A 6870 is only a mid range GPU.
I noticed a ton of difference going from a Phenom II to an SB system, and I bet the majority of people did too, as their current CPU was a bottleneck.
So, BD's IPC is important.
You have xfire tho.
Even if that was AMDs point its still taking it to the extremes because they did not show a more realistic scenario.

However...
