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Second followup to the airflow mod

Mira Yurizaki

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I had two burning questions in my head:

  • What happens if the fan is pointing down?
  • Are the intake fans creating much of a difference?

The new configs are:

  • Intake at 30% with the other fans at a custom fan curve
  • Fan pointing down, not running CAM
  • Fan pointing down, running with CAM at 50% fans

So here's all the data compiled. Regarding the charts, instead of using maximum clock speed (which all of them were within 1% of each other), I used maximum temperature instead which is a far more useful statistic. I also found a better way to represent the performance cap data. Instead of showing bars and counts, the counts are normalized to 100% and all of the performance cap reasons take a chunk of this. This makes it much easier to visualize how often the GPU spent in that reason.

 

Spoiler alert: Running with the fan pointing down without CAM running performed the worst, even running into Thermal performance caps. However, using CAM to turn the fans on to 50% seemed to help a lot. The 30% intake fans performed very well. Which makes me wonder if this is just a problem with air circulation within the case rather than a problem of trying to push air in.

 

Why bother with gathering this data?

One could think that this affects just my configuration, but I think it affects any micro-ATX case with a tempered glass side panel and a PSU shroud. If anything, the results from this data gathering could be generalized for other people who want to tweak with getting the best cooling performance.

 

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image.png.346b05e92fa81817a1ac76e61cbac488.png

 

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3 Comments


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Since your Intake fans are also your RAD fans for your X(6?)2, what do they normally run at while idle with the CPU not under load?

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My radiator fan curve is set to 30% if the CPU is under 40C, but tops out at 50% at 50C. The CPU rarely gets above 50C though.

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I'm also starting to think now that I've found a better way to measure how cooling performance affects PerfCap reasons, we could start adding that to performance metrics. 🤔

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