Overclocking 5820k with a low budget fan cooler.

Dude, the evo is on sale right now...http://www.newegg.com/Product/Product.aspx?Item=N82E16835103099&cm_re=cooler_master_cpu_cooler-_-35-103-099-_-Product ($29.99)

What motherboard?

The Turbo Boost is already 3.6Ghz so, I'm sure you could get at least another .2 out of it.

I've got a 4670K at 4.0Ghz just using the on click overclock feature of my motherboard and a Coolermaster V8 cooler
 

Lag

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Well, the specifications suggests that this cooler supports the sandy bridge 2011 platform, not Haswell-E. If you absolutely have to pair it with a cheap air cooler, I would suggest the Cooler master 212 EVO. My friend has this CPU and cooler combo, but it isn't good enough for any OC (in a fractal Define R5 case). But if you have case with good ventilation, you might be able to mildly OC the CPU. But I would personally hold off until you can afford proper cooling. In the meantime, the 212 EVO is a good purchase until you can afford something like the noctua NH-D14 or a Corsair h100i CLC.

Edit: I saw the previous post with about your mothboard, what case will you be using? Is there a reason why you are going with ITX?

As previous posters have said, you will have a hard time finding a cooler because of the ILM socket, so your OC capability is going to be limited.
 

cheese9k

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In this case, your only options will be that included fan or an 120mm AIO liquid cooler. I wouldn't do any overclocking with that stock fan though, unless you want to kill your system.
 

japjeev

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Now I have a dilemma b/c I build either this machine or a Skylake machine, I don't know what will be better for my needs here is my thread for that http://www.tomshardware.com/answers/id-2820017/haswell-5820k-skylake-6700k-stock-speeds.html