GTX680 SLI - Afterburner overclock not activating

[1kiwi]

HI Experts,

Installed a second 680 last night, activated the performance setting for SLI however I'm not seeing the clock speed being recognised in afterburner or GPU-Z. It's been a while since I have used SLI, any thoughts?

 

[Drangueos]

Try to reinstall the Afterburner (remove it 1st)
do you have any other OC software installed?

 

[1kiwi]

Try to reinstall the Afterburner (remove it 1st)
do you have any other OC software installed?

I re-installed the latest stable (was using beta before). However I'm not sure its afterburner as GPU-Z is showing the correct boost clocks.

The issue is, the cards are not boosting at all. The brands of the cards are: MSI (was previously boosting by itself) and Gigabyte (recently installed). The last time I had SLI (GTX480s) I seem to remember that this was pretty straight forward.

 

[Gripen90]

Is it the Shader Clock you're thinking about ?. The Shader clock on the Kepler series unlike the older Fermi series are linked directly to the GPU core clock (I think it's like that), that's why you don't see that option.

The latest after burner software is Version 2.3.1
http://event.msi.com/vga/afterburner/download.htm

Try running Unigine Heaven 4.0 benchmark and have MSI OSD enabled. There you should see the boost clock working on both cards.

 

[RetrogamerX]

Try running Unigine Heaven 4.0 benchmark and have MSI OSD enabled. There you should see the boost clock working on both cards.

This^^^

 

[1kiwi]

Thanks guys. I uninstalled afterburner, nvidia drivers and then reinstalled everything and it seems to be working now.

Not really sure what the issue was.

 

[Drangueos]

Probably was the Afterburner, It happened something like that when I replaced my 2 reference 7950s for 2 msi tf3 7950s boost edition.

 

[1kiwi]

Very weird.

Another question for you guys....

I'm gaming at 1920x1080 @ 120Hz. I've found that regardless of whether I use the performance setting in the nvidia control panel, I don't get the boost clock unless I disable vsync and use ultra settings.

What I'm aiming for is to minimize any drops in FPS with vsync. When running vsync by clocks remain at 1006 and I still get drops in FPS, down to 80/90 which is noticeable on a 120Hz monitor.

Is there a way to force a higher clock to raise my min frames?