Arch Linux

otacon

Member

From: USA

Registered: 2008-06-29

Posts: 170

Website

how to enable SLI mode

I have two Nvidia 8800Gs cards and I can't find how you enable SLI mode, also how I check to make sure it is working. I looked at the nvidia wiki and the xorg wiki but I can't find how to do it.

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related links

no solution yet.
http://bbs.archlinux.org/viewtopic.php?id=55317

Last edited by otacon (2009-02-19 05:47:26)

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otacon

Member

From: USA

Registered: 2008-06-29

Posts: 170

Website

Re: how to enable SLI mode

Since there is a lack of response I guess either SLI is not supported in Archlinux, no one really knows how, or this is such a stupid question that no one would even respond to it.
I will look around a bit, but if I can't find anyone who has SLI working in a few days I will just have to come to the conclusion that this is not supported in Arch yet.

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Ranguvar

Member

Registered: 2008-08-12

Posts: 2,549

Re: how to enable SLI mode

Hey, calm down. It's possible your thread was just overlooked. A simple bump would suffice

Anyways, Arch has very little say over what is supported or not. If Linux supports SLI (it does, as a quick Google tells me), then Arch 99% likely will. Especially since SLI is a Big Deal(tm).

This should probably be in the Wiki for NVIDIA (you could add it), but regaurdless: when in doubt, check the official documentation.

http://us.download.nvidia.com/XFree86/L … er-25.html
http://us.download.nvidia.com/XFree86/L … dix-b.html

The graphical nvidia-settings tool also lets you enable SLI.

Cheers!

Last edited by Ranguvar (2009-02-19 05:58:13)

nowahn

Member

From: elsewhere

Registered: 2008-12-05

Posts: 75

Re: how to enable SLI mode

SLI works for me.
you can use this command :

nvidia-xconfig --sli=Auto

it will modify your current xorg.conf to set SLI.
or you can configure it by hand in xorg.conf. here is a summary of mine :

...
Section "Monitor"
   Identifier "Monitor0"
   ...
   # nothing special
EndSection

Section "Device"
   Identifier "Device0"
   Driver "nvidia"
   BusID "PCI:3:0:0"
EndSection

Section "Screen"
   Identifier "Screen0"
   Device "Device0"
   Monitor "Monitor0"
   ...
   Option "SLI" "auto"
   ...
EndSection

...

note: you have to configure only one Device. you can find the BusID by running lspci.

you can check this once started by running NVIDIA X Server Settings (it should be somewhere in your menu) :
- select X Screen 0, you should see 2 GPUs for it
- select GPU 0 or GPU 1, you should see X Screens: Screen 0 (SLI)
all this is explained at the links given by Ranguvar.

The graphical nvidia-settings tool also lets you enable SLI.

are you sure ? I can't configure this from nvidia-settings.

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iBertus

Member

From: Greenville, NC

Registered: 2004-11-04

Posts: 2,228

Re: how to enable SLI mode

The graphical tool does not allow you to enable SLI on linux.

Ranguvar

Member

Registered: 2008-08-12

Posts: 2,549

Re: how to enable SLI mode

Ah, never mind then. I don't have SLI, I just thought I remembered seing something there.

Oh, and nvidia-xconfig will generate a whole new xorg.conf, not modify your old one, IIRC.