Gigabyte GTX560 Ti SOC
Far Cry 2
There isn't much between the reference and Gigabyte GTX560Ti's. Both of them are a way behind the rest of the cards, even the HD6950. Not everything can be overcome with just clock speed.
Such is the single GPU performance of Metro 2033 that the nVidia architecture regains a lot of the losses we've seen in previous benchmarks but there still isn't anything between overclocking a reference one yourself and the Super Over Clock from Gigabyte.