I have multiple suggestions:
1. Switch to a CM Hyper 212 EVO unless you are overclocking it by a lot.
2. Use 2x4Gb of DDR3-1866MHz CAS 9 for much better performance (Dual-channel RAM is much faster than a single stick)
3. Use a GTX 760/660Ti instead. Cheaper and better performing/temperature.
4. Get a Corsair TX 650V2. When power supplies fail (low quality PSU's are highly likely to), they will break other components. So don't skimp.