So whats this about, overclock makes screen brighter?

[jimmyboy2008]

I noticed that my screen was slightly brighter than usual going by the "barely visable" brightnes settings on the options on source games, I had my 7950gx2 overclocked slightly. When I returned to windows I opened ati tool and reseted back to the stock speeds and the screen went a lot darker (back to normal) the second I changed the speeds.

Is this normal? whats the reason for this, Im not massiveily worried as its not a huge change in brigthness but certainly noticable.

any ideas?

cheers

 

[ots3go]

I don't see how changing card clocks can alter brightness at all.

I'd be looking for other things that could be causing this.

 

[willhub]

Maybe its Digital Vibrance setting doing it?

 

[jimmyboy2008]

I know its weird but as soon as I loaded default speeds for my card the screen just changed. Its no big deal i just wanted to know if overclcoking does this, Ive been doing this for years and first time Ive noticed.

 

[Alexrose1uk]

Have to admit its the first time I've heard of an overclock changing screen brightness, I suppose theoretically if your card has bad voltage control it could be increasing the output voltage slightly when you overclock it, and thus your screen is percieving a brighter picture, but not sure.