GTX 770 SLI Question!

[kewlguy239]

I currently own an EVGA GTX 770 FTW 4gb Edition Graphics card.

I already know I cannot purchase a 2gb model to setup SLI.

But can I purchase a 4gb Superclocked edition for SLI? Will it work? Are there any catches?

Anyone who has tried this before and has input, it would be greatly appreciated.

 

[Eduello]

It'll work, the manufacturer and the clock speeds don't matter when doing SLI.

 

[kewlguy239]

will it auto sync the clock speeds based on the card in the primary slot? or will it revert both back to reference clock speeds?

 

[Mousemonkey]

will it auto sync the clock speeds based on the card in the primary slot? or will it revert both back to reference clock speeds?

It has been a while since I used cards with different clock speeds in SLi so I cannot say for certain what the drivers will do but as you can override the settings with Afterburner anyway it doesn't really matter.

 

[Jay Lavistria]

The faster card will clock down to match the slower one.
Simply overclock them both to the same speed, and you'll be fine.

 

[Mousemonkey]

The faster card will clock down to match the slower one.
Simply overclock them both to the same speed, and you'll be fine.

Have you seen this for yourself and if so what cards and driver version?

 

[Eduello]

Here's a fairly recent video of what happens when you manually clock the other card higher (benchmarks start at 1:30):
[video="https://www.youtube.com/watch?v=6jDZ0M2WyDo"][/video]
As you can see, the faster card will not operate at full power, because it has to wait for the slower one. I'd assume that the same would happen if the stock clocks of the other card happened to be faster, although I didn't manage to find a video about that.

 

[Mousemonkey]

Here's a fairly recent video of what happens when you manually clock the other card higher (benchmarks start at 1:30):
[video="https://www.youtube.com/watch?v=6jDZ0M2WyDo"][/video]
As you can see, the faster card will not operate at full power, because it has to wait for the slower one. I'd assume that the same would happen if the stock clocks of the other card happened to be faster, although I didn't manage to find a video about that.

The first thing that springs to mind is "why didn't they do a reboot with the "apply OC settings at startup" button active?" because that is what I do which could explain why my findings have always been different to those kind of vids.

 

[Eduello]

@Mousemonkey: What were the results you got? I'm curious since I'll probably be doing SLI with my GTX 760 in a month or two.

 

[Mousemonkey]

@Mousemonkey: What were the results you got? I'm curious since I'll probably be doing SLI with my GTX 760 in a month or two.

Like I said earlier I have not used different cards in SLi for some time but with the last few rigs (8800GT's, 560Ti's and 660Ti's) I always do a reboot after OC'ing and set "Apply overclocking at system startup" to "On".