34-ish degrees Celsius on idle for a 8350 with entry level aftermarket cooler is normal.
the CM hyper evo 212 is highly praised in this forum for its price-to-performance results, not for being great.
but a non-OC'd cpu, the main concern is air flow.
if you can, put a 120mm fan as exhaust on the top of the chassis and a 120mm fan as intake in the side panel.
the 3 intake fans in the front will have little effects on cooling the motherboard's VRM to prevent thermal throttling,
the fan on the top of the chassis will also dissipate the heat absorbed and released by the cpu cooler, because warm air rises upwards.
also use the chassis fan connectors on the motherboard for the 3 intake fans in front, so that you can control the speed thru the bios to minimize the noise.
next, i strongly suggest you replace the power supply because of safety and for stability.
look for your power supply here:
http://www.tomshardware.com/answers/id-1804779/power-supply-unit-tier-list.html
it will generate fluctuations in the voltage/current supplied to the components and further decrease their lifespan.
OC is achieved by over-volting or under-volting the CPU, so imagine your the 8350 going to a power cycle every millisecond.