I have the 7870 version of this card.
Same shader count, cooling, and color scheme.
The only difference is the 270x has 200MHz more mem clock and 100MHz less core clock.
One thing I noticed is the vgpu is locked on mine, is it locked on your 270x ?
One of the launch promises for these new cards was being voltage unlocked.
Here is my monitoring/setting app if you want to check http://sterlingdesktops.com/pub/lsad...-0.1.1.tar.bz2