Hello... I flashed a 40% idle speed Fan curve to my gtx760... it's little louder at idle, but my GPU never seems to reach 70's now, VS the 30% idle speed curve, 80's was common.
Try GPU-z and start the data logger in it to see your Fan speeds, power and temps... also post a screen shot of the GPU setting screen for us. https://www.techpowerup.com/downloads/SysInfo/GPU-Z/