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30Valve

PSU with Front Intake

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Posted · Original PosterOP

I want to build into an old Alienware Predator 2 case that has the old, now unorthodox, power supply placement at the top of the case. Problem is that the top of the case is closed and directly beneath the PSU is the CPU cooler, so a typical power supply with a side intake would choke or overheat. The OE PSU is one of those that intakes air from the front. Are there modern power supplies with this layout? Is there some keyword I'm missing when searching for one?

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Posted · Original PosterOP
13 hours ago, 191x7 said:

Just make the rear fan intake and there won't be any problems.

 

Would that cause an issue with heat soak? If the PSU is exhausting hot air, the rear intake would pull some of that air back into the case, reducing the efficiency of the CPU cooler and getting drawn back into the PSU, causing that air to cycle and continue to get hotter.

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11 minutes ago, 30Valve said:

 

Would that cause an issue with heat soak? If the PSU is exhausting hot air, the rear intake would pull some of that air back into the case, reducing the efficiency of the CPU cooler and getting drawn back into the PSU, causing that air to cycle and continue to get hotter.

Rear fan needs to be an exhaust, the PSU will just act as a second exhaust.

 

Just mount the PSU as normal an do not worry about it.  Air from the CPU heatsink will not be a problem for the PSU.  The PSU will run a little hotter, but that air will still be cooler than the PSU components and will still cool them.

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39 minutes ago, 30Valve said:

 

Would that cause an issue with heat soak? If the PSU is exhausting hot air, the rear intake would pull some of that air back into the case, reducing the efficiency of the CPU cooler and getting drawn back into the PSU, causing that air to cycle and continue to get hotter.

You forgot to take into account that warm air rises.

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1 minute ago, 191x7 said:

You forgot to take into account that warm air rises.

Which makes less than a 1% impact when you introduce a fan.  Warm air rising is only worth mentioning when you are implementing a passively cooled PC.

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