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dual monitor issues with gtx 560 Ti

Last response: in Graphics & Displays
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May 14, 2014 12:01:54 PM

Hi guys - thanks in advance for any advice. Let me outline the problem.

I recently got a second monitor for my desktop computer, but when I try to use it there is noticeable stuttering on it (eg when watching a movie in VLC, or even when dragging windows around I can see it a bit). The graphics card is a gtx 560 Ti and the OS is win7 64 bit, and all drivers are up to date. The original monitor, monitor #1, is plugged in using HDMI and the new one, #2, uses DVI.

I know it's not the monitor's fault, because if I make the new one the 'primary' one and the old one the 'secondary' one then the stuttering happens on the old one. So it looks like it happens on whichever monitor is secondary. I've also tried different cables.

If I disable Aero, then the stuttering goes away, but then I get screen tearing - which I gather is the result of disabling Aero. Also, I can keep Aero on and change one monitor to 59hz (and keep the other one at 60hz) and then it works, but this increases the load on the graphics card. The core clock goes up from 405mhz to 823mhz, and the memory clock from 162mhz to 1002mhz. So I'm not sure if this is 'healthy' for the graphics card?

Any advice would be appreciated!
May 14, 2014 12:20:46 PM

AFAIK You SHOULD see an increased load on the card with a second monitor plugged in. Otherwise the output is going to suffer. It's like expecting your car to go faster after setting the cruise control. You gotta step on the gas to get more speed.
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May 17, 2014 6:14:11 AM

Zooshooter said:
AFAIK You SHOULD see an increased load on the card with a second monitor plugged in. Otherwise the output is going to suffer. It's like expecting your car to go faster after setting the cruise control. You gotta step on the gas to get more speed.


Thanks for the reply Zooshooter. I guess I'm fine with the increased load in itself, but I don't understand why it only increases after I set the monitors to different frequencies (60hz and 59hz). Whereas when they're both on 60hz there is no increase (but then I get stuttering).
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June 20, 2014 8:49:50 PM

Hey there, I actually have the same problem as you about the load. I dont have any tearing or stuttering but my card runs always at full clock speed, with 0% load on the gpu. Could it be a 560 ti defect or its like that for everyone else?
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