I'm planning to overclock my 4770K up to 4.6 - 4.8GHz, so should I get a thick 240mm rad, slim 280mm rad or a 360 rad?
Can you fit a thick 360? if so then grab something like an XSPC RX360, I personally would go with a thicker 240 than a thinner 280 but if it looks like you will have clearance issues with anything than there is nothing wrong with a 280.
Best of luck trying to keep that haswell cool. I think even the best of loops around would have trouble keeping the intel molten lava core at bay.
You need to look at the total surfaec area of the rad, the largest will have the greatest cooling.
For example the thick 240 will have a greater cooling than a slim 280.
A slim/regular 360 will have equal or greater cooling than a 240 thick.
A Thick 360 will just demolish all the above.
If your case can support it, get a thick 360. like the RX360 that deejeta suggested.
If your planning on OCing the Mightly volcano Haswell you may wish to consider de-lidding the CPU for that bit extra performance.
I was thinking of the NZXT Switch 810/ H630. Will it fit?
I'd get the NZXT Switch 810 and a 360mm rad. According to this forum http://www.techspot.com/community/topics/the-watercooling-guide-from-a-to-z.180876/ a switch will fit a 70mm thick 420mm rad(fans up top).
A switch 810. Yay! It'll be the best thing you ever do case wise ever! I love my 810.
Throw a thick 360 in the top, thick 240 in the bottom, plus you can also fit a rear 120 (if you plan it right) and a 140 on the hdd cage.
the XSPC RX240 rad is enough to keep that CPU cool. its around 60mm thick.
you wont see that big of a performance increase going to a bigger rad because the thermal compound intel uses on ivy bridge and haswell CPUs is pretty crap and wont be able to dissipate heat that well.
a good option to look into is delidding the CPU and reapplying the thermal paste with a better quality one like Liquid Pro.
I delidding my i7 3770K and used liquid pro and managed to lower my temps by about 15-20 degreesC @ 4.5ghz.
heres a vid on how to delid:
I saw a video about the Phantom 630 and I really liked the interior because there's a modular HDD cage system, and there's SSD mounts in the back. The only reason why I don't dig it is because of the small window. Can the HDD cages be repositioned a little closer to the PSU? I'd like to mount a RAD in the front for push pull.
Well Linus uses isopropryl alcohol to remove thermal paste off a CPU. Why would I need aftermarket thermal paste? I didn't pay $70 for a waterblock with cheap thermal paste.
its not the thermal paste on the outside thats of any concern. its the thermal paste that intel uses inside the IHS that directly contacts the silicon.
you'll find a massive spike in temps under 100% load and you'll probably not be able to do much about that even with extra rads.