Lucid Virtu Performance
We used MediaEspresso 6.5 to convert a 300MB mp4 video to YouTube format using both the Radeon HD 6970 and the Core i7 2600K. The Radeon HD 6970 completed this task in 4:46 minutes while the i7 2600K's graphics engine was 25% faster at 3:39 minutes when using the Virtu (D-mode).
Virtu had no impact on Metro 2033 performance as we received the same performance with just the Radeon HD 6970 as we did when using both D and I modes.
We experienced the same results when testing other games such as Civilization V: Virtu neither aided nor hindered the results.