Zero Bog said:
I have a PSU with 500W, and 15A on 12V rail ( i know it's small) , but recently i bought a MSI GT 440 video card that need >38A , so i'm liable to bought a new PSU . My question is what you recommend me to buy ? I notice that must have min. 450W .
gtx440 itself consumes around 60w only and if you have a 100w cpu then you need around 160w on 12v rail (combined) and thus means you need around minimum 14a rating on 12v rail (combined).
so check combined wattage on 12v rail of psu, if around 200w (aging) or above then you can use that 440 with your current psu (no overclocking)
i think your psu have around 300w capacity on 12v rail, if so then you can try overclocking too, tell us the combined wattage on 12v of your psu