Questions about HD4870 and CCC

[MouthBoy]

Hey Guys and Girls

I have a HD4870 512MB and I am using the 10.3 catalysts. Under the ATI Overdrive menu on the CCC, it has options for the overdrive but all is greyed out. How would I go about making these options not greyed out?

Am I right in saying that the overdrive automatically overclocks my GPU or is it similar to speedstep where it clocks down when not being used as much? How do I know when it will activate?

Lastly, my GPU temp shows as 77c idle. Is that normal? Fan says its at 23%. I know that at 100% it would probably be very loud, but are any of these values changable?

Overall, I am looking to overclock my GPU to get some more performance out of it but I want to know the facts about my GPU setup first.

Thanks

 

[asoxedri]

click the lock at the top left, it will unlock it for you.
These cards are designed to run quite hot but i would not recommend overclocking it, if it idles at 77 mate.

 

[MouthBoy]

But that is with the fan not even a 1/4 or full speed...

I read that they do get hot but the fan always kicks in when it needs too.

 

[MouthBoy]

God that fan is noisy! Just whacked it upto 100% and temps dropped into the 40s but couldnt hear over it. I think I will leave that on auto

 

[Legionaire68]

I would not try to use Catalyst to overclock, I tried that on a brand new HD 5850 and according to Overdrive it was good to run at amazing clocks but the first time I played any game I started getting artifacts all over even when I returned to factory settings. I had to RMA it back to the retailer after 2 days, doh! Use Rivatuner or theres MSI afterburner if it works on your card. I used to use EVGA precision for nVidia cards too.