Poor Nvidia GeForce 7800 performance with dual monitor setup
 

I just purchased a Asus branded Nvidia GeForce 7800 GTX. I have a dual
monitor configuration, something I've had with several video cards now
(GeForce FX 5800 and ATI X800, and now the 7800 GTX).

The problem is with the 7800 GTX whenver I have the second monitor
enabled (not dual screen, but I extended my desktop to the second
monitor). The problem is I get very slow performance.

For example I installed the new demos's for the 7800 (Mad Mod Mike,
etc...) And the thing plays like a slideshow.

If I disable the second monitor, it plays fine.

What the heck is going on? I never had this problem with either the FX
5800 or the ATI 800 when I played demos, games, etc... that were
available for those video cards.

I have the latest drivers installed (released Sep 2, 2005) Version
78.01

Any body have any ideas? This really is annoying because I purchased
this $600 card for gaming, but I always had the second monitor
configuration which I use in regular Windows desktop applications. In
the past, the second monitor just displays my desktop background while
I am gaming (or playing these demos), but if performance is this poor,
then I will have to disable the second monitor every time I want to
load a game, and that is silly.


- George

On 29 Sep 2005 21:48:51 -0700, George wrote:

I just purchased a Asus branded Nvidia GeForce 7800 GTX. I have a dual
monitor configuration, something I've had with several video cards now
(GeForce FX 5800 and ATI X800, and now the 7800 GTX).

The problem is with the 7800 GTX whenver I have the second monitor
enabled (not dual screen, but I extended my desktop to the second
monitor). The problem is I get very slow performance.

For example I installed the new demos's for the 7800 (Mad Mod Mike,
etc...) And the thing plays like a slideshow.

If I disable the second monitor, it plays fine.

What the heck is going on? I never had this problem with either the FX
5800 or the ATI 800 when I played demos, games, etc... that were
available for those video cards.

I have the latest drivers installed (released Sep 2, 2005) Version
78.01

Any body have any ideas? This really is annoying because I purchased
this $600 card for gaming, but I always had the second monitor
configuration which I use in regular Windows desktop applications. In
the past, the second monitor just displays my desktop background while
I am gaming (or playing these demos), but if performance is this poor,
then I will have to disable the second monitor every time I want to
load a game, and that is silly.


- George

Try other drivers, that's the only way !

Well, thats always a good thing to do, but what I am curious to know is
if this is some known problem with 7800 cards or something. Again, I
did not have this problem with an Asus branded Nvidia GeForce FX 5800
or an ATI Radeon X800 Pro (both AGP) cards... And both of them i've
went thru several driver variations during their time as my primary
video card.

Now that I go to the 7800 GTX card (this is a PCI Express card), I am
having this problem. Kind of strange that a card this powerful would
have this silly problem, especially when the second monitor is not
doing anything (but displaying my blue background) when the primary is
playing a game or showing an NVidia demo..

But I will try some older drivers just to make sure!

On 30 Sep 2005 14:44:12 -0700, George wrote:

Well, thats always a good thing to do, but what I am curious to know is
if this is some known problem with 7800 cards or something. Again, I
did not have this problem with an Asus branded Nvidia GeForce FX 5800
or an ATI Radeon X800 Pro (both AGP) cards... And both of them i've
went thru several driver variations during their time as my primary
video card.

Now that I go to the 7800 GTX card (this is a PCI Express card), I am
having this problem. Kind of strange that a card this powerful would
have this silly problem, especially when the second monitor is not
doing anything (but displaying my blue background) when the primary is
playing a game or showing an NVidia demo..

But I will try some older drivers just to make sure!

As you said those cards are powerfull enough to display picture on 4
monitors and do all kind of stuff in the same time on them and not to
sttuter a bit, so there must be problem in drivers or in your windows
instalation, but i think it's the drivers. So try some newer ones, you have
betas on www.guru3d.com, there's nothing you can lose if you try !

Try setting the monitor mode to DualView. I think this mode has the best
dual monitor acceleration support.


"George" wrote in message
oups.com...
I just purchased a Asus branded Nvidia GeForce 7800 GTX. I have a dual
monitor configuration, something I've had with several video cards now
(GeForce FX 5800 and ATI X800, and now the 7800 GTX).

The problem is with the 7800 GTX whenver I have the second monitor
enabled (not dual screen, but I extended my desktop to the second
monitor). The problem is I get very slow performance.

For example I installed the new demos's for the 7800 (Mad Mod Mike,
etc...) And the thing plays like a slideshow.

If I disable the second monitor, it plays fine.

What the heck is going on? I never had this problem with either the FX
5800 or the ATI 800 when I played demos, games, etc... that were
available for those video cards.

I have the latest drivers installed (released Sep 2, 2005) Version
78.01

Any body have any ideas? This really is annoying because I purchased
this $600 card for gaming, but I always had the second monitor
configuration which I use in regular Windows desktop applications. In
the past, the second monitor just displays my desktop background while
I am gaming (or playing these demos), but if performance is this poor,
then I will have to disable the second monitor every time I want to
load a game, and that is silly.


- George