however, more memory dependent viewsets (which we've not shown here), and these actually showed that the Athlon 64 X2 6000+ fared only just as well as the FX-62 or a tad worse because of its inefficient utilization of DDR2-800 memory.