Annoying Blinking problem
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[quote name='half.fried' post='1003218' date='Feb 17 2010, 03:04 PM']I just got the 3D Vision bundle with the Samsung monitor a couple of days ago, and immediately started getting very bad flashing, stereo inversion, automatic stereo disabling and other bad things. In the setup wizard, at the step where you close one eye then the other, with just one eye open the visible shape would fade from the green square to the blue triangle and back again, indicating the frequency coming from the emitter was either slower or faster than it should be.

I don't have SLI, and this was on a fresh install of Win 7 x64. I tried all the tricks listed here, but couldn't get it working.

However, I did find one thing that worked - totally disable bios-level CPU overclocking. I was overclocking my CPU from 1.86 to 3.33Ghz, and my system had been stable with this overclock in every situation for the past year, but even a fractional overclock (i.e. to 1.9Ghz) causes extremely bad flickering.

Once I'd totally disabled overclocking, the 3D vision glasses worked perfectly. In bright sunlight I'll get occasional blinking in the right eye at 120Hz, but no stereo inversion, auto-disabling or any other artifacts. Trying to overclock even a fraction would bring back all the issues.

So it's working for now, but I think Nvidia need to look at this - plenty of people overclock their CPU, and many modern motherboards have auto-overclock modes built into them. If I had to guess I'd say there was a timing loop or delay that's being calculated based entirely on the reported speed of the CPU, not the effective speed, which would be pretty easy to fix.[/quote]

You said BIOS level overclocking so I guess it doesn't apply, but I have seen overclocking and monitoring tools cause flickering. Specifically the eVGA Precision monitoring and ocing tool caused flicker for myself. I didn't have to change my clocks or anything to get rid of the flickering; just closed the program.
[quote name='half.fried' post='1003218' date='Feb 17 2010, 03:04 PM']I just got the 3D Vision bundle with the Samsung monitor a couple of days ago, and immediately started getting very bad flashing, stereo inversion, automatic stereo disabling and other bad things. In the setup wizard, at the step where you close one eye then the other, with just one eye open the visible shape would fade from the green square to the blue triangle and back again, indicating the frequency coming from the emitter was either slower or faster than it should be.



I don't have SLI, and this was on a fresh install of Win 7 x64. I tried all the tricks listed here, but couldn't get it working.



However, I did find one thing that worked - totally disable bios-level CPU overclocking. I was overclocking my CPU from 1.86 to 3.33Ghz, and my system had been stable with this overclock in every situation for the past year, but even a fractional overclock (i.e. to 1.9Ghz) causes extremely bad flickering.



Once I'd totally disabled overclocking, the 3D vision glasses worked perfectly. In bright sunlight I'll get occasional blinking in the right eye at 120Hz, but no stereo inversion, auto-disabling or any other artifacts. Trying to overclock even a fraction would bring back all the issues.



So it's working for now, but I think Nvidia need to look at this - plenty of people overclock their CPU, and many modern motherboards have auto-overclock modes built into them. If I had to guess I'd say there was a timing loop or delay that's being calculated based entirely on the reported speed of the CPU, not the effective speed, which would be pretty easy to fix.



You said BIOS level overclocking so I guess it doesn't apply, but I have seen overclocking and monitoring tools cause flickering. Specifically the eVGA Precision monitoring and ocing tool caused flicker for myself. I didn't have to change my clocks or anything to get rid of the flickering; just closed the program.

Posted 02/17/2010 10:21 PM   
[quote name='MistaP' post='1003251' date='Feb 18 2010, 11:21 AM']You said BIOS level overclocking so I guess it doesn't apply, but I have seen overclocking and monitoring tools cause flickering. Specifically the eVGA Precision monitoring and ocing tool caused flicker for myself. I didn't have to change my clocks or anything to get rid of the flickering; just closed the program.[/quote]
Yeah, I saw that. This is on a totally fresh install - nothing installed except the required drivers, no antivirus or overclocking software or anything.

You run with your CPU overclocked without flickering? That's interesting - it might be chipset or motherboard specific then. Less likely for a fix for my specific problem, but it does mean if I upgrade I might be able to overclock again.
[quote name='MistaP' post='1003251' date='Feb 18 2010, 11:21 AM']You said BIOS level overclocking so I guess it doesn't apply, but I have seen overclocking and monitoring tools cause flickering. Specifically the eVGA Precision monitoring and ocing tool caused flicker for myself. I didn't have to change my clocks or anything to get rid of the flickering; just closed the program.

Yeah, I saw that. This is on a totally fresh install - nothing installed except the required drivers, no antivirus or overclocking software or anything.



You run with your CPU overclocked without flickering? That's interesting - it might be chipset or motherboard specific then. Less likely for a fix for my specific problem, but it does mean if I upgrade I might be able to overclock again.

Posted 02/18/2010 12:09 AM   
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