I built this machine mainly as a gaming setup, but also wanted the ability to multitask easily and without any problems. So far (after 1 month's use [as of 07/05/13]) absolutely no problems. Possibly looking to upgrade my CPU cooler in the future however, as overclocking may become an option. The only slight problem that I had when building this PC was the fact that some of the fans included with the case had cables that could not be easily moved, which called for a little custom cable management.
For Reference; GTX 650 Ti is in the first PCI-E slot, GTS 8800 is in the second