Proper Cooling For i7-8700k (Mini itx case)

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In a month and a half I'll be upgrading my CPU to a i7-8700k along with a new motherboard.
Current PC components with new cpu/motherboard: https://pcpartpicker.com/list/PYPxkd

My current CPU fan is a cryorig C7, which won't be close enough to cool the i7. I've been looking at 120mm/140mm AIO as a cooling option. People claim that this size can't handle OC, but they never say if its light, moderate, or heavy OC.

My question is will a 120mm/140mm AIO be enough for stock to a light OC? I'm new to the whole water cooling/OC so any explanation will go a long way.

I know this case isn't the best for large AIO and an i7 is overkill but this PC is meant to be extremely portable (LAN parties, VR, parties, and emulators) and I'm trying to future proof it. Yes RGB is worthless to some but I enjoy it. Thanks in advance.

 

[chemmajorp53]

If you can fit a Noctua NH-L12 in there then you're golden, I'd imagine it fits but you'd have to check. Otherwise the AIO is the best cooling option sadly. You MIGHT be able to get away with the cryorig at stock for gaming especially if you're playing esports titles that don't actually push the cpu, it won't be able to deal with prime95 but that's kind of unrealistic anyways.

EDIT: also for what it's worth, I feel like the extra few dollars spent on an EVGA 550W G3 or a Seasonic 550W focus gold unit would be worth the money just for the extra efficiency and possibly lower noise, but it's your decision.

 

[WildCard999]

Don't underestimate the Cryorig C7, it's quite the capable little cooler and I would try it first before considering a AIO.

 

[mortemas]

I have an 8700k with a mini-itx and an AIO 120mm. Here's my parts list from a year ago: https://pcpartpicker.com/user/mortemas/saved/. I've upgraded the gpu since then, and I didn't use 1 of the slim 120mm fans. I don't recommend the case, since I didn't like the airflow and felt compelled to extensively mod it by cutting most of the stock grills out and installing wire frame grills for better airflow. My cpu is not overclocked. Idle cpu temp is 33c, Prime95 gets it up to around 75c and gaming usually doesn't make it go higher than 55c. I have a 2080 ti in there and it got to 75c max with the factory overclock and the boost clock hit a max of 1920 MHz. I put a thermal limit on the gpu at 70c because currently it meets my needs as is and my place is actually hotter in winter than summer because we don't have control of the heat in the building! I don't really worry about the cpu temp as much as the gpu. So, if my usage matches what you've got in mind then 120 or 140 AIO should be fine.