Good 450$ gaming pc

I summon you experts to give a good gaming pc for 450$. I do not need an is or a monitor. I do however need a case. Thank you in advance.

With OS:

Without OS:

I'm close... $35 over budget... but it'd be a decent gaming PC

I opt to go with the 4gb since it's easier to upgrade the ram than the gpu. Edited.

Something like this might be good: