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Dynamic SLI toggle (needed w/ instructions)

KKthebeast

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Nov 20, 2020
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This allows laptops with dual cards in SLI to toggle SLI ON and OFF without rebooting (Tested and working)

Note: 2 ways, either modify and .inf or the registry

Could have have this as a toggle in the advance section of the NVCleanInstall?


Simply open the NVDMN.INF file in Notepad and change the zero (0) to a one (1) in all of the HKR,,RmDynamicSLIAllowed,%REG_DWORD%,0 strings. Use the "Find" feature to find the first line of code, then use "Replace All" to change them all in one click. One you do that, run the driver setup. You can also open Regedit and change the all of the keys for RmDynamicSLIAllowed DWORD values from zero to one and accomplish the same thing. I don't remember how many keys there are, but there are quite a few. If you use this method, use the Regedit "Find" feature or a utility like RegCrawler to make it easier. Otherwise, you will miss some trying to find them manually browsing through the registry. You have to reboot for this to be enabled after editing the registry.


Credit: Although Mr. Fox figured out you can do this by modding the INF, he gives 100% of the credit to johnksss first for letting him know about this trick by changing the registry DWORD values from 0 to 1. He Thanks Brother John!

Link to original post by Mr. Fox
Post #22

This is for the 1080 (use for after install of drivers as of Dec 02 2020) - Must reboot after merge to see the changes
 

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  • SLI toggle fix.zip
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W1zzard

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This looks like REALLY old information from the 300 series drivers ?
 
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KKthebeast

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Nov 20, 2020
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Well, it is all 100% accurate and current as far it relating to Reboot to toggle SLI. Nvidia forgot to/didn't update a couple of configs. like the 1080 mobile. If you are talking about Mr. Fox's original find, then yes, that "issue" was probably addressed for desktop long ago but more likely not noticed as it only effects mobile 1080s. :)
 
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