Dual Monitor Extra GPU worth it?

I have the 760 but it's only has 2gbs of vram thus causing some delay when I add a second monitor.
My question is, would it be worth it to add my spare 470 for the second monitor even though it draws more power and creates so much heat?

 

What power supply do you have?

 

you cant SLi them in the first place...

There are 2 options here. 1. you could sell both cards and pick up a 4GB GTX770, 780 or AMD 290X. 2. sell the 470 and buy another 760 for SLi

 

I dont think hes talking about SLI, I think he wants to run a second card just to output to another monitor. Heck he could run Physx off of it too, but it would be power hungry.

 

I have the Antec 750W PSU

And yes I wasn't thinking of putting them in SLI due to the fact that's it's not possible. Like you said I just want to run the second card to output it to the second monitor.

 

Well, Ive tried running a monitor off my second 680 and it wont let me - the only thing i can do is plug it into the first card. it doesnt give me any other choices.

 

Maybe it's a nVidia thing but I can say that isn't the case for me and AMD cards. I can run displays off my 6870 just fine but the cards can't be in crossfire while I do it.

 

With SLI disabled?

 

About the current draw... it could be debatable really... Cards clock higher when two outputs are used usually...

680 does not allow other GPU's to be used...? That is really odd, against WDDM policy and whole idea as such... never had this problem with older cards, I am multi monitor junkie myself...

EDIT.

With SLI one can only use primary card, yes. Had also this with my old GTX280 pair.

 

I don't think it would be worth it with the GTX470. I'd sell the GTX470 and pick up something like a GTX650 or GTX650Ti to run the second monitor.

And nVidia has no problem doing this, as long as they cards aren't in SLI, which obviously they wouldn't be since they aren't matched. I've got 3 monitors running off my GTX650Ti and GT640, my primary monitor on the GTX650Ti and the other two on the GT640.

 

I remember I used some older 8th series slow crap card for additional third screen 7400?, I made an overkill... the mouse lagged so much switching to that screen, I had to overclock it, as it didn't handle windows animations xD and obviously it helped. I guess those old times are gone... I hope so...

 

Thanks for the help, though I don't see getting much for an old 470, though buying a 650 seeks like a good idea. Would there be much of a benefit between the 470 and the 650 even though it's just going to be for a second monitor?