Graphic card

[ajay708]

will zotac gtx 560 ti oc version 1 gb will work on i3 550 3.2ghz with motherboard dh55pj 450 watt psu 4gb ddr3 ram

 

[joluk44]

yes but the more important thing is what psu do you have? and it will work but it will be held back by your i3

 

[ajay708]

i have intel 450 watt psu is it ok for 560 ti oc version

 

[joluk44]

it might be pushing it, a 500-550w psu from corsair, seasonic or ocz would be a good brand

 

[Gman450]

Even if you get a new PSU, that CPU will bottleneck a GTX560Ti slightly.
The best you could go for with that CPU, would be a HD 6850 or a GTX460.