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Bitcoin => Hardware => Topic started by: thierry4wd on March 18, 2020, 09:43:22 PM



Title: Inside APW9 (T17 / S17)
Post by: thierry4wd on March 18, 2020, 09:43:22 PM
Hi all, i want try to mod fan APW9 for reduce the noise, i thinks is very easy, just make resistor on positive wire on each fan :) , just monitoring temp to not going over ! lol

Just for fun, i share here a picture !

https://image.noelshack.com/minis/2020/12/3/1584567698-apw9.png (https://www.noelshack.com/2020-12-3-1584567698-apw9.jpg)


Title: Re: Inside APW9 (T17 / S17)
Post by: mikeywith on March 20, 2020, 01:40:53 AM
I like the idea, the fans on the APW9 PSU are indeed a bit noisy with that whining noise, I set the miner fans at 90% almost all year long so that surpasses the noise coming from the PSU so I never really bothered, but I am sure others will find it useful, are you actually trying to force the PSU fans to run at lower RPMs?

And since we are at it, I am interested in knowing the fan dimensions of those APW9, I know APW3 and APW7 have a fan size of 6cm x 6cm x 2.5cm but from the look at it seems like the once on APW9 has a different size.


Title: Re: Inside APW9 (T17 / S17)
Post by: AlecMe on March 20, 2020, 06:47:44 AM
If you manage and have the time, post a decibel reading from the PSU fans before and after. I am not sure from the picture, but can you start just the PSU for the test?

Will keep watching as so far that sound is driving me crazy  ;D

Thanks


Title: Re: Inside APW9 (T17 / S17)
Post by: thierry4wd on March 20, 2020, 09:21:34 AM
Hum ... i don't take real size, but i thinks the APW9 fans is 40x40mm and i thinks the speed is arround 10/12000rpm ! smaller than APW3 / APW7, and the APW9 fan is very lound :s, is arround same noise than 120mm fan at full speed ! very bad !

So, i need to improve this :p

For this mod, i go to slow ! is my better machine !!! i don't need to broken this lol (T17)


Title: Re: Inside APW9 (T17 / S17)
Post by: philipma1957 on March 26, 2020, 10:02:22 PM
Please tell us how this mod has progressed for you.


Title: Re: Inside APW9 (T17 / S17)
Post by: AlecMe on April 01, 2020, 08:42:40 PM
silly thought... can the PSU be left open, and the fans took out?

to avoid overheating I am thinking of placing some 3 or 4 140mm arctic (pc) fans, way silent (2000rpm) to blow on the PSU?

My question: Would the PSU start if no fans are present? ie fail-safe to avoid overheating? If yes, can the PSU power the other fans and 'tricked' into believing they run at the 'safe/recommended' speed of its original fans?

I would not go through all the trouble, but this high pitch sound is a bit annoying :)


Title: Re: Inside APW9 (T17 / S17)
Post by: philipma1957 on April 02, 2020, 01:28:21 AM
silly thought... can the PSU be left open, and the fans took out?

to avoid overheating I am thinking of placing some 3 or 4 140mm arctic (pc) fans, way silent (2000rpm) to blow on the PSU?

My question: Would the PSU start if no fans are present? ie fail-safe to avoid overheating? If yes, can the PSU power the other fans and 'tricked' into believing they run at the 'safe/recommended' speed of its original fans?

I would not go through all the trouble, but this high pitch sound is a bit annoying :)

A good question. I donít have one on hand. With shelter in place I wont be driving to the main location any time soon.


Title: Re: Inside APW9 (T17 / S17)
Post by: thierry4wd on April 03, 2020, 11:43:33 PM
Inside APW9, have 3 connector for this 3 fan... So, the psu don't read the fan speed ! each fan have only two wire, so no "wire" for tachymeter !

I thinks, the psu have security for "fan lost", and i thinks only read intenssity at each fan, if on fan "show" no amper, so no power, the psu enter in security mode !


IS NOT POSSIBLE left open the psu, the reason is simply, the way of air flow is totaly wronk ... but, i have inspected this, and, the top right and and the midle right is the most high temp zone ... but all psu need fresh air ...

i thinks is possible make two fan 120mm on the left, and on litle more power on the top right ;)

All is purpose... at your hown risk, i don't tested this ;)


Title: Re: Inside APW9 (T17 / S17)
Post by: Artemis3 on April 25, 2020, 02:20:16 PM
Leaving it open could be useful for immersion cooling, but most likely you will end having to turn the miner 90į anyway for vertical flow.

3 wire usually means it gets rpm reporting, just no speed control. Lets hope its the other way, and that third wire is just blindly controlling speed according to some inside sensor temp.


Title: Re: Inside APW9 (T17 / S17)
Post by: AlecMe on April 27, 2020, 07:31:20 PM
Do you have a photo of the label on the Vents?

Would love to find their specs online (cfm, rpm, etc) especially CFM.