i'm surprised no one answered your Question yet.

i don't have this Model but i doubt that the Card needs to be that Short. open the Case Panel and measure the Space around currently installed Card. Note: most of the 3rd Party GTX 1080Ti Cards are Tripple Slot Cards. i think the 1080TI Founders Edition is a pretty Save Choice.

Hi nichu010‌,

This is the supported reference card: GeForce GTX 1080 Graphics Cards | NVIDIA GeForce  

So check the card dimensions since they will need to match the reference one. 

Just istalled asus turbo 1080ti in my r6 it fits

Great Job. do you like it? how is the GPU Noise Level in this Machine?

Thanks for the report.
 
I've been wondering if cards slightly taller than a 1080-FE would fit behind PS bracket. While your card isn't a full 1-inch taller (like a MSI Gaming-X is) it does appear to be slightly taller than normal.

Thank you all for the help.

‌ , do we have enough power supply cables from the PSU? could you please post a photo?

confused about that 8 pin + 6 pin connection

   I had to upgraded my PSU my stock psu wasn't going to cut it so i got a corsair HX750i all cables came with it except for 

yeah i was going to get the ASUS ROG-STRIX-GTX1080-O8G-11GBPS ROG Strix GeForce GTX 1080 8GB 11Gbps OC Edition actually ordered it on amazon but went to their web site and started to read specs AND at 11.5 in. NOPE wasn't going to fit went back to amazon and canceled order. But the dimensions on the turbo was same as stock Founders Edition 10.5 inches    

Whisper quiet cant hear a thing really but haven't really stressed it to much only had Oculus rift on it and had the gpu settings  for what i was playing maxed and still didn't hear anything from fans didn't get any alerts from within the game but did when i had the stock  GTX 1070 Installed and could hear the fans on that had to drop out of max settings now i dont anyway so far so good.

I did fit in ASUS ROG Strix 1080 TI by moving the front fan to under the gpu (just laying down in the gap)

Thanks. very helpful Info you got there.

was it a hassle changing the PSU?

Hi, Is there enough power supply cables for a 1080ti? I got a 850W PSU

You will see extra 2pin that slides right next to the 6pin that you are talking about, it will make 2 8pin sets. it is nicely grouped together so you can't miss it.

Yes, it's already installed on your unit, you will see exactly same extra cable connector right next to your currently connected cable that is put it into your card.