Benchmarks: Temps
Nothing to worry about here.
We did have reservations on the stock cooler when first perusing the Nanu Gamer's specifications. Sandwiched between motherboard and PSU, without much space to work with, the reference heatsink struggles to keep temperatures in check. Perhaps something like the Noctua NH-L9i would be a better bet?
EVGA's ACX cooler makes short work of cooling the underlying GTX 760 GPU.