Noob question

[On Holiday]

If I am running dual screens (cloned, both screens displaying same thing), would this increase GPU usage/temperature compared to just running one screen?

 

[Tonester0011]

Yes.

 

[Five.Stars]

Not on my 7970. Duplicate retains 300mhz core, 150mhz memory at 0.85V.

 

[evohicks]

On my setup, if I enable extended desktop to 2 screens my card temp rises by around 4 -5° so yes it will increase usage.

 

[Five.Stars]

The op is asking whethere duplicate will increase temps, which I know for a fact don't (certainly with amd 79 series), as the voltage and clocks remain the same as with a single screen.

Extended does increase temps due to the memory clocks increasing to full 3d clocks with the core increasing (in my case from 300mhz - 500mhz) with the voltage increasing from 0.85V to 1.112V to support the increased clocks, thus increased temperatures.

 

[Tonester0011]

 

[Five.Stars]

Hmmm that is odd. Are both your monitors displaying the same res at the same frequency?

Mines are both 1920x1080 @60hz. Screen 1 is connected via DVI with screen 2 connected via HDMI.

Seems it MAY increase your temps op, although I can assure you in my case it doesn't and retains 2d idle clocks with duplicate. Will post screenies tomorrow as not at home just now and posting from phone.

 

[Tonester0011]

1 screen 120hz the other is a TV @60hz, in dup they both default to 1080 @60hz however and still retain the higher memory and core clocks.