If you put 2 fans on the front of your case pulling cool air in, and one fan at the rear of the case to pull warm air out, your system will stay sufficiently cool to not have problems with heat. This assumes that the CPU cooler and GPU fans are working, and setup to increase the speed of the CPU/GPU fan(s) when the temps start climbing. I used Noctua fans for my case, and for the 212 Hyper Evo CPU cooler as well due to the fact they are very quiet and extremely reliable fans. They come with 6 year warranties, and are rated for 150,000 hours of use (17.1 years). Most of their fans are tan/brown, but they do have what they call industrial fans now that are black, which is what I bought and used with my system.
I setup my system using MSI Afterburner to have my GPU fan curve set like this:
40% at 45°C
50% at 60°C
65% at 70°C
70% at 75°C
80% at 80°C
100% at 85°C
That will keep your GPU reasonable cool as long as it is not severely overclocked and everything is working properly. You also need to click the checkbox to allow MSI Afterburner to control the GPU fans.