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Can Atom D525 cpu be run without a fan?


tboooe
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I've been using an old Acer Aspire Revo R3700 htpc as my control pc in my 2 pc setup. Since I don't convert to dsd or do room correction this little pc does everything I need. I contemplated building a CAPS to replace this so I can tweak more things. However before I go that route I want to mess around with this old htpc and experiment a bit. One thing I want to try is removing the fan. Even though it is actually very quiet I want to see if removing it will help reduce any electrical noise in my system.

 

So does anyone know if an Atom cpu can be run without a fan? If so, do I need to make any provisions? The case its in right now is plastic so I don't think adding heat pipes will do any good. Are there other options for passive cooling if I need it?

12TB NAS >> i7-6700 Server/Control PC >> i3-5015u NAA >> Singxer SU-1 DDC (modded) >> Holo Spring L3 DAC >> Accustic Arts Power 1 int amp >> Sonus Faber Guaneri Evolution speakers + REL T/5i sub (x2)

 

Other components:

UpTone Audio LPS1.2/IsoRegen, Fiber Switch and FMC, Windows Server 2016 OS, Audiophile Optimizer 3.0, Fidelizer Pro 6, HQ Player, Roonserver, PS Audio P3 AC regenerator, HDPlex 400W ATX & 200W Linear PSU, Light Harmonic Lightspeed Split USB cable, Synergistic Research Tungsten AC power cords, Tara Labs The One speaker cables, Tara Labs The Two Extended with HFX Station IC, Oyaide R1 outlets, Stillpoints Ultra Mini footers, Hi-Fi Tuning fuses, Vicoustic/RealTraps/GIK room treatments

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There are (were) several fanless D525 motherboards available so yes, given a suitable heat sink it should work.

Eloise

---

...in my opinion / experience...

While I agree "Everything may matter" working out what actually affects the sound is a trickier thing.

And I agree "Trust your ears" but equally don't allow them to fool you - trust them with a bit of skepticism.

keep your mind open... But mind your brain doesn't fall out.

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Thank You for the reply. My problem is how to decide what a suitable heat sink is? I really don't want to do trial and error because an error will most likely result in me frying the cpu.

12TB NAS >> i7-6700 Server/Control PC >> i3-5015u NAA >> Singxer SU-1 DDC (modded) >> Holo Spring L3 DAC >> Accustic Arts Power 1 int amp >> Sonus Faber Guaneri Evolution speakers + REL T/5i sub (x2)

 

Other components:

UpTone Audio LPS1.2/IsoRegen, Fiber Switch and FMC, Windows Server 2016 OS, Audiophile Optimizer 3.0, Fidelizer Pro 6, HQ Player, Roonserver, PS Audio P3 AC regenerator, HDPlex 400W ATX & 200W Linear PSU, Light Harmonic Lightspeed Split USB cable, Synergistic Research Tungsten AC power cords, Tara Labs The One speaker cables, Tara Labs The Two Extended with HFX Station IC, Oyaide R1 outlets, Stillpoints Ultra Mini footers, Hi-Fi Tuning fuses, Vicoustic/RealTraps/GIK room treatments

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Your processor will not get fried, it goes into halt state when the temperature exceeds a certain limit. On some main boards you can even adjust this temperature limit.

 

What are the dimensions of the heat sink underneath the processor fan? And could you leave the top off the plastic enclosure? Your processor has a TDP of 13W. I'm running a J1800 processor with 10W TDP with the built-in heat sink of probably 90x90 mm (or 3.5 in) in an unventilated enclosure without any problems. Power management is set to 'performance'.

Primary ::= Nabla music server | Mutec MC-3+USB w/ Temex LPFRS-01 RB clock | WLM Gamma Reference DAC; Secondary ::= Nabla music server | WaveIO | PrismSound Lyra

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Thank you. It looks like the built in heatsink (its actually just a flat piece of metal with some small fins) underneath the fan is about half the size of an SSD, Yes, I can definitely remove the top cover as you can see of a similar HTPC below. Maybe I can get away with adding a heatsink on top the original one?

