There is a common misconception that AIO coolers are the answer to overclocking needs. In many cases, this is a COMPLETE falsehood. allow me to expound:
1) haswell runs hot - hotter than Ivy. Most AIOs were designed for Ivy needs and have not been updated for higher temps needs of haswell.
2) Even Martinlabs and Anatech have runs comparisons and shown that most popular AIOs (read as Corsair H110 and Swiftech H220 as well as others) show no conclusive benefit over high end air coolers such as Noctua UH-14s, Phantek TCPE14, Thermalright Silver Arrow Extreme and the like. They are glorified air coolers.Not to be confused at all with the capabilities of a proper custom loop.
3) OC to that range MIGHT be possible on one of the higher end AIOs i mentioned above. Advantage of the H220 is the expandability. But at that point... why not build a proper custom loop in the first placve anyway? CPU only loop can easily be built for $250-300USD with quality performance parts. And if you want the comparison of low end parts, it can be done for $175-200, but then you are back in performance and reliability range of an AIO...
Bottom line... if you want quiet, watercooling is your answer. If you want performance AND quiet, custom loop is your answer. an H110 and swiftech H220 on full blast raise a hell a racket, and will barely keep up with a full load OC at 4.3. So decide what you really want out of this - then decide which way to go.
Lastly... for true silent watercooling, over radding is how it is done!!! double to triple rad capacity using very low speed fans or even no fans (passive cooling) You can easily build a 35dB (45-50dB is considered normal conversation 3ft apart) water cooling loop with quality parts that will handle 4.5 (or even higher) no problem for $300-350USD cpu only. want to cool your GPU too? Ok, for block and fittings and tubing to add it in add another 100-150USD - and TADA!!! quiet performance machine!!!
One added thought... FAN CONTROLLER!!!! Obviously built into AIOs usually, but in custom loops they are a must to make dead silent running... and so dang easy to turn a knob or flip a switch and have full fan power available when you need, quiet when you don't... 10-30USD easy
Edited by Buzz247 - 1/16/14 at 1:16am