Linked by Thom Holwerda on Mon 13th Aug 2007 15:38 UTC, submitted by anonymous
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Bear in mind that with two monitors, you're quadrupling the number of pixels. The memory consumption is going to sky rocket, and the GPU has so much more processing to do.
On an AGP geforce 6200 (with 256 megs of ram), performance gets pretty slow when I enable twinview on two 1280x1024 monitors. If I drop each of them to 1024x768, things are much better.
On a PCIe geforce 7900 (256 megs of ram), I can't feel a difference between one 1280x1024 monitor and two 1280x1024 monitors.
Both machines have two gigs of RAM with dual Xeons (actually, one is dual core, the other has two Xeons).
Adam




Member since:
2007-08-14
Just out of interest, what's your performance with twinview? I have an xp2600 with 2G of ram (gentoo, using the cvs/git version of compiz fusion) where the performance is fine with one monitor (1680x1050), but the second I enable the second monitor (same res) the FPS drops and it feels like software rendinger all of a sudden. This is admittadly an older nvidia 4200 video card (256mb I think, both monitors using VGA connectors).
I don't think it's the video card because the performance is fine with one monitor. If you have fine performance with two monitors please post specs, OS, versions, etc.