I have 1080Ti SC Blacks in SLI. Hottest my top card got was peaking at 78c while playing ghost recon wildlands on stock fan curve. I now run a custom curve using Precision giving me from low to mid 70's. Depends on the game of course. Played Diablo 3 last night with my cards at about 35c or other games I'll see anywhere from mid 60's up to about 75c. I have 3 corsair (120mm if I remember right) fans at the front of my case on intake and a single fan at back for exhaust. Running those at about 65% so gets the hot air out pretty well. My CPU (i7 7700k) is on an EVGA CLC 280mm cooler. I'll see temps vary roughly from 55 to 65c no matter what game I'm playing. CPU Idle temps at about 25 to 30c. My top card can run a few degrees hotter at times but not a concern at all. I never hit 80c to this day no matter what I have done. Also when I game I don't run over clocks. I have an Acer Predator X34 that maxes at 100hz anyway so my Ti's get the job done at stock!

And your ambient temperatures ............................

willdearborn

arestavo
It really, really depends on your computer case and the case airflow.
 
As you undoubtedly know, any high end non-blower card NEEDS good air flow to exhaust the hot air out of the case, as the ACX/iCX cards don't do that. More than doubly so with multiple high end cards dumping 200+ Watts each into your case.
 
Again, it really depends on your case and the airflow.

 
I have a Lian Li PC D600 and it has 3x 120mm Noctua 2000PRM fans (on a controller, so about 1500RPM most of the time, but can be turned up if needed) about 2-3 inches from the cards so they get great airflow. Pretty much the entire front of the case is those 3 fans. The case is really perfect for aircooling blower style cards. I just don't know if that much air intake is right for iCX cards. Maybe I'd be better off turning the 3 intake fans into exhaust fans if I bought 1080Tis, but I'd rather not have the hot air blowing out the front of the case. Or maybe I'd just have to stick to founder cards.

I once forgot to turn on the three 200mm fans as intake that I've got on the side of my Fulmo GT case and my AIO water cooled 1080 Ti GPU temp rose 10C hotter than usual. I had two 140mm fans up top as exhaust at the time, a 120mm as intake above the rear IO, and a 200mm fan in front as intake.
 
Prior to that I had SLI 780 Tis, and SLI 780 Ti Classifieds. They had about two to three inches of spacing between them, and the top card always ran about 10C hotter even with similar massive airflow. I got it to drop a couple of C by installing that third fan so that it blew in between the cards. For my case, increased airflow from the front to the rear didn't have as much of an effect as a massive amount of intake from the side. A 1080 Ti SLI setup would likely show similar results.
 
Your case could be different as my Fulmo GT is really open with a lot of little and big breather holes everywhere.

willdearborn

arestavo
 
I once forgot to turn on the three 200mm fans as intake that I've got on the side of my Fulmo GT case and my AIO water cooled 1080 Ti GPU temp rose 10C hotter than usual. I had two 140mm fans up top as exhaust at the time, a 120mm as intake above the rear IO, and a 200mm fan in front as intake.
 
Prior to that I had SLI 780 Tis, and SLI 780 Ti Classifieds. They had about two to three inches of spacing between them, and the top card always ran about 10C hotter even with similar massive airflow. I got it to drop a couple of C by installing that third fan so that it blew in between the cards. For my case, increased airflow from the front to the rear didn't have as much of an effect as a massive amount of intake from the side. A 1080 Ti SLI setup would likely show similar results.
 
Your case could be different as my Fulmo GT is really open with a lot of little and big breather holes everywhere.

Right now with blower cards and space between them each card runs at about the same temp. I'm just thinking if I switched to iCX cards temps might get worse with my case.

Likely the top card will run hotter as is typical for ACX/iCX style coolers - but there's only one way to know for sure.

Havent had to much time yet with my 1080 Ti's as they came in late. Max temp is 55'C in World of Warships so far. Max temps in Ghost Recon Wildlands for me is 68'C.

I have the ICX Cooler, just not the sensors on my SC Black Edition. Aggressive fan profile with max fan @ 60'C

cjsquirrel
I have 1080Ti SC Blacks in SLI. Hottest my top card got was peaking at 78c while playing ghost recon wildlands on stock fan curve. I now run a custom curve using Precision giving me from low to mid 70's. Depends on the game of course. Played Diablo 3 last night with my cards at about 35c or other games I'll see anywhere from mid 60's up to about 75c. I have 3 corsair (120mm if I remember right) fans at the front of my case on intake and a single fan at back for exhaust. Running those at about 65% so gets the hot air out pretty well. My CPU (i7 7700k) is on an EVGA CLC 280mm cooler. I'll see temps vary roughly from 55 to 65c no matter what game I'm playing. CPU Idle temps at about 25 to 30c. My top card can run a few degrees hotter at times but not a concern at all. I never hit 80c to this day no matter what I have done. Also when I game I don't run over clocks. I have an Acer Predator X34 that maxes at 100hz anyway so my Ti's get the job done at stock!

Honestly that's pretty damn impressive. It's really hot where I am but I'm still hitting temp limits on a fe 1080 ti at stock settings. Crazy you're able keep it cool in SLI with the non-reference cooler