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can I sli a GTX 580 with a GTX 580 (SC version)?

post #1 of 9
Thread Starter 
I have a EVGA GTX 580 SC which is just overclocked from the factory in the bios, if I were to buy a regular EVGA GTX 580 (not superclocked) could it still be put into SLI with my superclocked card?
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post #2 of 9
Yep.
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post #3 of 9
Thread Starter 
Quote:
Originally Posted by juano View Post

Yep.

thank you for clarifying that for me. Was not sure how that worked being the same card but different at the same time. + rep
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post #4 of 9
Quote:
Originally Posted by Ratjack View Post

I have a EVGA GTX 580 SC which is just overclocked from the factory in the bios, if I were to buy a regular EVGA GTX 580 (not superclocked) could it still be put into SLI with my superclocked card?

Yep, both cards will SLI just fine.

When SLI is activated in the drivers, the SC version will have to clock down to normal speeds in order for it work. Or you can manually overclock the normal version to match the SC speeds. biggrin.gif
post #5 of 9
Im not 100% sure of this, but I believe that both the cards have to run at the same speeds, so ure OC'd card MIGHT be running at the stock speed, unless you OC ure non OC'd card.
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post #6 of 9
Quote:
Originally Posted by The Muffin Man View Post

Im not 100% sure of this, but I believe that both the cards have to run at the same speeds, so ure OC'd card MIGHT be running at the stock speed, unless you OC ure non OC'd card.

Yep will run at the lower clock speed thumb.gif
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post #7 of 9
the way it works is that the higher clocker will just automatically decrease it's frequency to match the lower one.

so yes, it will work.
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post #8 of 9
Actually the two cards can run at different speeds, at least in terms of what you'll see on the graphs in Afterburner.

AFA the performance goes, though, in all likelihood you'll get the perf you'd get if both cards were running at the slower speed.

What happens is that the slower card runs at 99%, the faster one runs at like 95%. It sorta 'waits' for the slower one. Although that may not be universal on all games, I tested it with Far Cry 2 one time and that's what happened ... I presume that's how it always works but I'm not 100% ... plus that was with Crossfire, and it was quite a while ago, so it may be different.

The best solution IMHO however is to flash the SC bios onto the other card ... that makes 'em identical wink.gif
    
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post #9 of 9
Quote:
Originally Posted by brettjv View Post

Actually the two cards can run at different speeds, at least in terms of what you'll see on the graphs in Afterburner.
AFA the performance goes, though, in all likelihood you'll get the perf you'd get if both cards were running at the slower speed.
What happens is that the slower card runs at 99%, the faster one runs at like 95%. It sorta 'waits' for the slower one. Although that may not be universal on all games, I tested it with Far Cry 2 one time and that's what happened ... I presume that's how it always works but I'm not 100% ... plus that was with Crossfire, and it was quite a while ago, so it may be different.
The best solution IMHO however is to flash the SC bios onto the other card ... that makes 'em identical wink.gif

I remember when I had 570s in SLI, one would be faster than the other and when I tried running a benchmark (3DMark11) it would provide better scores if one is faster than the other as opposed to just running both at the same speed since they of course don't have the same overclocking performance. I don't know how this translated in games as I've never tested that though, but I just left one overclocking better because it made sense in benchmarks.
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