Beaches

that's his old build

mann i drew fancy pics in paint, forgot about the case manual haha. With the CPU blocks they are all the supremacy evo line, the only difference is the underside which makes contact with the cpu, it comes in nickel and copper, [shinny, or shinny orange haha].
 
Heres this: https://www.dazmode.com/store/product/ek-bay-dcp-2_2-combo-unit-with-pump/
But you would have to physically cut a hole in the side of the case, on the PSU side. Maybe you could mount it on the HDD bracket somehow with the face popping out the side. Not sure about the dimensions though especially with the radiator above. I might be better to consider the tube combo unit, which you can mount to the motherboard panel so you can see your fluid from the window.
 
Dunno about performance differences, google it, usually at most 1-3 degrees C really depends on the fans RPM and the speed of the pump.

ok, not gonna say anything more about the titan x, just making sure you weren't buying for performance or to be 'future proof'
Rads are always physsically larger then the actual specs, you need more room to include the fitting, even AIO rads are larger, but that should be taken into account by case manufacturers. It can be an issue when you got really close mounted rad (Like a rear and a top) but you are only using 2 rads and you got mounting options. The specs on fractal design's site specify how tall the rad can be, which is 278mm, i am honestly not sure if 280mm is 278mm rounded up, so try checking for rads that are within specs
Water cooling compatibility Front (right chamber) - 240 mm radiator configurations up to 60 mm thick (with fans) and 278 mm tall are allowed. Front (left chamber) - 240 mm radiator configurations up to 60 mm thick (with fans) and 278 mm tall are allowed. Using a radiator in this position prevents the use of a fan in the top position just next to it. Top (right chamber) - 240/280 mm radiators up to 130mm thick (with fans) may be fitted if the HDD drive bays are taken out or placed elsewhere. No limitation to thickness. Top (left chamber) - 240 mm radiator configurations up to 130 mm thick (with fans) will fit. Radiators in this position limits the height of memory modules to 48 mm tall.

According to the case specs, this one should fit
http://www.frozencpu.com/products/12699/ex-rad-224/Magicool_Extreme_Dual_120mm_Radiator_LC-RADI240S.html?tl=g30c95s160
No idea the quality of that rad, just giving it as an example

I thought you already had the titan x, honestly, it's an odd card, the 980 ti is much more reasonable, and priced more reasonably, just...consider it. My bet is when the 980 ti starts being outdated, so will the titan x, vram won't be the defining factor, and the 980 ti still has a shit ton of vram, but 12 gigs is insane
http://www.evga.com/Products/Product.aspx?pn=06G-P4-4999-KR
Not judging at all, just, the 980 ti is a better option for 95% of people

Ok, with only one titan x you definitely don't need more than 2 rads. You could grab a smaller PSU depending on how soon you plan to grab another titan x. Also in the next fortnight Skylake CPUs will be released, if you don't care then yea that's fine just making sure you know the next set is right around the corner. I don't mean to pry but sacrificing one titan x gives you allot more budget to watercool. I don't believe $500 CAD will be enough, more realistically $750-900.

never heard of 40mm, ive heard of 45mm, but yeah, that's a decently thick rad. Try to get a low fin density rad (That's why i was advocating for thickness) on the front so the ariflow won't be too impeded.

ok so total TDP of that guys build is for 2 x 290s and an i7 ~~660watt and yes 4 radiators is completely overkill. You cannot cool your system below the ambient temperature of the room so say if your room is 25 dc then you will be unable to go below that. For your build I'm guessing an i7 and 2 x titan Xs TDP = 590 watts.
 
I believe with that build the guy was just trying to see what he could shove into the case because it is quite small. For you build I would think that a 45 or 30 mm thick rad in the front chamber in push and a 60mm or 80mm in the rear in push/pull would be enough. Following the aforementioned rule of thumb - 2 + 1 = 3 --> 3 x 120 = 360. So 480mm of radiator space should be enough and with thicker rads should be even better.
 
To provide you will some more advice could you please list your full build, also do you plan to overclock? Are you trying to keep to a colour scheme? Unfortunately I don't believe the node 804 has a 5.25" drive bay, it can support a slimline optical CD drive on the front edge of the case, so I don't think the DBAY will fit  unless you're willing to get creative with an electric jigsaw.
 
EDIT:
 
Also where do you live, Canada? I only know of Dazmode, and shit compared to PCCG its expensive, hahaa.
 
