That Plastic Cover will Melt and Kill the Looks of that Great Looking Motherboards.
My second one did not have that cover and came with a few marks but it works.
But then you do not even have a CPU Installed

Also check:
VRM heat sink not making contact with case.
Any rubber grommets near VRM not keeping mobo off standoffs or causing flexing when board screwed to stand offs.  Had to remove in grommets in my case.

bcavnaugh
Is it required for the Bottom of the "VRM Heat Sink" to make contact the Case or the Motherboard Mount in the Case?

If the vrm heatsink makes contact with the case, the 8 pin eps plugs may not fit and the vrm heatsink May flex. Making contact would be a bad thing normally.

the_Scarlet_one
If the vrm heatsink makes contact with the case, the 8 pin eps plugs may not fit and the vrm heatsink May flex. Making contact would be a bad thing normally.

Not conclusive, but I found it to be a bad thing.
 

bcavnaugh
The X299 has a BIG Bottom Plate that is the same height as a Stand Off and is Flush on the Case or Motherboard Mounting Plate.

 
Fair point.  I could not screw mobo to standoffs fully without VRM/case contact or mobo flexion. Stopped screws at initial resistance felt.
Slightly inclined mobo to get I/O ports to align with case I/O shield.
Removed attached I/O shield from Dark to align with stand-offs and (included with Dark) case I/O shield.
 

I see what you are saying now, I did not have this issue when I installed mine.

A picture of the compartment with the backside of the mother board tray - as you can see the back of the CPU socket is exposed but the VRM back plate is partially covered. Perhaps trying to get a thermal pad on the VRM back plate as I suggested in my previous post would bee too much and flex things a bit. Was thinking about trying to mount a fan to blow air on the back of the socket and board

 
This next picture shows the top of the mother board and the top of the case. There is a spot just over the top of the opening between the two halves of the case where an 240mm radiator will be mounted. Only 2.5" (63.5mm) room there to the top of the mother board. I need to get the cooler and fans to check it but I am thinking if it rubs I will have to change the fans to some thinner ones or remove the now iconic VRM heat sink cover. Removal of the Dark fans and cover should have little to no affect as their will be plenty of airflow from the radiator fans dam near touching the VRM cooler and the fan on the back of the case pulling air across from the front fans
 

 
While waiting for EVGA to get a PSU in stock I will be getting the radiators and fans next
 
 
 
Editnote: FYI - There will be a 420mm radiator down the inside back (Right side) of the first picture

GGTV-Jon
A picture of the compartment with the backside of the mother board tray - as you can see the back of the CPU socket is exposed but the VRM back plate is partially covered. Perhaps trying to get a thermal pad on the VRM back plate as I suggested in my previous post would bee too much and flex things a bit. Was thinking about trying to mount a fan to blow air on the back of the socket and board
This next picture shows the top of the mother board and the top of the case. There is a spot just over the top of the opening between the two halves of the case where an 240mm radiator will be mounted. Only 2.5" (63.5mm) room there to the top of the mother board. I need to get the cooler and fans to check it but I am thinking if it rubs I will have to change the fans to some thinner ones or remove the now iconic VRM heat sink cover. Removal of the Dark fans and cover should have little to no affect as their will be plenty of airflow from the radiator fans dam near touching the VRM cooler and the fan on the back of the case pulling air across from the front fans
 
While waiting for EVGA to get a PSU in stock I will be getting the radiators and fans next
 
Editnote: FYI - There will be a 420mm radiator down the inside back (Right side) of the first picture

Looks nice.  Like case.
Some testers see better results putting radiator on intake front and using case fans high and rear to exhaust. 
I moved my radiator to intake front because of this and not enough space at top.
Push-pull fans on radiator possible if not crammed in top near mobo.

geninfo
Looks nice.  Like case.
Some testers see better results putting radiator on intake front and using case fans high and rear to exhaust. 
I moved my radiator to intake front because of this and not enough space at top.
Push-pull fans on radiator possible if not crammed in top near mobo.

I plan on putting a res / pump combo between the board and the front fans and would prefer to have all heat from radiator transfer to exit the case. This setup will have as many intake fans as there are exhaust fans so with proper fan speed control there will be proper air flow and case pressure.
 
Planned flow path is to be res / pump --> GPU --> 240 rad (top) --> CPU --> 420 rad (back) --> back to res
 
If I was to put a radiator in the front of the case and not use the top mount then I would have to put the res / pump in the second compartment. There is no window on that side. I know some peeps like to hide their pumps. I did look at what changes would have to be done to move the res and pump to the second compartment and just have the tubes ran into the board section I would have to relocate the SSD mount.
 
I admit I am torn when thinking about the res / pump location. While I do think it could have a clean look with the res / pump out of site with just tubing running into view but I also want to show it off, perhaps with some PrimoChill VUE

GGTV-Jon

geninfo
Looks nice.  Like case.
Some testers see better results putting radiator on intake front and using case fans high and rear to exhaust. 
I moved my radiator to intake front because of this and not enough space at top.
Push-pull fans on radiator possible if not crammed in top near mobo.

I plan on putting a res / pump combo between the board and the front fans and would prefer to have all heat from radiator transfer to exit the case. This setup will have as many intake fans as there are exhaust fans so with proper fan speed control there will be proper air flow and case pressure.
 
Planned flow path is to be res / pump --> GPU --> 240 rad (top) --> CPU --> 420 rad (back) --> back to res
 
If I was to put a radiator in the front of the case and not use the top mount then I would have to put the res / pump in the second compartment. There is no window on that side. I know some peeps like to hide their pumps. I did look at what changes would have to be done to move the res and pump to the second compartment and just have the tubes ran into the board section I would have to relocate the SSD mount.
 
I admit I am torn when thinking about the res / pump location. While I do think it could have a clean look with the res / pump out of site with just tubing running into view but I also want to show it off, perhaps with some PrimoChill VUE

You  invoked:
Custom  loop.
Pretty views.
 
No rules now.  Build away. :)
Reservoir and pump in sight fine for custom loops.
 
 

Bottom VRM heat spreader does not have to touch the chassis. It is ok if it does, but only if no physical force is applied to it. There is thick thermal pad between the HS and board surface + standoffs on the HS. If you want absolute best thermals then you may want to add thermal pad sheet of suitable thickness between the heat spreader and your chassis, but the difference is just few degrees on VRM temp, so it's up to you if it's worth that.
 
Also gold colored mount hole near EPS plugs is same as any other mount hole and can be used without limitations to mount board to the chassis.
 

only time anyone would see and 9800GT on an X299 Dark

I use 8600GTS all the time during board testing :D.

TiN_EE
Bottom VRM heat spreader does not have to touch the chassis. It is ok if it does, but only if no physical force is applied to it. There is thick thermal pad between the HS and board surface + standoffs on the HS. If you want absolute best thermals then you may want to add thermal pad sheet of suitable thickness between the heat spreader and your chassis, but the difference is just few degrees on VRM temp, so it's up to you if it's worth that.
 
Also gold colored mount hole near EPS plugs is same as any other mount hole and can be used without limitations to mount board to the chassis.
 

only time anyone would see and 9800GT on an X299 Dark

I use 8600GTS all the time during board testing :D.

Thank you for the information TiN_EE. Nice to see that someone that had their hands in the development of this great motherboard actually peaking at the forums here
 
As to the 9800GT I have in the picture - it is a bad card. It is the only card I had on hand the was PCIE to use as a mock up

Vlada011
That's some Lian Li case on pictures? 
Can't be something else, or someone made quality cases on similar way.

Yup PC-D600
http://www.lian-li.com/en/dt-portfolio/pc-d600/