Ivy bridge run hot when OC, so if you are going for a high OC, i would go with water. For a mid OC, like 4.0ghz i think the circuity will be fine as you wont be pushing it too much.
4GHz is a mild over-clock that you will hit at stock voltage unless you are extremely unlucky.
The main improvement in IB has to do with the graphics. If you are overclocking, you are probably using a video card as well. Why use IB then?
The irony is that if you have a discrete GPU, which is usually utilised for gaming, over-clocking an Intel CPU will rarely give you a meaningful gain whilst gaming. They are separate issues although gamers often over-clock anyway. In other words there are plenty of good reasons to over-clock a CPU which are usually not related to gaming.
I think the issue of Ivy Bridge overclocking and the heat it generates has been misunderstood. At an Ivy Bridge launch event that I attended there was an Intel sponsored professional overclocker who led a session on Ivy Bridge overclocking. This issue of Ivy Bridge temperatures was raised with him. What he said was that Ivy Bridge processors are more powerful, clock for clock, than Sandy Bridge. With the i7 3770K this improved performance was estimated by him to be worth around 400-500Mhz. What was meant by this was that if you took say the Sandy Bridge 2700K and the Ivy Bridge 3700K, both are 3.5Ghz processors. Overclock the 3700K to 4Ghz and this is the equivalent of overclocking the 2700K to 4.4/4.5GHz, the 3700K at 4.5Ghz equals the 2700K at 4.9/5Ghz and so on.
Overclockers are often more concerned with clock speed than actual performance which makes IB very uninteresting to them even if it is able to match or beat it in performance terms.
Considering this is Silentpcreview I suggest to buy a tower cooler and overclock "just enough". Nobody should worry about the last 1% performance if that makes the CPU 10C hotter. Ivy should overclock easily to 4,0GHz with a good tower cooler like Macho HR-02. Just keep the voltage as low as possible.
Exactly, don’t chase the last 5% or so; 1% is off the mark. At stock voltage it seems to over-clock very well according to the review below. Intel CPUs will usually give you a 20% or more over-clock at stock voltage so 4GHz is very conservative.
I think IB has a very decent power efficiency gain for silent computing lovers that like to keep the voltage at or near stock. So many people make blanket observations without considering that other people have different priorities. http://www.anandtech.com/show/5763/unde ... ivy-bridge