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Mix gtx 680's with different clocks?

post #1 of 8
Thread Starter 
I have an EVGA GTX 680 4gb backplate edition. According to EVGA Precision the base clock is 1038 and the boost clock is 1084. However without my overclock when playing any game the card clocks up to sometimes 1241 at maximum (my overclock puts it at 1254 stable) or 1110 minimum.

I cannot find my card on newegg anymore or any other site for that matter, so I was thinking I would order this - http://www.newegg.com/Product/Product.aspx?Item=N82E16814130794

The clocks are a bit higher but the VRAM is the same. I understand how kepler is dynamic and I believe that in SLI the clocks can be different and do not have to be the same. If this is the case does this mean the one card can be lower than the other while the faster one remains at its highest clock? In other words the faster one does not have to scale to the slower one?

Thanks for any info and help. I am a bit concerned that my card does not seem to be available anymore.
post #2 of 8
Quote:
Originally Posted by Dan3345 View Post

I have an EVGA GTX 680 4gb backplate edition. According to EVGA Precision the base clock is 1038 and the boost clock is 1084. However without my overclock when playing any game the card clocks up to sometimes 1241 at maximum (my overclock puts it at 1254 stable) or 1110 minimum.
I cannot find my card on newegg anymore or any other site for that matter, so I was thinking I would order this - http://www.newegg.com/Product/Product.aspx?Item=N82E16814130794
The clocks are a bit higher but the VRAM is the same. I understand how kepler is dynamic and I believe that in SLI the clocks can be different and do not have to be the same. If this is the case does this mean the one card can be lower than the other while the faster one remains at its highest clock? In other words the faster one does not have to scale to the slower one?
Thanks for any info and help. I am a bit concerned that my card does not seem to be available anymore.

I may be wrong, but the weaker card will «slow down» the other. A multi GPU setup is only as strong as his weaker GPU times the scaling (almost 2 for this gen).
post #3 of 8
u can use it but clock will default to the lower ones. my 880GTX's, 260's and 470's all were different clocks and ran fine
post #4 of 8
Thread Starter 
Thanks for the replies. I could have sworn this was different with 600 series because the cards clocks are so dynamic...
post #5 of 8
The speed will be determined by the slower card

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post #6 of 8
The clocks work independantly of each other and doesn't down clock to the slower card in SLI. My gtx 690 core clocks differ from one another after benching and you can tell on the graghs of Afterburner. One core hits 1189MHz, while the other hits 1178Mhz.

Look at my Sig 3dmark11 score for my gtx 690 and you'll see the different clocks.
    
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post #7 of 8
I can confirm that both my GTX 670's run at different clocks and work fine. The higher clocked GPU DOES NOT clock down to the lower clocked GPU.
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post #8 of 8
Thread Starter 
Sweet thanks guys! I was sure they worked independently of each other after watching a video from pcperspective where the host and someone from EVGA explained how kepler was independently dynamic.

Wish I could find it right now.. Anyways thanks again!
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