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theprof00 on 26 November 2014
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ICStats said:
theprof00 said:
ICStats said:


Right.  They have a gigantic fan.  But it's not the only reason.

- The XB1 has a lot more vent space than PS4 so there is more air getting to the fan.  PS4 runs at higher air pressure / speed needed through the vents.
- No heat from the power supply in the box.

I asked you to prove to me that open spaces (within a shell) means quieter.
PS4 is louder because it uses a smaller, higher-powered fan. More rpms means more 'whine'. This is all case-building 101.
a larger fan runs at much fewer rpms to provide the same cooling. Number of vents or air pressure makes no difference because the important part of that equation is that none of those vents are facing you.
Sound travels in the air, so if air was vented toward the player, then yes, higher air pressure would result in the internal sound getting to the player more consistently. But ps4 vents out the back at a downwards angle, and xb1 vents from all sides.
Regardless, I'd be more inclined to think that more space in a shell provides more acoustic resonance = amplified sound.

You didn't ask me to prove anything if I racall .

Again, I agree larger fans are quieter because they displace more air at a lower RPM.  But this is only part of the equation.

1) If you cover up most of your PC's vents then internal temperature will rise, temperature differential between heat sync and air drops, and the fan will need to operate at RPM to get the same cooling.  This should be obvious heat dissipation physics.
2) Smaller vents require higher pressure (so higher RPM) to achieve the same air flow.  This is also obvious physics.  In layman's terms it's the difference between breathing through your mouth and breathing through a straw.  It takes much higher pressure to breathe at the same speed.  PC form factors usually have plenty of ventilation so this is a small issue.  Xbox one has ventilation on the top surface and sides, while PS4 mostly on the back.  It has a bigger mouth, so to speak.
3) XB1's vents all over the top and sides give it more space to dissipate heat around it, so it fares better in an enclosure.  Again what I was mentioning is my XB1 is happy in my cabinet all the time, but PS4 is not at all.  PS4 runs much more quietly outside with clear space around it's rear vents.

"I'd have to see some proof of that." xD
1) yeah but I don't know what you're even referring to. You make an metaphor of something that doesn't even apply?
2) ACtually, higher rpm isn't needed to produce the same airflow, physics dictate that the same amount of force through a smaller opening would create more air pressure. You're near to your point, but you're off in saying it takes "more air pressure to breathe at the same speed". That's not true. Air pressure is air pressure. There doesn't need to be another force at all. Just, like, a balloon. But yeah, it has a bigger mouth. However, again, that doesn't relate at all to the open space within the console, that's just about the vents. I completely agree that more vents helps airflow and air pressure, but you said that more space meant quieter.
3) That is because ps4 is meant to have a vented area behind it, and below, for example, against the wall on a shelf where it pushes the air down and behind, which follows exactly with the cords. If you have a ps4 in a media center, then that air is going to push around the base and back and run hotter because the airflow hits the same spot repeatedly, which increases cumulative heat.

Again, this doesn't relate to quieter.
I'll say again that a smaller fan has to run at a higher rpm than a larger fan. This creates "whine". This makes the ps4 fan louder. Nothing to do with vents or internal space. Furthermore, ps4 runs hotter just on basis of having higher clockspeed.

Just read your edit.
Again, yes that's true. However, it doesn't relate at all to the point I originally argued. This is called a strawman. I argued an earlier point and you've changed it into a new point and are arguing this other point that I've not disagreed with. I don't want to argue about air pressure from the vents, and I never have and never did. I agree that more vents are better.