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9800GTX/9800GTX+ SLI questions

post #1 of 10
Thread Starter 
I have had one of these cards for awhile and decided to get another once learning about SLI technology, maybe a year ago now. Is there any way to tell if im doing it correctly? I have the larger card in the primary PCI slot and the smaller card beneath it. SLI bridge connecting the two. Are they even compatible? My cousin (who suggested the SLI move) says they might not even be the same card:mad:. Help?
post #2 of 10
They have different clockspeeds and die size but they should work because the gpu is almost the same, does'nt make any difference the order of the cards sit on the board.

After you enable SLI set the clockspeeds of boath cards to the same so you dont get crashes or intability, use MSI Afterburner.
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post #3 of 10
Thread Starter 
What a relief. Thank you for the quick response. However, after applying the SLI bridge, I searched thru the Nvidia Control Panel and other places to find an option to set SLI settings and the like, and the word SLI is nowhere to be found. Am i missing something can I just assume that they are working together? confused.gif
post #4 of 10
They have the same die size. They're both 9800 GTX+ so 55 nm. The older, plain 9800 GTX was 65 nm. The longer card below is built on a better PCB. That doesn't matter much, though I'd put it in the first slot.

gf9800gtx-scan-front.jpg

gf8800gts512-scan-front.jpg

They should SLi without issues since small differences in clock speeds don't matter. They'll just adjust to the slower Mhz card. Is your board SLi compatible?
Edited by Johnny Doe - 11/2/11 at 11:42pm
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post #5 of 10
Download GPU-Z it will tell you
post #6 of 10
Quote:
Originally Posted by JayClay3000;15553093 
What a relief. Thank you for the quick response. However, after applying the SLI bridge, I searched thru the Nvidia Control Panel and other places to find an option to set SLI settings and the like, and the word SLI is nowhere to be found. Am i missing something can I just assume that they are working together? confused.gif

Need your motherboard spec, if its AM3 then most probably not sli-capable. In which case apply SLI patch

http://www.techpowerup.com/forums/showthread.php?t=153046
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post #7 of 10
They are sli capable, they were marketed as such.

And i've tried it. IT was my 1st SLI experience.

Just remember to use the GTX+ as 1st card for performance.
post #8 of 10
Thread Starter 
Quote:
Originally Posted by SpartanVXL;15553177 
Need your motherboard spec, if its AM3 then most probably not sli-capable. In which case apply SLI patch

http://www.techpowerup.com/forums/showthread.php?t=153046

Here is the Spec page for my Mobo
http://www.foxconnchannel.com/product/Motherboards/detail_spec.aspx?ID=en-us0000495


I see it says ," Supports Socket AM3 with HT3.0 interface " there. Is that the problem?
Im still looking around for anything that confirms the cards being properly SLI'd and cant find a hint of success.
post #9 of 10
Thread Starter 
Quote:
Originally Posted by Bodycount;15553168 
Download GPU-Z it will tell you

Downloading Now. Thanks!

[Edit] The SLI section says "unknown". Damn.
Edited by JayClay3000 - 11/3/11 at 12:17am
post #10 of 10
AMD 890GX chipset, so no SLi support. However the SLi patch mostly worked on 790/890FX chipsets. Here's the updated version of it; you have to use it to SLi

http://www.techpowerup.com/forums/showthread.php?t=153046

If that doesn't work or if you don't constantly want to deal with the patch, then you can shoot for this board:

http://www.newegg.com/Product/Product.aspx?Item=N82E16813131636

No Bulldozer support though I see that a little irrelavent right now... you know, with the new AMD chips sucking too much power while underperforming. It makes me find my old X4 975 to be a better choice. lol.

One more thing, those cards unfortunately don't pack much power anymore. They're up there with a GTX 280, while performing worse under Anti-Aliasing/high vRAM situations. So if you don't want an SLi capable mobo, I'd just get a reference HD 6870, which would trump a 280 or a GTX 460.
Edited by Johnny Doe - 11/3/11 at 12:18am
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