So i did a mock up last night and i have a 30 mm Alpha Cool 420 radiator and with Push fans there was about just barley 10 mm to the top of my Classifies K motherboard so yes you can mount a 60 mm rad on top with only pull from the top fans but i would be worried about getting enough air flow that way. Personally i would never go that way i always want minimum push from my fans but again that's personal preference. I also think its going to depend on whats the FPI on that 60 mm rad if it is a open low like 17-20 you might be OK, just IMO i would return it and get a thinner rad for the top and use it for the initial cooling then go into your 60 mm rad mounted on the right side and you should be golden

chaosminionx
That is about what I gathered from talking to people today, and reading on the forums.

Previously I bought a 60mm thick, EK 360mm - I am returning that and going with this setup:

Top Radiator is now: Alphacool NexXxoS ST30 Full Copper X-Flow 420mm Radiator w/ 3x Corsair ML140 Pro fans (Clearance in DG-8 case = 65mm, Fan+Rad=55mm)
 
Front Radiator is now: Alphacool NexXxoS XT45 Full Copper X-Flow 420mm Radiator w/ 3x Corsair ML140 Pro fans (Clearance in DG-8 case = 70mm, Fan+Rad=70mm)
 
Seems to check out, I figure if the reservoir bracket on the front (measure 70mm from edge of the bracket to front wall of case [hardware canucks review]) makes it too close, the Dremel will solve that issue.

Hey were you looking at my parts list? LOL thats pretty much my exact

For reference. =) Notice that this spacing is the clearance with the fans mounted to the other side of the brackets, so the clearance is only needed for radiator, unless you want to relocate the fans to the other side of the mounts. I for one will be replacing the fans where they are with my NZXT FN120s. I also am measuring to decide the two 320mm Alphacool NexXxos rads that I will be ordering. I accidentally bought 460's in my rush. Still salty that I am having to wait for gpu water blocks for my 1080 FTWs.
 
Rear spacing:

khione.newoddity.com/images/20160816_204843.jpg
Top spacing:

khione.newoddity.com/images/20160816_204830.jpg

chaosminionx
Would you go dual 30mm rad, or 30mm up top, and a 45mm on the "front" of the case, or dual 30mm in the 420mm length.

That will really depend on your intentions for the right side rad whether your going to push pull them as well, i don't see the need personally so like your 30 mm push/pull on top with 45 mm push on the right that gives plenty of clearance to the reservoir mount and having dual 420 rads will more than enough cooling for anything your planning lol

Seeing as how the price is nominal between the two ($3 when we are in the $90 range) and the extra mm do not affect the resistance in the system,  I am going to go with what you describe. 45mm x 420mm in the right ("front") and a 30mm x 420mm in the top. I was on the fence to fit a 45mm in the top, but I would rather have more clearance and have a cleaner (imho) look.

chaosminionx
Sounds like a solid plan, I think having the extra 10mm will look a bit cleaner as well, ideally it would have been nice if the mounting brackets up top were different, and allowed the radiator to sit up into that recessed area, instead of below.

Agree

chaosminionx
Made a change!

Top radiator, is now a Hardware Labs Black Ice Nemesis GTS 420, 30mm radiator.
Right radiator (front), is now a Hardware Labs Black Ice Nemesis GTX 420, 60mm radiator.
 
Also pulled the trigger on 11 Corsair ML140 Pro fans (wallet loved that) - Replacing the 2 on the left of case, top is going to be 6 push/pull, and front will be 3 push.

If you find you really wanted some Thermaltake Riing 14 RGB's let me know, i have a 3 pak, and am thinking of Corsair ML pro 120's. 3pcs.

Ordered a set of those as well, nice find!

So I learned some things in putting my build together...

60mm thick 420mm radiator fits on the "right" side without issue, and enough clearance for the reservoir bracket. The "top" radiator on the other hand is an entirely different beast...

In order for a top mounted 420mm radiator to fit, I went with a 30mm thick, 420mm radiator x-flow design. In order to fit the 420mm radiator properly in the top there is a little bracket used for the plexi EVGA insert, it has 2 screw's in it, this has to be removed in order to fit the 420mm radiator on top. Also, if you plan on running dual 420mm radiators, with an x-flow style radiator on top, you need to buy some 45, or 90 degree fittings because the "right" side radiator will block the fitting on the top radiator. Needless to say, my build is on hold until this week, when I can get the 45/90° fittings in to make it work.

Top radiator is going to be 30mm with push/pull Corsair ML140 Pro fans, and the "right" is running push only with ML140 Pro's; 11 ML140 Pro in total to replace all the fans on case.

chaosminionx
So I learned some things in putting my build together...

60mm thick 420mm radiator fits on the "right" side without issue, and enough clearance for the reservoir bracket. The "top" radiator on the other hand is an entirely different beast...

In order for a top mounted 420mm radiator to fit, I went with a 30mm thick, 420mm radiator x-flow design. In order to fit the 420mm radiator properly in the top there is a little bracket used for the plexi EVGA insert, it has 2 screw's in it, this has to be removed in order to fit the 420mm radiator on top. Also, if you plan on running dual 420mm radiators, with an x-flow style radiator on top, you need to buy some 45, or 90 degree fittings because the "right" side radiator will block the fitting on the top radiator. Needless to say, my build is on hold until this week, when I can get the 45/90° fittings in to make it work.

Top radiator is going to be 30mm with push/pull Corsair ML140 Pro fans, and the "right" is running push only with ML140 Pro's; 11 ML140 Pro in total to replace all the fans on case.

Ya the top is a pain i only have a single 420 mm rad atm when i get my 2nd 1080 i plan to add a 2nd one for the right side, in order for me to mount my top radiator i ended up having to slide it all the way to the right for enough clearance to reach my reservoir

 
I am not sure how i am going to fit the second radiator i am guessing i will have to slide the top rad all the way left and use a 90 out/in to the right side rad then turn the reservoir so that in feed is facing the front and do a simple 90 bend into the reservoir from the out of the right radiator. I will prolly go with a EK 40 MM 420 for the right side

you would think having such a BIG case things wouldn't be as tight as they are LOL

Im assuming you tried to slide the top as far left and the right one down as far as they can go?

I was super bummed out last night trying to make it work, and sliding the radiators down, all the way to left, etc... Just wasn't gonna happen with the straight fittings.

Also learned the 28mm bolts that come with the radiators are not sufficient, ended up using 30mm M4 socket cap, in black zinc to mount the fans to radiator; the socket cap style fits very nicely into the Corsair ML series..