Originally Posted by
Biernot
I think for WoW it does not matter that much, which of the two video cards you get, as it is still heavily cpu dependent. Both cards will run wow on ultra (minus shadows) fine (i would expect about 30fps in raids). If you are in an effects-heavy situation, the 7870 might get a little better fps, but the limiting factor would still be the cpu.
If you plan for other games than wow, the 7870 should have considerable better results (20-30% in most games).
P.S.:
Just to clarify, what you are getting yourself into, if you chose the cheap case+psu combo:
1) The case most likely won't have a very good ventilation. So i would not advice to put a more powerful card in there than the 7870.
EDIT: After having another look at it, it should be doing fine. But i would suggest to get an additional cheap 120mm fan (replace the 80mm in the back and move it to front). Just make sure to get fans with a molex adapter, as your board has a maximum of 1 usable case fan connector, if even that.
2) The wattage on the power supply is most likely very "polished", as only a fairly low percentage will be usable as +12V (which is where you need the most of: CPU, GPU and drives). I don't have the exact specifications of that PSU, but i wouldn't expect more than 300W on the +12V rail. (But this is enough for the hardware we are talking about)
Just for comparison: Good psu's can usually deliver their rated wattage nearly alone on the +12V (e.g. my BeQuiet 480W 80+Gold can put out 456W on the +12V)
3) Even cheap psu's should be fairly quiet, but be prepared that you might actually hear it (which you shouldn't be able to with a good one).