I like to play games like crysis,batman, assassin's creed and also the upcoming games. So i am planning to buy sapphire AMD Radeon 6670 1GB DDR3 graphics card....I have an intel core 2 duo E7400 2.80Ghz, 2GB RAM... This card says that the minimum power is 400W and my psu is having only 255W... Does this card supports in my pc with low power supply?????????