I have a few of these cases all running 7-8 x 1080 ti's Founders Edition cards, and the airflow is easy to manage and they work perfectly for me.
I have set them up both ways and they work fine drawing air front to back as they are designed, and also the other way around pushing air out the front.
My setups are all in a data center with great air conditioning and and they mine at around 53-59 degrees

I'm curious if anyone has one setup with 7-8 GPU's that are non FE, and use aftermarket coolers and have 2 or 3 fans pushing air all over the place?
I think it might still work OK with strong exhaust fans to get rid of all the air, but I wanted to hear from someone who has done it before I buy lots of cards.

Any input appreciated

[Rosewill Tokamak - 1500 Watt Power Supply80 PLUS TITANIUM Certified]

I have 2 power supplies for sale that I no longer have any use for.
I will consider trades for Nvidia GTX 1070 or 1080 ti

The 1500W was used for ~2 months and has worked flawlessly until I pulled it and put it back in original packaging
The 1600W PSU is brand new in the box and has never been used.

Rosewill Tokamak 1500W - $300
Rosewill Hercules 1600W - $300

Rosewill Tokamak - 1500 Watt Power Supply
80 PLUS TITANIUM Certified
Continuous 1500W@40 degree C
Active-PFC with auto AC-input voltage adjustment (100-240V)
Single strong 12V rail - ideal for gaming system
Full Modular Cable Management
SLI & CrossFire Ready - 12 x 6+2pin connector
Silent 135 mm fan with auto fan speed control
LED Indicator Sends Alarm Signals at 90% Load
1 x 20+4-Pin Main Connector
2 x 4+4-Pin ATX12V/EPS12V Connector
12 x 6+2-Pin PCI-E Connector
16 x SATA Connector
6 x 4-Pin Peripheral Connector
1 x 4-Pin Floppy Connector

Rosewill Hercules 1600W
80 PLUS GOLD Certified
ATX12V v2.3 & EPS12V v2.92
SLI & CrossFire Ready
Fully Modular Power Supply
Continuous 1600W@50 degree C
Silent 135mm Fan with Auto Fan Speed Control
1 x 20+4-Pin Main Connector
1 x 8-pin EPS12V Connector
1 x 4+4-Pin ATX12V/EPS12V Connector
Modular Cable:
16 x 6+2-Pin PCI-E Connector
16 x 5-Pin SATA Connector
6 x 4-Pin Peripheral Connector
2 x 4-Pin Floppy Connector

I have 2 power supplies for sale that I no longer have any use for as I have switched to server PSU's
Local pickup preferred in Silicon Valley, CA...or we will have to try and work out shipping for these beasts

The 1600W PSU is brand new in the box and has never been used.
The 1500W PSU was running a 5 x 1080ti system, and worked flawlessly

Rosewill Tokamak Titanium 1500W - $330
Rosewill Hercules Gold 1600W - $320

Rosewill Tokamak - 1500 Watt Power Supply
80 PLUS TITANIUM Certified
Continuous 1500W@40 degree C
Active-PFC with auto AC-input voltage adjustment (100-240V)
Single strong 12V rail - ideal for gaming system
Full Modular Cable Management
SLI & CrossFire Ready - 12 x 6+2pin connector
Silent 135 mm fan with auto fan speed control
LED Indicator Sends Alarm Signals at 90% Load
1 x 20+4-Pin Main Connector
2 x 4+4-Pin ATX12V/EPS12V Connector
12 x 6+2-Pin PCI-E Connector
16 x SATA Connector
6 x 4-Pin Peripheral Connector
1 x 4-Pin Floppy Connector

Rosewill Hercules 1600W
ATX12V v2.3 & EPS12V v2.92
80 PLUS GOLD Certified
SLI & CrossFire Ready
Fully Modular Power Supply
Continuous 1600W@50 degree C
Silent 135mm Fan with Auto Fan Speed Control
1 x 20+4-Pin Main Connector
1 x 8-pin EPS12V Connector
1 x 4+4-Pin ATX12V/EPS12V Connector
Modular Cable:
16 x 6+2-Pin PCI-E Connector
16 x 5-Pin SATA Connector
6 x 4-Pin Peripheral Connector
2 x 4-Pin Floppy Connector

I am having a really hard time getting this board to work with more than 4 1080 ti Founder Editions.

Brand new Asus Z270-A with a Pentium G4400, and a single stick of DDR4.
It's on the latest bios and I've tried 4G decoding on/off, changed PCIE speeds from auto to gen1/gen2, disabled audio, etc.
Installed windows 10 more than a few times and the best I can get is 4 working and the 5th with error code 43.

I even tried running 2 cards in the X16 slots, and then 3 via risers in the remaining X1 slots but that still doesn't work
Tried adding one at a time...but I just can't seem to crack this thing!

The risers are ver 006c with the SATA to 6 pin PCIE and I'm only powering one per SATA chain/cable.

I can get them all to work individually on pretty much any slot, but once I plug them all in, I end up with 2, 3, or 4 working.
It just almost seems random as to how many will work and in which slots. Even boots without showing all the cards, and then you move them around and they show up.

I'm at the point where I'm going to switch motherboards to something else, unless I can get some solid advice from someone that has 1080ti's running

Just curious if anyone has any experience setting up multi GPU rigs using risers on Supermicro motherboards.

I have an X10SRL-F that won't detect more than 1 GPU with risers and I can't seem to get it working no matter what settings I change in the bios
I've tried above 4g decoding on and off. Changed PCIE speed to Gen 1/2/3, and tweaked a bunch of other things without any luck.

This board would be perfect as it has IPMI for remote management and 6 x PCIE v3 and 1 x PCIE v2.
Here's a quick review - https://www.servethehome.com/supermicro-x10srl-f-review-xeon-e5-v3-motherboard/

Any help appreciated!