HD 7750 Requires 400W power supply and 500W or greater power supply after Crossfire,
Inteli5 3470 requires 77W power supply.
approximately you'll need 500W psu but if you've more money then you can use 550W psu,
No problem at all.
the decision is yours.
somthing in the 300-400 wat range should do as long as its a quailty unit from somone like corsar, antec, xfx, silverstone, seasonic, newer ocz, fractal designs to name a few
HD 7750 Requires 400W power supply and 500W or greater power supply after Crossfire,
Inteli5 3470 requires 77W power supply.
approximately you'll need 500W psu but if you've more money then you can use 550W psu,
No problem at all.
the decision is yours.