DWM. Tips of memory EXE, resulting in aero being disabled, when you use a window on a driving instructor by a secondary graphics card

(I was going to the origin of this post in response to this topic, but it seems to be dead and, possibly, a different question.)  ( This thread is probably the same problem and has some information, but is old and sidetracked.)

I used to run two s AMD Radeon 6970 in CrossfireX, 3 driving instructors from the main videocard, without any problem.  I decided to take two cards off CrossfireX and run them independently, with two monitors driven by the second video card.  Now, whenever a window on a monitor driven by the second video card does a lot of update - like scrolling a page of MS Answers in IE or FireFox - I see not the use of the memory of dwm.exe rocket up to approximately 2 GB (it takes about 3 seconds) before Windows turns off Aero and returns to the Windows 7 Basic color palette.  This does not repro on the instructor by the first video card (memory dwm.exe use remains stable, Aero is not disabled).  I've been hunting the internet for everything and time now looking for an answer, nothing has worked, but I found a lot of posts on the same problem.

Other information that might be useful, based on what I saw:

  • All my drivers are up to date
  • All BIOS are up-to-date
  • DWM.exe is the only process that stings
  • I can re-enable Aero by him switch back to an Aero theme, and the problem with reproducing again
  • Scrolling or watch that video in IE or FireFox YouTube reproduces the problem constantly, but I can repro by continually moving a FireFox window, so it seems linked purely how drawing is done, the speed and how permanently.  I have same repro when scrolling in this text of entry for this message box.
  • If I stop the scroll/movement/whatever before DWM. EXE hits 2 GB, the drops of memory use down to normal (around 90 MB).
  • I Live Mesh, but I killed it and the repros still problem.  I also tried to disable the Windows Live display driver, but it did not help.
  • I tried to delete the DirectX under HKLM\Software\Microsoft key, which did not help.
  • Nothing is written to the system event log when this happens

To summarize:
DWM.exe uncontrolled spike memory when a large number of drawing happens on a monitor driven by a secondary graphics card, with resulting Aero is disabled.

System Specs:
OS: Windows 7 SP1 Professional, completely up-to-date (clean install - not upgraded to Vista)
Processor: Intel core i7 2600 K 3.4 GHz (stock speed)
Memory: 16 GB DDR3 1866 MHz
Motherboard: Gigabyte P67a-ud7-b3
Video: 2 x AMD Radeon 6970 2 GB (only the repros when you don't the crossfirex) (both cards must be running at the speed 8 x PCI-E in this configuration on this mobo, have not verified)
Monitors: 3 x HP ZR24w @ 1920 x 1200 60 Hz color 32 bit depth (horizontal, Center monitor is primary & driven by the first video card, others by second video card)
Hard drives: Crucial realSSD C300 256 GB, Western Digital WD5000AAKS SATA2 500 GB SATA3

More information available on request.

If anyone knows a workaround for this problem solution please let me know.  I'll post any solution that I ended up going with.

Thank you!

Hi Fabio,.

This sound like a problem specific to AMD and you may need to contact them for specific support for this problem.

See the following link for the support of AMD.

http://support.AMD.com/us/contacts/pages/GraphicsTechnicalSupport.aspx

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