It indicates a high hot spot, so you likely need a redo on the thermal paste. That's the reason why it's revving up and down, trying to throttle and maintain frequency at the same time.
Couldn't find a post which matched my configuration but thought it worth sharing my experience. My setup pre graphics card swap: Aurora R7, GTX1080, i7 8700k, 16Gb kingston fury, 850W psu. I recently picked up a second R7 with an RTX2070 in it, so decided to swap the video cards around, knowing that overall I was not expecting big changes between the two cards, and I was right, the difference appears to be marginal for the games I am running. All was going well until I fired up the first game, then the problems began. After a short while the fan on the RTX2070 began revving up to 100% the back down again repeatedly. Given it's a blower card this was rather loud. Not ideal as the machine is right next to me, so did some digging. It seems these cards are prone to this sort of behaviour, there is clearly a fail safe on this RTX2070 which kicks in when the GPU hits 70 degrees C. (Alienware Command Center is also reporting the GPU fan at 0% even though I know for certain it is running, I have discarded any hope of AWCC being of any help whatsoever in this use case) After several days trawling the web there appear to be four solutions. 1. RMA, not an option for me as the card is well outside of warranty. 2. Replace the thermal paste on the GPU. 3. Use third party software to apply custom fan curve. 4. Use DDU to uninstall the graphics drivers under safe mode then install the graphics drivers again. I went with option 3 as it was the least intrusive. I used HWmonitor to check on all of system temps and MSI afterburner to apply the custom fan profile to the RTX2070. After much tweaking I was able to stop the fan revving but may have sacrificed a little bit of performance from the GPU in the process, given the noise at 100% (5000rpm), I think this is worth it for the time being until I resort to option 2. Here are some screen shots of the profile I have running in MSI afterburner. Note the power limit capped at 90%, this was what ultimately stopped the fan revving. The curve might help a little more but I have seen posts relating the RTX2080 where people have experienced the same issue and only applied the power limit and no curve. For me, the issue for the time being is solved. If anyone has a better solution I would gladly listen, else I hope this helps someone in their frustration. [IMAGE][IMAGE]
Aurora R7, RTX 2070 fan revving