Not an expert by any means so take my word with a grain of salt.
The spec sheet you listed there doesn't have any specifications on the power supply, but my guess is because it was a pre-built , the PSU you have in there probably isn't great. 350w is probably pushing it after putting in a RX 570 and you might want to consider swapping it out for at least a 450w 80+ rated unit just to give yourself some headroom, especially if the current unit in there is some unrated no name death box.
Yeah i dont know about that man. I get it if your on a budget but the power supply is one thing you really shouldn't cheap out on. You're better off putting your money towards a reputable PSU, like the one DSzymborski listed above.