Performance Test have supported Dual-Displays Benchmark?

[redZeng]

I need to know Dual-Display performance benchmark in different devices.
Include Clone-Mode and Extended-Mode, if the PT can execute on two monitors in same time?
How do I compare these benchmark result?

Thank you!

[David (PassMark)]

What exactly are you trying to measure?
For most applications dual display will have zero impact on the performance.

[redZeng]

I want to know that if different graphic cards in high resolution(Extended-Mode) have performance difference.
Maybe graphic card need more resources, like as memory, CPU, ...etc. in Extended-Mode.


Thank you!

[David (PassMark)]

Slightly more video RAM is required, but the figure is way below what typical video cards now have access to. You can calculate the requirements with a calculator (about 10MB per screen).

Most 3D games don't support multi-monitors.

So that only leaves 2D?

[redZeng]

Applications are only in 2D.

Thanks for you reply.

[David (PassMark)]

The time it takes to render a 2D scene is proportional to the number of pixels being rendered. So 2 screens should be no different from 1 large screen. It is the number of pixels that is more important than the number of screens.

Even then typically screen updates only occur on 1 screen at a time. For example you wouldn't normally have a browser window spread across multiple displays.