Weird flicker on my PC when idle/gaming

Hi there,

First time poster, long time reader.

I'm having a really strange issue with a flickering problem that I really can't seem to figure out how to fix. I've done quite a bit, gotten a lot of opinions, but nothing seems to remedy it to the way I want it to work.

First off, here's the issue:

http://www.youtube.com/watch?v=VcFLjRHN2Fc

I took a recording of a set-up I just migrated from -- but the EXACT same issue is happening on my current setup.

What's going on -- when I either play some sort of game (it happens more frequently here) or just sit idle on my desktop - the upper left hand corner of my monitor flickers. It happens EXTREMELY fast and is a little difficult to see in the video -- I tried to pinpoint the times that they were occurring.

Setup - Two GTX 570's in SLI mode connected to two Samsung Syncmaster SA700D's via DVI. I have both monitors displaying 120hz, as they are 120hz monitors. I've used the same PSU in both setups (didn't replace) -- a 1000W PSU. I spoke to EVGA, as I thought it was some sort of defect. They have no idea what it is (they told me to just put them at 60hz .. they didn't see the big deal).

Currently, my setup now consists of 3 Samsung Syncmaster SA700D's connected via DVI to a GTX 690 running in "Active all displays" mode (I plan to run in SLI soon -- I need a displayport -> DVI connector, as the 690 won't use all three DVI ports in SLI mode).

What I've done -- I've re-installed my OS with quite a few different driver versions, I've turned Vsync on and off in many gaming applications that I use, I've swapped out the DVI cables, switched out the SLI bridge.

Workarounds (yet not acceptable) -- With my old setup of two monitors and the SLI GTX 570, if I plugged one monitor in with HDMI (60hz) and the other with DVI (120hz), the issue went away completely. I haven't found a workaround for my new setup of three monitors with the GTX 690, but I would like all of them to display in 120hz and not have to kick them down to 60hz.

Any help on this would be GREATLY appreciated. If you're confused by my explanation, please ask questions.



Don't...

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http://www.tomshardware.com/forum/283384-33-read-first