Ichill gtx 980 hangs on native frequencies

Hello, actually card in play at a load cut down a computer the screen is either white or red. When I'm at home frequencies trying to get rid of it in furmarke the frequency is reset to 600 MHz. If I lower the frequency on the core and memory to 200MHz then the games work fine but Furmark continues to drop. I note that there is No overheating, as the maximum temperature was not sacana above 56 degrees. Overclocking I have not dabbled in .
Processor without overclocking FX8350
The PSU is chieftec 750W