I don’t have any fancy graphs but I’ve done a bunch of fan tests since I built my a4 3-4 weeks ago. My system: 5600x with noctua lh-9a, 3070 fe. Options I tried:Yeah no biggie.
Just had some spare time between my exams so I did a quick test to change the direction of the fan under the PSU. Just did a simple stress test with Heaven and recorded the temperature with HWInfo64.
Initial impression is that with the PSU fan flipped, the GPU runs about the same but also with 100-300 more RPM. I don't have the equipment for audio levels but it was also significantly louder.
The CPU side panels around the bottom fan area were also quite warm to the touch, possibly due to the heat build-up by the intake fan.
The preliminary conclusion is that leaving the fan as exhaust is better, and considering the result I'm not sure if it's worth it to do further testings. But I'm quite inexperienced with testing hardware and using HWInfo(as you can see from my janky graph) so my experiment is not quite set up right and there could be errors.
- sfx-l psu, flipped psu. Mobo fan exhaust, no psu fan
- sfx-l psu, normal psu orientation. Mobo fan exhaust, no psu fan.
- same as previous one + gpu riser standoff
- same as previous one but sfx psu
- same as previous one + intake under psu
- same as previous one but exhaust under psu
I got the best performance overall with the last one (sfx psu, normal position. Both fans as exhaust. Gpu standoff)