Just added another GTX 470 and...

[oooen1gmaooo]

Well I just received my 2nd GTX 470 today, installed it, etc. And I have been running some games to see hows things were working and I noticed that my first card is getting hotter than it usually does. I have both of them overclocked at
1.087v/800MHz/1700MHz/ with the fans running 100% at all times. Before adding the card my temps never get above 93c which is still high, but now it goes to 104c before I stop playing my games.
So to make things clear why would my card get hotter by adding a 2nd card? Wouldn't it take some load off each card?
Maybe I should remove the Overclock?
I kind of need the overclock tho because tomorrow I am getting two more monitors in the mail, so I can have Nvidia surround all hooked up but it would be nice to figure out why things are getting so hot.

 

[jprahman]

Whenever you add a second card system temps will increase at least a small amount. The amount of temperature increase depends on system airflow, how much the second card blocks airflow to the first card, whether the cards are external exhaust or internal exhaust, etc.

Which GTX 470's are you using?

Edit: it has also been observed that the card the monitor is connected to often runs ~5C hotter than the slave card.

 

[oooen1gmaooo]

I am using the Palit GTX 470 which has two fans on it, I am not sure about the exhaust think it might be internal.

 

[oooen1gmaooo]

NZXT tempest evo it has 3 intakes and 3 exhausts.

 

[17seconds]

Be careful with that 104c temp, the thermal threshold is 105c. I would back off the overclock. In SLI, you are getting so much performance, it is not necessary. There is no way that you should be up to 104c, even in SLI, with the fan at 100% on a custom cooler. You also need to check your case exhaust fans and airflow, since the GPU exhaust heat is getting dumped back into the case.

 

[EXT64]

Is their space between the two cards, or is the top card very close to against the bottom one?

 

[oooen1gmaooo]

There is an 1" give or take a 1/4" in between the two cards.
I have the old one on top, but I don't think that matters? I just went through and blasted everything w/ a duster can cleaned all the intakes and exhausts. But the temps are still kind of high.
I disabled the overclock for now, but do you think the 470's can handle three monitors at 5760x1080 w/o being overclocked?
I am going to test everything out now w/ the overclock off to see how the temps handle.

 

[EXT64]

If unOC'ed is the only way to lower temps, then I don't think you have a choice. You could try removing the side of your case and using a 6 or 8 inch desk fan to give better cooling. I did that for a while with my 2900XT.