Hardware acceleration in Firefox 4 fluctuates my gpu clock speed and for some period of browsing will hang the gpu at the highest clock speed available even after closing Firefox 4.
After browsing heavily in Firefox 4 for some time, my gpu (ATI 5870 with the latest drivers) will stay clocked at the highest clock speed of 850Mhz and memory clock speed of 1200Mhz. Even after closing Firefox 4, the gpu will not down-clock and stay at those highest speed. I've tested the same browsing pattern on IE9 and in which this problem didn't exist so I don't think it's a driver issue. I now have to browse with hardware acceleration turned off to ensure I don't get this problem.
After browsing heavily in Firefox 4 for some time, my gpu (ATI 5870 with the latest drivers) will stay clocked at the highest clock speed of 850Mhz and memory clock speed of 1200Mhz. Even after closing Firefox 4, the gpu will not down-clock and stay at those highest speed. I've tested the same browsing pattern on IE9 and in which this problem didn't exist so I don't think it's a driver issue. I now have to browse with hardware acceleration turned off to ensure I don't get this problem.