You should definitely not go with a too cheap PSU just to save a few bucks. If your PSU craps out, your whole system will be at risk. You should go with a well known, sturdy brand. Those no brand, cheap PSU’s will bring you nothing but trouble. Remember the quote: “I am not rich enough to buy shitty products.”
This is true, go with known brands to avoid further issues. I have been using gigabyte and sea sonic since then, currently I am mining with different cards both red and green mixed and no problems regardless PSU issues. For proc, intel celeron will do the job, I am using it also with an asrock BTC pro 13 slots, 8 gb ram installed and no problems at all.