Well the results are a little inconclusive.
I really can't tell if the fans have made THAT much difference.
I started off running an IBT 5 pass to get a base level with my Apache's. I am using a relatively aggressive fan profile by default, but then again I can because those Apache's are pretty much silent at full whack.
Fan Control: My Aggressive Custom
Ramp Start: 28
Full Fan: 35
Room Ambient: 25.5
(how hot the room is according my basic mercury thermometer)
Idle Coolant: 35
(the temperature the coolant is reported as according to the Antec software)
Idle Max
(left alone for 10 minutes what was the max idle temperature recorded - note this is after a reboot and allowed to settle for a few minutes before being measured)
C1: 42
C2: 37
C3: 29
C4: 38
Idle Normal: 36 [package]
(human, me, watching the temps and taking an approximate average - take with a pinch of salt)
C1: 34
C2: 32
C3: 27
C4: 32
IBT Coolant: 42
(average coolant temperature during an IBT run - watched by me, but it doesn't change very much or very fast so it's quite a safe reading)
IBT Max
(max temps of run as reported by hardware monitor and coretemp)
C1: 68
C2: 73
C3: 70
C4: 75
IBT Normal: 60 [package]
(human, me, watching the temps and taking an approximate average - take with a pinch of salt)
C1: 59
C2: 59
C3: 56
C4: 60
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Next up a 1 pass IBT (I didn't like the temps so I stopped the 5 pass and re-ran it as 1) with the default custom fan profile.
Fan Control: Default Custom
Ramp Start: 40
Full Fan: 50
Room Ambient: 26.5
Idle Coolant: 38
Idle Max
C1: 43
C2: 40
C3: 34
C4: 43
Idle Normal: 41 [package]
C1: 40
C2: 37
C3: 31
C4: 37
IBT Coolant: 45
IBT Max
C1: 73
C2: 78
C3: 76
C4: 77
IBT Normal: 77 [package]
C1: 70
C2: 76
C3: 73
C4: 77
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Next up I decided to give my case it's 6 monthly clean. So I took it outside and blew it all out with the compressor...lots of dust came out.
At this point the Apache's are still in and as with all the tests other than the first, it's a 1 pass IBT at maximum.
Fan Control: Default Custom
Ramp Start: 40
Full Fan: 50
Room Ambient: 26.7
Idle Coolant: 35
Idle Max
C1: 40
C2: 46
C3: 30
C4: 37
Idle Normal: 40 [package]
C1: 40
C2: 35
C3: 30
C4: 35
IBT Coolant: 44
IBT Max
C1: 68
C2: 76
C3: 72
C4: 75
IBT Normal: 75 [package]
C1: 67
C2: 74
C3: 75
C4: 76
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At this point I fitted the new fans. First off the construction is brilliant, you can tell that they are a more expensive fan than the Apache's the moment you open the box. A nice addition is the inclusion of rubber to help deaden the vibrations.
Fan Control: Default Custom
Ramp Start: 40
Full Fan: 50
Room Ambient: 28.0
Idle Coolant: 37
Idle Max
C1: 41
C2: 40
C3: 32
C4: 38
Idle Normal: 39 [package]
C1: 39
C2: 35
C3: 31
C4: 36
IBT Coolant: 45
IBT Max
C1: 68
C2: 74
C3: 76
C4: 75
IBT Normal: 71 [package]
C1: 67
C2: 73
C3: 71
C4: 74
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The final test, but this time with a more aggressive fan profile. This is likely to be the one I will use day to day.
I prefer more aggressive profiles as I believe that it's better to get in earlier with the cooling and try and keep the temperature down, opposed to trying to bring it down later from a higher value.
Fan Control: My New Aggressive Custom
Ramp Start: 30
Full Fan: 40
Room Ambient: 28.0
Idle Coolant: 36
Idle Max
C1: 41
C2: 40
C3: 32
C4: 38
Idle Normal: 37 [package]
C1: 37
C2: 35
C3: 30
C4: 36
IBT Coolant: 41
IBT Max
C1: 64
C2: 70
C3: 68
C4: 70
IBT Normal: 72 [package]
C1: 64
C2: 69
C3: 67
C4: 68
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Conclusion
It's difficult to really summarise these results as the ambient temperature was rising during the whole testing. That alone pretty much makes the testing nulled, but maybe we can get some educated guesses out of it based on what we didn't see.
- The aggressive profile, both the first and the last, helped during IBT. During normal operations it's also probably going to be helpful to subdue those spikes.
- Cleaning the dust out helps quite a lot and is something maybe we should be doing before replacing our fans
I didn't think mine would have got as bad as it had in 6 months.
- If you already own the Apache's I can't really recommend these fans based on this evidence - I will test again tomorrow morning though when hopefully the ambient temperature is lower.
- Maybe the results we are seeing here aren't being limited by the fans, but instead by the 920. Maybe we are altering a few percentile of operational performance at the outer edge, but we may be at the Kuhler's maximum in these temperatures.
For completeness I have a Haf X with the following cooling additional to the 2 120mm fans on the Kuhler:
Front: 230*30 mm fan
Top: 200*30 mm fan *2
Side: 200*30 mm fan
VGA duct: 120*25 fan
I have an i5 2500k overclocked to 4.5Ghz.
My PSU intakes and expels it's air to and from the outside of the case.
I have a 480 SOC GPU with the windforce fans on, it wasn't being taxed during these tests but was running between 40-45 degrees at idle.
I have 4 WD greens and an SSD behind the main 230mm intake fan at the front of the PC. Most of these hard drives would have been asleep and if not, would not have been very active as I was only running these tests and nothing else.