Greetings. What is the intended use of the PC and your overall budget?
That budget is quite low for any sort of gaming, you are missing a copy of Windows from your parts list and if you do not have a monitor, etc. you would need those items. I would recommend around $900-1000 at least for a gaming PC.
I see, in that case, then the parts you have picked out look good at that price range. You may want to look into a slightly bigger hard drive as 120GB can be run through very easily.
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