5870 fan auto increasing speed in short bursts at 90c~

[mysticode]

At around the 90c~ mark, the fan on my 5870 will do quick bursts to get to around 50% speed. Before then, it was running at around 40%. Regardless of percentage, it does this, will do quick bursts raising the speed up another 10% for half a sec increments, over and over, until temps go below 90c again.

Any idea why this might be happening?


Thanks!

[mysticode]

Bump, this is happening at 50c as well. Pretty much it thinks it needs more fan, but only does it in bursts. So weird.

[AvalonMiner]

You should get MSI afterburner and turn the fan up manually to 100%, AMD cards arent recommended to be run any hotter than 85c for long periods of time.

[mysticode]

I have done exactly that

However I am really perplexed to why this fan is going nuts like it is.