450W Graphics Power Supply Juice Box Keep using your original PSU, and add this Juice Box into the 5.25" drive bay of your computer case to feed your new CPU and graphics cards. With dedicated 450W power, the Juice Box easily satisfies the most demanding power requirements. Two pull fans and one push fan optimizes the thermal release. The Juice Box is synchronized power on with the main power supply, so you can begin use your computer as usual.