Just so you know, you will need better power supply than that Be Quiet! Pure Power L7 350 Watt, 20+24 Pins, 80 Plus Rating as Sapphire Radeon HD 5750 512MB needs 450 Watt or greater power supply with 1x 75W 6-pin PCI Express power connector recommended (600 Watt and two 6-pin connectors for ATI CrossFireX Technology in dual mode)

EDIT. I have personal experience what happens if your power supply isnt good enough for your card as my old power supply 330 Watt wasnt enough for my Ati Radeon 4850HD. My screen went completely black when my pc had only been on for 5-10 minutes. After i bought 700 Watt power supply my graphic card started to work properly.