Hey guys Im buying a new graphic card and im wondering if i need a new psu to support it .
My current PSU is a Antec BP550 Plus, 550W.
What im planning on buying is a Ati Radeon 5850 OEM 1GB GDDR5. and i currently have an xfx radeon 4850 1gb ddr3
cpu: AMD Phenom II x4 840
mobo: GIGABYTE...