Basics:
 
-- CPU BLOCK https://www.dazmode.com/store/product/ek-supremacy-evo-acetal/ -- PUMP/RES  https://www.dazmode.com/store/product/ek-d5-vario-x-res-140-incl-pump/ https://www.dazmode.com/store/product/nexxxos-st30-full-copper-240mm/ -- RAD 1 https://www.dazmode.com/store/product/nexxxos-monsta-240mm/ ------- RAD 2

That's total overkill, nothing wrong with that, but think of it this way, if you're cooling a CPU a 280mm rad is more than you'll ever need, and a thin one. A GPU can do perfectly fine with a single 120 or 140, so a thick 280 and a thick 240 is already more than you'll ever need, that build is more of a showcase piece.

hmmm well, on the fractal page you can see the water cooling compatibility, thus:
"Water cooling compatibility
Front (right chamber) - 240 mm radiator configurations up to 60 mm thick (with fans) and 278 mm tall are allowed. Front (left chamber) - 240 mm radiator configurations up to 60 mm thick (with fans) and 278 mm tall are allowed. Using a radiator in this position prevents the use of a fan in the top position just next to it. Top (right chamber) - 240/280 mm radiators up to 130mm thick (with fans) may be fitted if the HDD drive bays are taken out or placed elsewhere. No limitation to thickness. Top (left chamber) - 240 mm radiator configurations up to 130 mm thick (with fans) will fit. Radiators in this position limits the height of memory modules to 48 mm tall. *Maximum radiator configuration: 1x240mm,1x280mm and 2x120mm radiators simultaneously."
 
- also, the maximum length gpu is up to 320mm. Now if this is up to the edge of the front fans then with a Hydro copper (~270mm) you'll have 5cm to play with. So it seems then that mounting your radiators on the roof of both chambers would be a better option.
 
i.e. two 240 rads in total. Probably less than 40mm thick in the front chamber to avoid clearance issues with the motherboard and to avoid blocking the view of the motherboard from the window, don't forget you need to add 20mm for fans, would probably only do push or pull not push/pull on this side.
 
In the rear chamber you could grab a 60mm thick 240 rad, I don't see any cable management issues and this chamber isn't visible, you could do push/pull here. The thicker the rad the better, also you will be able to mount one of those HDD racks on the floor of the rear chamber next to the PSU if you were planning on using a HDD. Have a look at the bottom half of page two of this review for some pics --> [http://www.bit-tech.net/hardware/cases/2014/09/17/fractal-design-node-804-review/2]
 
For a pump, considering this is such a small case  then maybe a combo unit like the EK XRES 140 D5 PWM [1500 Litres/Hour, more than enough]. You'll have to check if this will fit but it could go in the front chamber to the right of the mobo, mounted to the back panel or onto a fan with one of these [https://shop.ekwb.com/ek-uni-pump-holder-120mm-fan] I think aquatuning have them, not sure where you are. You may have to get the 100 version as the 140s total height is 193mm, but the 140 should fit, and hide all the cables behind it.
 
If your still confused about radiator size etc just remember they are offered in different lengths and thicknesses which you will have to look in the product details for, there are also different series [for EK there is PE, XE, CE, WE...urgh!] these usually indicate the thickness, but also they have differing FPI [Fins per inch, which indicates basically the density of the radiator]. Check out this video from the 1:30 min mark for more help [--> https://www.youtube.com/watch?v=HzRdutIq-VE].
 
For fans, you should grab some high static pressure ones, like these new EK Vardar F4 120s, or maybe the Fractal Venturi HPs. [EK F4 review --> http://thermalbench.com/2015/06/29/ek-vardar-f4-120er-120mm-fan/]
 
Also mebe smack some magnetic dust filters to the fan ports on the outside of the rear of the case to stop dustification.
 
Anyhow, hope that helps.

i would get at least 480mm of radiators (in length of course)
 
there is a formula: add the number of CPUs and GPUs, add one, and multiply by 120
thats the least amount of length you will need

1000W is more than enough. How do I know? I know because I'm using the same CPU with two R9 Fury Tri-Xs and there's still a good amount of wattage left.

Should be fine with 1000W yes. EVGA 1000W G2 is great of course but there are plenty of options so don't go thinking you're stuck with EVGA. Check out the PSU whitelist in my sig.

4x4 is for x99 quad channel mobos
2x8 is for z170 dual channel mobos. 
 
if you run dual channel ram in a quad channel mobo then you'll miss out on memory bandwidth.
if you run quad channel in a dual channel mobo then it'll be the same performance except without the extra slots for future upgrade.