Gigabyte X58A UD3R V2 Review
The processor tests of SiSoft Sandra demonstrate how pure they are. The Sabertooth 4.2GHz slots neatly between the 4GHz and 4.4GHz overclocks of the UD3R whilst the stock tests are as near as inseperable as you're likely to get.
In the Multi-Media tests their is clearly a limit of some sort reached at 4.2GHz with the extra 200MHz of the UD3R not leading to any significant improvement in results. At stock we're again inseperable. Let's move on.