Optional Fan Setup

here is idle info

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Front and bottom intake, top exhaust. Leave the rear exhaust unplugged. We want filtered air intake potential to be greater than radiator exhaust potential .. this means extra airflow from intakes will leak out unused / unfiltered venting, instead of leaking in and bringing dust in with it.
 
It also means hot air wont be exhausted and will heat components within the case.

Its always a trade off, I would leave the rear exhaust running but at a lower RPM than intakes so as to expel air from the VRM area and CPU fan
 
ok so keep fans where they are now except move rad to top and top fan to front, if I disconnect the rear fan I'll have 2 intakes and 2 exhaust, which wasn't ideal
 
Relentless81 said:
It also means hot air wont be exhausted and will heat components within the case.

Its always a trade off, I would leave the rear exhaust running but at a lower RPM than intakes so as to expel air from the VRM area and CPU fan
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The underlined part of your post is not true. Having no back exhaust fan does not mean that at all.

Cases to not have to use both intake and exhaust of case .. just like a CPU cooler does not have ot have a fan on the back of it to match the front it's fin pack .. or a radiator does not require both push and pull fans. For a case similar airflow areas (vent areas) are needed for flow to equalize at it's maximum rate.

Using only intake fans on all filtered vents and not fans on back and top unfiltered vents means the intake fans push the air all the way through the case.

The reason for not using the rear exhaust fan was explained .. but I will explain in more detail. To keep dusty air from being drawn in unfiltered vents and holes and causing dust to collect inside of the case the intake fans need to be moving slightlymore air into case then the exhaust fans are removing from case and the slightly more intake airflow will then flow out vents with no fans and/or other holes in the case instead of drawing dust in through them.

PAULRYAN52 said:
ok so keep fans where they are now except move rad to top and top fan to front, if I disconnect the rear fan I'll have 2 intakes and 2 exhaust, which wasn't ideal
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For the reason I explained above you want a little more intake fan flow potential than exhaust fan flow potential. This is not just the number of fans but how much airflow they hve after they overcome the resistance they are working against. Generally speaking front intakes with filters are quite restrictive .. almost as restrictive as radiators. ;)
 
Its not worth getting into an extensive debate over because there are far to many variables however my own testing in a 540 air with ceiling mounted rad proved at least in that particular setup that a rear mounted exhaust kept the VRM's cooler under load

With an air cooler two exhausts, one at the rear and one in the ceiling at the rear kept the CPU and VRM temps lower than just the one rear mounted exhaust

I found that running the front intakes at a higher RPM than the exhaust/s in both configurations maintained better temps with decent positive pressure
 
ok I understand that, what I don't understand is if I set up as suggested then surely there would be more exhausted air than intake as tha case has dust filters at the front as well as a door
 
PAULRYAN52 said:
ok I understand that, what I don't understand is if I set up as suggested then surely there would be more exhausted air than intake as tha case has dust filters at the front as well as a door
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Exactly!
Your case came with 2x SilentWings 3 front intakes and 1x SilentWings 3 back exhaust. I think it will support up to 3x 140mm front fans and 2x bottom fans. What fans do you now have?

I'm guessing that 2x 140mm front and 1x 140 bottom intake fans will flow more air into case than the 2x 140mm radiator fan will exhaust from case. Watch component temps, especially under extreme load to be sure they are not running too hot. I'm guessing they will not be, but if something is running too warm we can figure it out. ;)
 
I'm assuming the SW3 are 140mm? That should work fine. The bottom in is supplying cool airflow to your GPU. The top and back exhaust should be moving less air out of case than the 2x radator and bottom intakes are moving in.

If you move the radiator to the top move the back and top exhaust fans you now have to the front as intake. This will give you 2x front and 1x bottom intakes withe the radiator's 2x 140mm exhaust.

The Silent Loop 280 radiator is not a high restriction to airflow. Probably similar to bottom, front and top case vents.

Silent Wings 3 (case fans) are rated 59.5cfm free airflow and 1.08mm H2O at 1000rpm.

Silent Loop 280mm fans are rated 94.2cfm free airflow and 1.82mm H2O at 1600rpm.

This means if radiator fans are spinning 25-33% faster than case fans (front resistance + radiator resistance) your case should have a slightly more intake potential than exhaust.
This means if all fans are running at similar speeds your case should have slightly more intake potential than exhaust with radiator in the top.

Easy ways to check is to use a cigarette or incense stick smoke placed near other vents (like PCIe back slot covers) and watch to see which way the smoke moves .. toward and into case or away from case. ;)
 
thanks so if/when we move rad to top, move the fans currently are top and rear to the front as intake, is that correct, sorry for pestering you just trying to set up my pc the best way for cooling
 
That is what I would do. That and smoke test the back when CPU and/or GPU is working hard like stress testing CPU / GPU or GPU when gaming to see if smoke goes in or moves away from vents ;)
 
Much better temps
Below is the differences from what you posted in post #20 to now starting with CPU temp
- 6c
- 6c
- 4c
- 2c
- 5c
- 12c
+ 6w
- 0.22w
+ 2.36w​
 
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Told you it would be better with the rad in the roof. That's a 12 degree drop on the motherboard vrm's alone due to cooler air going over them and the radiator fans being on top of them. Good result.
 
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