Screen blinking - is it the two graphics cards?

  herc182 19:58 02 Mar 2012
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Answered

I have windows 7 64bit version with an intel graphics card (which apparently does the less demanding work) and a Nvidia 3gb card for more graphic intensive stuff).

I am not sure if THAT is why, but the screen blinks sometimes. Off and on it seems. It happened when on google chrome whilst on a few websites.

The other thing I was wondering was if it was bitdefender. Again, not sure!

any ideas?

I have a dell laptop XPS if that helps

thanks

  herc182 22:03 02 Mar 2012

Hmmm - could it have been the intel card set to "maximise battery performance" when working on the battery? I just set it to "balance" (or even "max performance" and the screen stopped blinking....

odd

  retep888™ 01:51 03 Mar 2012

I have windows 7 64bit version with an intel graphics card (which apparently does the less demanding work) and a Nvidia 3gb card for more graphic intensive stuff).

I have a dell laptop XPS if that helps

Can you explain a bit more about these Cards on your laptop? The Intel graphic has to be an integrated onboard but what's the Nvidia 3GB ?

  herc182 16:04 03 Mar 2012

Sorry I have two cards to provide graphics. An intel one seems to deal with less taxing graphics (2D) and the Nvidia is the dedicated graphics card for 3D work.

  KRONOS the First 16:54 03 Mar 2012

Which XPS have you?

  herc182 21:52 03 Mar 2012
  markd71 23:29 03 Mar 2012

Nothing in that spec mentions 2 graphic cards, and it wouldn't make any sense to do so. Your problem lies somewhere else !

  retep888™ 00:02 04 Mar 2012

Ah, I see what you mean. Your laptop supports automatic graphic switching but whether it was the cause of your problem then I don't know ,sorry.

If your laptop is still under warranty then why not give the Dell support a call, they're very good.

  KRONOS the First 10:13 04 Mar 2012
Answer

What you have is a CPU with an integrated graphics unit plus a GT 555M graphics card. which in effect means that less graphic intensive tasks are handled by the CPU and gaming etc would be handled by the GT 555M, this is what I believe anyway, Dell,as usual do not give much detail on the components usedin their PC.s. As to whether you have a problem with the switching, I have no idea.

  frybluff 14:32 04 Mar 2012

The system uses (or is meant to) "Optimus" to decide whether a graphics task can be handled by the "onboard graphics", or if the power of the dedicated graphics card is needed.

I confess I don't know exactly HOW it does that, but, as "battery modes" tend to throttle back on graphics, to conserve power, I tend to suspect there may be a clash, when you are running in battery mode.

Whether you can adjust anything, to prevent this, I wouldn't know, but Dell support are very good, and will advise you.

  herc182 08:34 05 Mar 2012

just to confirm it was definitely the issue i noted above because the flickering has stopped completely. Basically having the graphics (onboard) set to "max battery" seems to conflict with the battery operations anyway. Have set it to balanced and there have been not further issues

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