My case is p182 with psu bay fan moved up to middle bay blowing across the 5870 on medium setting. Airflow should be good as i have spent time with cable management to ensure minimal clutter.
I am pretty sure it hasnt overheated, as i always monitor my pc temps. Hhighest i seen was 79 and this was stableised around this mark as the fan would kick to 32% speed and bring it down to around the 76 mark. It would then slow down, temmp would creep towards 80 again and repeat.
yeah i checked on benchies it does look like temps are stable, you can go up to about 85 degrees




It all comes down to the custom settings and use application settings tab. I thought it made sense that by checking use application settings, and unchecking use custom settings, it would mean i am not forcing anything. I was obviously wrong!