 

Here is a pic of the Nvidia GPU and Atom CPU

clip_image026.jpg

 

Here is a pic of the heatsink for both

clip_image034.jpg

 

Here is image with the heatsink and fan

clip_image036.jpg

 

 

 

Your processor will not get fried, it goes into halt state when the temperature exceeds a certain limit. On some main boards you can even adjust this temperature limit.

 

What are the dimensions of the heat sink underneath the processor fan? And could you leave the top off the plastic enclosure? Your processor has a TDP of 13W. I'm running a J1800 processor with 10W TDP with the built-in heat sink of probably 90x90 mm (or 3.5 in) in an unventilated enclosure without any problems. Power management is set to 'performance'.

12TB NAS >> i7-6700 Server/Control PC >> i3-5015u NAA >> Singxer SU-1 DDC (modded) >> Holo Spring L3 DAC >> Accustic Arts Power 1 int amp >> Sonus Faber Guaneri Evolution speakers + REL T/5i sub (x2)

 

Other components:

UpTone Audio LPS1.2/IsoRegen, Fiber Switch and FMC, Windows Server 2016 OS, Audiophile Optimizer 3.0, Fidelizer Pro 6, HQ Player, Roonserver, PS Audio P3 AC regenerator, HDPlex 400W ATX & 200W Linear PSU, Light Harmonic Lightspeed Split USB cable, Synergistic Research Tungsten AC power cords, Tara Labs The One speaker cables, Tara Labs The Two Extended with HFX Station IC, Oyaide R1 outlets, Stillpoints Ultra Mini footers, Hi-Fi Tuning fuses, Vicoustic/RealTraps/GIK room treatments

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Run it without the fan & the top removed. The BIOS should have an option to monitor system parameters, including processor and ambient temperature. If this gets too hot, add an external heat sink - since you have a (nearly) flat surface, this should be fairly easy. The maximum junction temperature for this processor is 100 °C.

Primary ::= Nabla music server | Mutec MC-3+USB w/ Temex LPFRS-01 RB clock | WLM Gamma Reference DAC; Secondary ::= Nabla music server | WaveIO | PrismSound Lyra

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Well I took off the cover and disconnected the fan. Everything seemed to work with the CPU usage around 3% when streaming music which is normal. For some reason the amount of power the HTPC drew increased by almost 10-15W which at 19V is 0.5-0.75A. I would think without the fan the power consumption would decrease. The GPU and CPU also got very hot. The weird thing is, when I plugged the fan back in, the power consumption dropped back down to its normal level. The fan initially ran at maximum speed which I have never heard before. After about 2-3 mins, the fan speed dropped to its normal level which I can only hear when I am about 6" away.

 

I am going to have to experiment a bit more and monitor the temps. I am perplexed why the power consumption increased without the fan.

12TB NAS >> i7-6700 Server/Control PC >> i3-5015u NAA >> Singxer SU-1 DDC (modded) >> Holo Spring L3 DAC >> Accustic Arts Power 1 int amp >> Sonus Faber Guaneri Evolution speakers + REL T/5i sub (x2)

 

Other components:

UpTone Audio LPS1.2/IsoRegen, Fiber Switch and FMC, Windows Server 2016 OS, Audiophile Optimizer 3.0, Fidelizer Pro 6, HQ Player, Roonserver, PS Audio P3 AC regenerator, HDPlex 400W ATX & 200W Linear PSU, Light Harmonic Lightspeed Split USB cable, Synergistic Research Tungsten AC power cords, Tara Labs The One speaker cables, Tara Labs The Two Extended with HFX Station IC, Oyaide R1 outlets, Stillpoints Ultra Mini footers, Hi-Fi Tuning fuses, Vicoustic/RealTraps/GIK room treatments

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That is a result I would not have expected; but 10-15W in addition to the normal power consumption is a bit much for the small heat sink.

 

I just browsed the processor's data sheet, but there is nothing in there which would explain the behaviour you observed. So probably no chance after all to run this device without it's accustomed fan.

Primary ::= Nabla music server | Mutec MC-3+USB w/ Temex LPFRS-01 RB clock | WLM Gamma Reference DAC; Secondary ::= Nabla music server | WaveIO | PrismSound Lyra

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