Line Graph of peak temperatures of V340 dual GPUs (with Wathai 5000rpm fan)
0I just decided to find out what is the temperature of my V340 GPUs at different PWM modes of the Wathai 5000rpm fan (47dB loud fan). GPU 1 is the GPU closest to the fan (AKA the second one on the card logically actually) while GPU 2 is the one further away. And as you probably know, at 30% it doesn't "count" as both GPU's RAM managed to overheat and test stopped.
Turns out that heat dissipation/airflow isn't linear either huh?
GPU 1 at 102W / Peak Junction Temperatures / One at a time
100% PWM = 55C
90% PWM = 55C
80% PWM = 57C
70% PWM = 60C
60% PWM = 63C
50% PWM = 68C
40% PWM = 84C
30% PWM = (RED RAM OVERHEATED) (97C)
GPU 2 at 102W / Peak Junction Temperatures / One at a time
100% PWM = 68C
90% PWM = 68C
80% PWM = 70C
70% PWM = 73C
60% PWM = 75C
50% PWM = 80C
40% PWM = 87C
30% PWM = RAM Overheat likely (95C)
Note : Due to a Microchip Switch Bug, or maybe the switch itself overheats, running both GPUs at once cannot be sustained.