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Multi-monitor and VRAM - Need clarification

post #1 of 6
Thread Starter 
Hi there,

There something i really don't understand now.. i heard poeple say that 4GB VRAM card is more suitable for a big resolution screen and 2 or more screen.

A-What i don't understand (sorry if this seem stupid....) when you play a game your normally only play on a single monitor.. or there is something i am missing here ?

B-The fact that you have 2 monitor.. does it really decrease the game performance if you have lower VRAM value even if you play at 1080P on a single monitor ?

C-What they mean when they say multimonitor ?

D- If i am playing at 1080P with 2 monitors but only playing on one minitor i am okay with the 2GB version ? I won't change my screen any soon...

Thanks for the clarifications!
    
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post #2 of 6
http://www.amd.com/us/products/technologies/amd-eyefinity-technology/Pages/eyefinity.aspx

http://www.nvidia.com/object/3d-vision-surround-technology.html

This is the sort of thing that multimonitor is focussed on:

http://www.overclock.net/t/581981/official-ati-eyefinity-info-thread

http://www.overclock.net/t/780396/official-nvidia-surround

Unfortunately, nVidia Surround requires three monitors - you can't do it with two. Further, until the GTX600 series, you needed SLI to run Surround also. AMD EyeFinity doesn't have those limitations, but you need DisplayPort capable monitors or adaptors (which opened up something of a compatibility minefield)...

2GB of VRAM is OK for all but the most demanding resolutions and settings - I'm thinking triple 1440p here, or games with texture mods which push VRAM usage into extremes. Off a single GPU, you'll find a single GTX680 does well enough to drive 5760x1080 (triple 1080p)... although some games will need settings turned down a little.

If you game on a single monitor (and the second is disabled while in fullscreen) you will not have any significant performance impact from dual monitors.

Hope this helps. smile.gif
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post #3 of 6
Thread Starter 
Oh i see! More clear now... that more like bells and whirstle for me.

If you game on a single monitor (and the second is disabled while in fullscreen) you will not have any significant performance impact from dual monitors.

So basically it need to be disabled ? In the Nvidia panel i suppose ?

Thanks a lots for your explanation. Pretty clear smile.gif
    
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post #4 of 6
It's been some time since I used just "simple" dual monitors - I can't remember whether Windows turns the second monitor off or not when a program goes fullscreen on the primary. Even so, the VRAM usage and extremely minor impact of drawing a secondary screen pales in comparison to the work the GPU has to do to throw polygons and textures around the other screen.

That said, some games (full screen apps) do exhibit annoying quirks when run on a dual monitor system and fullscreen on one. If the cursor drifts over the boundary between screens, the game may lose focus. Depending on the game, that can be painless, or require you closing it in Task Manager and opening it again. Other games won't allow you to scroll with the mouse. The drivers have evolved a lot, so it'll be a case of 'see how it behaves, and adapt accordingly'. smile.gif
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post #5 of 6
I have a dual monitor setup and can confirm that the second monitor (which I use to monitor temps and such) consumes next to no resources while gaming. Like Paradigm has said, some games treat dual monitors differently than others. For example, when I launch Skyrim, my second monitor remains on and the game automatically displays in fullscreen on my main monitor while in Arma 3 Beta, my second monitor will shut off (go into stand by). In games where the second monitor goes to sleep mode, I just Alt-Tab and go back into the game (this usually wakes the second monitor up. I'm running a GTX Titan and 3930k, and have noticed no difference in performance when gaming with the second monitor displaying NVInspector and Steam.
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post #6 of 6
Thread Starter 
Alright thanks for your replies guys!
    
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