and put 200 GH/s with current difficulty and exchange rate and now i getting 26$ per day average
Now my question is if i have 200 GH/s hardware then i think i can really mine bitcoins on it so for getting 200 GH/s which cards combination i will need?
There are hardwares that use ASIC chips to mine BTC. BTC mining is kind of absolete for new users with out huge funds. So better stick with altcoins. and as Evellish said GPUs will be needed in a huge quantity to mine BTC and that too with out any surety of hardware breakeven(ROI).
By the way 600 KH/s can earn you lots of doge per day. calculate here.
http://www.coinwarz.com/cryptocurrency/?sha256HashRate=0.00&sha256Power=0.00&sha256PowerCost=0.0000&scryptHashRate=600.00&scryptPower=0.00&scryptPowerCost=0.0000&sha256Check=false&scryptCheck=true&e=MtGox