Originally Posted by Mopar63
Great piece, my recent experience with the Silvertsone TJ08-E has made me rethink some things. I found that the single Penetrator fan at the front does an amazing job cooling for me. When compared to a build that uses dual Noctua 120 front and top for intake and then a 150 for exhaust vs the single 180 at the front with a 120 through a radiator for exhaust the Silverstone case gave better system temps by about 8C, this really amazed me. The CPU and GPU temps where within about 2C of the other case setup.
Was this due to the penertrators directed airflow and the case layout soley? I mean I was getting a ton more air into the case with the other setup.
Simply because they aren't noctuas. Yes they're low noise and everything but they are low static pressure fans and also low CFM
But also, directed does really help component airflow as what we want is airflow NOT airBLOW
With fans that have stator air foils their airflow pattern is very straight unlike one without a air foil behind a filter
Originally Posted by deepor
It was probably both. Did you know why they chose that directed air flow fan? There's something happening if you have a filter in front of a normal fan. The air will shoot out to the sides behind the fan for some reason, instead of flowing into the empty room directly behind the fan.
That's probably not important if you don't even expect that air to go directly to the CPU cooler in a normal case. You'll have intake fans at the front bottom and bottom. You just want cool air to get into the case and exhaust spent air at the top back. Perhaps in a normal case, the pressure part of a fan's spec gets used up because the air is not moving in a direct, short path.
In the TJ08, they wanted it to flow directly to the back exhaust and they perforated all the metal there. If the air is already flowing in the right direction, this might help with the fan getting closer to its air flow rating and getting more out of its pressure rating. A CPU tower cooler's fan will also add to it.
Higher static pressure also helps. The reason is because of how air flows, if your fans are very very close to a filter/HDD the fan will attempt to pull the air through the center where all the static pressure is building up therefore forming a cone and causing a situation where air just goes all over the place. That is why you see servers using fans with air foils, like FFB fans have better thermal performance than those without (despite being louder for a given CFM)
And well a fan's "pressure part" is just the rating for how much restriction it can overcome. Fans don't pressurize air, they aren't force induction devices