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Radeon 7770 For 500W +12V 18Amp Psu?
Hi, i just got a new Psu for my computer from my dad who got it from his job becouse they didnt need it, unfortunatly i now figured that its a pretty crappy psu.. With 2 12V rails 1 for the motherboard 15Amp and 1 for graphics cards 18Amps, I whant to upgrade my Gpu from a Geforce Gt 430 from asus to an Radeon 7770
But The Radeon 7770 says on a Gpu power requirement list that it needs a minimum 500W psu with 19Amps,
What happens if i just dont care and uses it with an 18amp psu insead?
And second, Lets say i run games like farming simulator 2013 at maybe 20 fps at maximum with my Gforce Gt 430 and tripple core AMD phenom 2.4Ghz, 4Gb ddr2 Ram. will i get a much higher fps with the radeon 7770 or will the cpu bottleneck too much?