85 C is fine for a gcard, you just need good air flow in the case itself, as the gcard fans blows air in the case, so you need to make sure your case has at least 1 or two fans that blow air out.
 
read this, this concerns the 1080 FE edition, they can reach 85 C in about 4 minutues.
 
http://www.tomshardware.co.uk/nvidia-geforce-gtx-1080-pascal,review-33557-11.html
 
But I would say that the EVGA fans are really good and quiet, I have a 1070 FTW edition, I only seen the card hit about 65 C under load.
 
so bottom line is, 85 C isn't anything to really worry about.

It is well-known that the new cards from Zotac have problems with the fans and temps. They are working on a bios-improvement. Besides, nice card!

85c is getting up there. Running a custom fan curve should bring the temps down. 94c is the max allowed temp for a 1080.

runing my 1080 FTW on air idle 31-32C full load GTA 5 (all max 1440p)  around 62-65C.
the only game that makes my card a bit hot is witcher 3 (all maxed no nvidia hariworks 1440p) 65-68C.
 
hope this helps.
 

Alright!
 
Thank you. You have fully convinced me and i am ordering the card right now. 

FattysGoneWild
You must have a faulty card or something. My case is horrific for air flow. And even though its a FE. With a custom fan curve. I see any where from 70-76c while gaming depending on game. You have a real nice case and should be seeing great temps. It has to be the card. 

it might be his fan setup because he stated that there's only 1 120mm fan exhausting hot air out. u have to remember that AIB coolers expel the heat back into the case unlike an FE's blower style cooler. there has to be proper intake and exhaust for the GPU -- especially when his CPU cooler is also expelling heat and is kind of trapping the GPU's heat below it.

what case do u have? is there fan/radiator mounts at the top? if so, that's a great option for more exhaust fans or a radiator because heat rises. even if u add another fan to your CPU cooler, that'll just be more heat being expelled into your case and no additional exhausting.
 
me, personally, i prefer the cleaner look of a watercooled CPU. loving how quiet and cool my Kraken x61 operates. i would never go back to an air cooled CPU.

yolosgehts
The case is the Corsair 400C. There is space for two more 140mm @ the top. 

I'd grab two fans for the top and set them as exhaust. I run two Noiseblocker eLoop B14-3 fans on my H115i and two of the same on my Kraken X41 - they are a quiet hum in the background (even not being PWM) and have AMAZING performance . Edit: they are a bit pricey, so if they are too much I'd grab 140mm fans with 28dB or less noise rating (I don't like loud fans).

hehehippie

yolosgehts
The case is the Corsair 400C. There is space for two more 140mm @ the top. 

if u don't mind spending a little more extra on your PC then i'd definitely go with an AIO watercooler for your CPU. u will be adding enough exhaust AND cooling your CPU even better. i love seeing my CPU in the 40's after hours of gaming.
 
@arestavo: how are those Noiseblocker fans? i've never had any experience with them before, but they're about the same price as my Noctuas. i have 2 NF-A14 FLX's as intake and 2 NF-P14s redux-1500 PWM's on my Kraken x61's radiator.

Love them! If I use them as intake, the fan closest to the case's grill will buzz a little - so I just use them as exhaust and keep my 200mm side fans as intake. They are noticeable noise wise at 28 dB, but it is a pleasant, but low, fan hum. Worth every penny for the performance and the quiet noise levels.

yolosgehts
I already got two NB BlackSilents, i might try them.

Can i use two fans @ one 3pin connector on the mainboard with a splitter cable?
 
 

pretty sure u can.
 
if u're gonna run 2 more exhaust fans, have u ever thought about getting a fan controller and installing it into one of the bays? i'd turn up the 2 intake fans to 75% or higher. whatever u're comfortable with. then adjust your exhaust fans accordingly so that u still have positive airflow in your case.

ksgnow2010

yolosgehts
I already got two NB BlackSilents, i might try them.

Can i use two fans @ one 3pin connector on the mainboard with a splitter cable?
 
 

 
Motherboard manufacturer's generally don't have a spec for fan header current draw, but if you keep the total current draw below 1.0 A from one fan header you will be safe.  (The current draw for the fan is listed on the fan itself).
 
I run multiple splitter cables for my fan and case.

Agreed that you are generally safe at the 1A.  I run splitters on fans that run side by side and I want the same speed curve on them.  ASUS and MSI specifically list that as the 'recommended' limit in their motherboard manuals.  Haven't owned any different MBs so can't speak to other manuals.  Other option is to get a fan controller that plugs straight into the power supply and has higher ratings.

My FTW (70/450 OC) runs at around 80 degrees when playing Fallout 4 on a mix of High and Ultra at 4K. 
 
System spec. is in my signature, however, it's summer weather and I don't have air conditioning (England). I also have two servers running in my office and the room temperature is approximately 31 degrees. I've owned a FE 1080 and the FTW (in my opinion) is approximately 40% more efficient at cooling the card.
 
I hope that helps.
 
 

yolosgehts
I have already made up a custom fan curve but still no good. 
 
I hope the EVGA FTW will be better :)

 
Why not Hybrid. You have CPU Air Cooler and one more cooler with intake hot air could be too much, maybe.
Temps will be better with Hybrid. Than they will stay really on 60C always.

So my GTX 1080 Story ...

I had 4 (!!!!) GTX 1080 in like 3 weeks (3 of them in 1 week probably)
 
1) Zotac AMP non-extreme -> ****box. Don't buy that. Hot & loud af
2) Gainward Phoenix GTX 1080: Very nice cooling. 73 °C @ 2GHz and 5,3GHz memory but the LED-Controller did not work. So that card went bye bye also. 
3) KFA GTX 1080: Hall of Fame: What a beauty and what a beast. 2.1GHz and 5.4GHz memory @ 71 °C maximum!! But unfortunately this card had the most intense coil whine i experienced so far. Went back the day it came: Today.
4) Now? Well :D I sent the Hall of Fame and Phoenix back and got this one :D

 

 
-> Not as good to OC as the Hall of Fame but it stays @ 75 °C @ 2GHz and 5.3GHz Memory. It is also quiet. So i might just add a bit Voltage to achieve a better OC-Result. But i am very satisfied with it. The best GTX 1080 for me so far. EVGA FTW!

yolosgehts
So my GTX 1080 Story ...

I had 4 (!!!!) GTX 1080 in like 3 weeks (3 of them in 1 week probably)
 
1) Zotac AMP non-extreme -> ****box. Don't buy that. Hot & loud af
2) Gainward Phoenix GTX 1080: Very nice cooling. 73 °C @ 2GHz and 5,3GHz memory but the LED-Controller did not work. So that card went bye bye also. 
3) KFA GTX 1080: Hall of Fame: What a beauty and what a beast. 2.1GHz and 5.4GHz memory @ 71 °C maximum!! But unfortunately this card had the most intense coil whine i experienced so far. Went back the day it came: Today.
4) Now? Well :D I sent the Hall of Fame and Phoenix back and got this one :D

 
 
 
-> Not as good to OC as the Hall of Fame but it stays @ 75 °C @ 2GHz and 5.3GHz Memory. It is also quiet. So i might just add a bit Voltage to achieve a better OC-Result. But i am very satisfied with it. The best GTX 1080 for me so far. EVGA FTW!

 
Another Happy EVGA Customer
 
Only difference is 0.1 GHz = no big deal 
 
Pascal that runs cool = Big Deal. 
 
Heat = throttling kills performance, no matter where your GPU starts