i what to konow if the corsair 750 is going to overkill thos sytem because i only use one gpu or i should get the corsair 650tx
asus p7p55d-e pro
pny gts 250
1 tb wester
4 ddr3 corsair
so please help
The 750TX is way overkill for your system; it can probably run two of yours.
Even 650 is unnecessary. I'd say go for the Corsair 550VX.