best gpu or athlon 5350

Likely a bad PSU... This is a good option:

PCPartPicker part list / Price breakdown by merchant

Video Card: PNY GeForce GT 730 1GB Video Card ($70.56 @ Mwave)
Total: $70.56
Prices include shipping, taxes, and discounts when available

According Don Woligroski:

"The GeForce GT 730 GDDR5 64-bit, on the other hand, is a lot more interesting at $76. Despite its narrow 64-bit interface, GDDR5 memory technology facilitates more memory bandwidth than a GeForce GT 640 with DDR3 on a 128-bit connection. We don't have one in the lab yet, but it should be quite a bit faster than the Radeon R7 240. Thus, the GeForce GT 730 64-bit GDDR5 becomes our new entry-level gaming recommendation. We haven't seen a serious sub-$100 contender from Nvidia in a while, so we're glad to see the company taking gamers on a budget seriously."

Ref. http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107.html
 

DarkspineJumer

Reputable
Jan 18, 2016
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Hi, I'm sorry for a late and short response, but I think if you are on more of a budget, a GT 730 2GB DDR3 or a R7 250 1GB GDDR5 or R7 250 2GB DDR3 would be a good choice, and if you don't really care about money and want the best performance without a bottleneck would probably be R7 250X 2GB DDR3 or GT 740 2/4 GB GDDR5. Anyways, I hoped I helped and have a good day!