If only this can work without overheating in first couple of minutes, it would be ~4.32 GH/s. (8 x 5970)
~55.7074180016 BTC per day at next difficulty (after tomorrow).
Let's say that difficulty will increase by 30% every 10 days for easy counting.
557 + 340 + 273 = 1170 BTC first month
190 + 133 + 94 = 417 BTC first month
66 + 46 + 32 = 144 BTC third month.
8 * 300 = 2.4 kW just for the cards * 24 * 30.5 * $0.1 = $175 per month for power, oops, we are not profitable already.
I did a computation like this and in my country it won't be profitable in around 30 days.