Quote from: spicepearls on April 18, 2017, 08:50:31 AM

Quote from: szafa on April 18, 2017, 05:35:35 AM

You can try clean card from dust and replace thermal paste.Maybe this help.

Quote from: addias on April 18, 2017, 05:57:42 AM

I would not apply new thermal paste if your card is still under warranty. I am sure someone in this thread will have some better ideas.

The graphics card are newly purchased. I am not sure the undervolt setting is good! I need the undervolt setting to be set during system boot...

Some silly question, but maybe they can be useful.
How is the rig built? Open-frame?
How about the distance between GPUs?

What's the temperature in the room?

All those factors can massively impact GPUs temperatures, your software setting seem right