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Do the cards in an SLI setup have to match exactly?

Last response: in Graphics & Displays
April 17, 2007 4:39:39 PM

I have a Dell XPS410 with a 7900GS, 256 mb video card. I'd like to add a second card and do an SLI setup. Does the second card have to match the first one, or could I use, for example, a 7900GTX 512 mb card?

Would both cards revert to the lower performance of the lesser card, or what?


More about : cards sli setup match

April 17, 2007 5:06:56 PM

I think you can only do that with ATi cards

with nvidia they have to match, so ur next card will alos have to be 7900 GS.

thats what i'v heard any way, dont have a sli/crossfire setup myself.
April 17, 2007 5:18:31 PM

You'd need the same model for SLI (GS & GS, GTX & GTX), or a similar model with a BIOS flash (GTO w/ GTX BIOS & GTX, for example).

The architectural difference between a GS and a GTX is too significant to make SLI possible.

Still, if you had a GTX, it would be better than having two GSs in SLI anyway.
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April 17, 2007 5:23:13 PM

Your next card will have to be a 7900GS. The good news is that any 7900GS will work. It used to be that the second card had to match exactly: part number, BIOS version, and brand name. Those restrictions were lifted with recent NVidia drivers.

Keep in mind, you'll also need an SLI bridge... not sure if you got one from Dell when you ordered...

I still don't think SLI is the best option for an upgrade path (unless you get the second card for dirt cheap or free). At this point, you could buy a new 7900GS for around $155 on newegg. OR you could buy an 8800GTS 320MB for $300 and sell your current 7900GS on eBay for around $120. For $180 (vs $155) you get a single card solution that whips the pants off two lesser cards in SLI.

April 17, 2007 5:38:08 PM

Forget About SLI.
Get an ATI X1950Pro/XT or 7900GTX or 8800GTS 320/GTS 640 :twisted: /GTX instead.
But remember to check your power supply and see if your power supply can handle newer graphic cards :!:
April 17, 2007 6:16:49 PM

Thanks for the info, everyone! A big help!
April 17, 2007 6:19:52 PM

XPS 410 only has 1 16X PCI-e slot, so you cant sli, or crossfire or anything better then 1 card. And the XPS 410 power supply can handle an 8800GTX