280mm radiator in three 120mm fan bay?

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hailharkzounds

Jul 5, 2018
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I have an old Cosmos S case, which has a top bay for three 120mm fans.

In attempting to upgrade my system, I ordered a CORSAIR HYDRO SERIES H115i PRO RGB AIO Liquid CPU Cooler, 280mm Radiator, Dual 140mm ML Series PWM Fans.

There is plenty of room for the cooler but the predrilled mounting holes on the case and those on the cooler do not align.

Does anyone know of a bracket or adapter(s) which might simplify mounting this configuration?

Any suggestions would be appreciated.
 
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drea.drechsler

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Oct 16, 2017
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I highly doubt there is an adapter for such a unique special-use case as this. But maybe someone will suggest something... be interesting.

But can't you carefully measure and drill some mounting holes that align with those on the cooler? It seems a truly simple mod. One suggestion is to plan on using at least one of the existing holes then place masking tape over the general area(s) to drill for the new ones, then measure and mark the locations on the tape using the one you picked as a reference. You can easily center punch the mark with a nail but even the tape alone will help keep the drill bit centered until it 'bites'.




 
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drea.drechsler

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Oct 16, 2017
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Oh yeah...now that brings what you're doing into focus.

Either way is highly sub-optimal however as it's essentially mounting 140mm fans over 120mm blow holes thereby blocking 20mm of outer blade surface area. I have to think this will seriously compromise airflow through the radiator which AIO's depend heavily on for cooling performance. I can also see an increase in noise if blade tip turbulence is interfered (depends on how it gets mounted I suppose) and the fans have to operate faster at even moderate processing loads to provide the same cooling performance. And it will thermally saturate sooner at high processing loads.

If you want true 280mm performance that's quiet then make sure as much material blocking the radiator as possible is removed.... in the case and those adapters if used.... using a Dremel or a tin nipper. If you can't do this I'd really suggest a 240mm AIO that fits may do the job for you better, or even a 360mm if you can.

Good Luck

 
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