GPU Upgrade advice

[Burthmfc]

I've got a 430w corsair psu and was looking for some advice on an updated to my gpu without having to change the psu. My specs are -

Mobo - asus m5a75 lx3
Cpu - fx6300
Hdd - WD 1tb
RAM - 4gb corsair vengeance
GPU - palit 2gb gt630
O/D - liteon

 

[Prithwi2050]

You can get the R9 270 which will be pretty much the GPU to be able to run on 430W. If you had a CPU with a 75W TDP or less I would have advised you to get an R9 270X. But your CPU has almost 100W TDp and so the R9 270 would be your best buy..

 

[3Dns]

I will suggest you an Asus 7790 1GB DDR5 ( 129$ )

http://www.newegg.com/Product/Product.aspx?Item=N82E16814121727

 

[Redheadsrule13]

A GTX 550ti is probably about as far as you can push it without being at risk.
Doing so will give you almost double your current performance: http://www.hwcompare.com/12836/geforce-gt-640-ddr3-vs-geforce-gtx-550-ti/