I know.. but I won't get more for my 7950 than what I'd have to pay for a 750Ti. And 230 watts is like a tad bit more than running idle 
If you're using 230W at idle something is wrong. All of my rigs use 40-50W at idle with no vid cards, 100-120W with 3-5 cards.
My rig at idle using 255W (AMD6300 + 280x+7870+7850+5670 + 6 funs)