I have an i5 2500k proccessro and I am getting a radeon 6870 graphics card. I have a 460 watt psu and it says it needs a 500 watt most people say I will be okay are they right??
You could also use this if you are willing to use 4pin peripheral (molex) to PCIe adapters to get the second 6pin PCIe connector that a 6870 needs.
Corsair CX430 V2 $45 ($2 shipping, $10 rebate) http://pcpartpicker.com/part/corsair-power-supply-cmpsu430cxv2