best psu for my pc?

Steampunk755

Honorable
May 9, 2013
11
0
10,510
hi all, i today bought a Gigabyte GTX 460 1GB for just 42$ but i have only the gpu and no other pieces. the description said that has no ovp, now the question is which psu should i buy? ihave 50$ max for the psu.
here are my specs:
acer m3802
acer g43-t mobo
tmpn0 33c idle 65c after 2h prime95
tmpin1 35c idle 42c
tmpin2 28c idle 57c
intel celeron e3200 upgraded to q6600 no OC 24~30 idle, 45~58c 2h prime95
4gb ddr2 800mhz ram
intel gma x4500
320 gb hdd 5400 rmp 27~30c idle 43c 2h prime95
250w psu
ps: i know the ram is not much but next week i will buy another 4gb