I have bought a Radeon 4850 graphics card to play some games in Windows under boot camp. The card comes with a mini 6 pin power connector that connects to the graphics card and supplied lead has at the other end a 4 pin power connector to go into the computer's power supply by the looks of the diagram in the box. My question is do I need to connect this to the Mac Pro power supply? The ATI 2600 card in the machine doesn't look like it connects to another power supply. If I do need to use this then I can only see two small power connectors on the motherboard near the fan, does anyone know anywhere in the UK that would sell a compatible power lead?