Suggest graphic card for my psu

Hi everyone my system configuration is

Intel pentium dual core 1.8GHz
pi945GCM mercury motherboard
400W power supply
2GB Ram
256 B hard disk
intel integrated graphics card 128Mb
Max screen resolution 1400*900



PSU Model: LWT 2505 400W A 2.03


AC INPUT
115V 6A 50/60Hz
240V 3A 50/60Hz

DC OUTPUT
+3.3V
+5V
+12V
+12V
-5V
-12V
+5V/SB


16A
30A
14A
0.5A
0.5A
-
2.0A
400W MAX

Please suggest a decent graphic card(medium settings) without upgrading mu psu and also comment on my present psu is it capable of handling graphic card?