Is it possible to overclock MSI GTX 1070 ARMOR 8G (Non OC version)

Solution
The heat generates from the GPU Chips, so the problem isn't on the case or the cpu cooler at all. Thats why the OC edition usually have better fans than the normal edition.
It's Possible, but OC version has more stable clock, even it's overclocked out of the box. You can Overclock the non-OC version, on all modern gpus though, but it might turns out to make your gpu unstable. Overclocking 1070 might be worth if you can handle the heat and control the voltage from the standard clocked version of 1070. Advise, try using msi Afterburner or something better for Overclocking like an EVGA software.
 


i don't use any water cooling for my build. I just have a cooler master evo. So in case i overclock Armor 8G will that be enough to handle the heat? I have 3 other case fans that came with my case (Fractal Node 804).
 
Yes, it has the same fan configuration. but Out of the Box Overclocking gives better tuning by default, so the heat won't be as high as your own Overclock settings because it has been tuned by the factory. The OC configuration runs by default on GPU bios for OC version, it will include Clock Tuning, memory tuning, Voltage tuning, and many other settings incl. fan default speed.