GPU for my Xeon E5450 on 500W PSU

[trebblytv]

I have a xeon e5450 and my motherboard is a Foxconn g31mxp, i used the 771 to 775 mod. I want to buy a gpu because my gt610 is obbiously very bad.
I have a 500w psu and i don't want to buy a New.
What gpu's can you recommend me with no bottleneck?

 

[william p]

GTX1050Ti is OK with that CPU.