[azninvzn]

I have a HIS Hightech H487FN512P Radeon HD 4870 512MB 256-bit GDDR5 PCI Express 2.0 x16 HDCP Ready CrossFire Supported Video Card and while fooling around with the clock settings to try to reduce fan noise, I turned the core clock to 500 mhz. ( the lowest that CCC lets you go) I wanted to turn the clock back up because i was noticing an affect on the frame rates while veiwing hd videos on youtube. when i change the clock settings only the memory clock changes, but when i hit test custom clocks it changes the core clock while it is testing but changes it back when i accept.

 

[azninvzn]

The temps are idling at about 50 and are about 60 under load. In the breif time while it is testing and it turns the clock speed up the idel is 55-57 and load is like 64

 

[emosun]

Try a reinstall of CCC.