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Active CPU cooling for the Gen8

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Cap_peeps
Posted (edited)

Hi dittohead and thanks for the reply. However, now it confused me a little bit :D, because according the overcoat picture there is no GND (black cable) connection from the original 6 pin connector. As I understood the setup was to have a GND directly from the molex cable, not also from the 6 pin connector. So what's the correct way ? have it connected according your scheme or overcoat pictures ? 

 

original from overcoat:

https://ibb.co/BGn1yFB
https://ibb.co/SwtGZ51

Edited by Cap_peeps

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Cap_peeps

Ok guys, do you know why my post is still showing as hidden ? 

 

Hope that it is not because some specific words (but I removed them for sure). So I will try to add it here again.

 

Hi dittohead and thanks for the reply. However, now it confused me a little bit :D, because according the overcoat picture there is no GND  connection from the original 6 pin connector. As I understood the setup was to have a GND directly from the molex cable, not also from the 6 pin connector. So what's the correct way ? have it connected according your scheme or overcoat pictures ? 

 

original from overcoat:

https://ibb.co/BGn1yFB
https://ibb.co/SwtGZ51

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Cap_peeps

Ah. ok I got it. I didnt spot the message that content need to be approved. I am sorry for that. Can you please remove the previous one with this one ? Many thanks and sorry once more. 

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Trig0r

No worries chap, there is a new user post limit, stops us being over ran with adverts and spam...

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dittohead
On 6/24/2020 at 12:49 PM, Cap_peeps said:

Hi dittohead and thanks for the reply. However, now it confused me a little bit :D, because according the overcoat picture there is no GND (black cable) connection from the original 6 pin connector. As I understood the setup was to have a GND directly from the molex cable, not also from the 6 pin connector. So what's the correct way ? have it connected according your scheme or overcoat pictures ? 

 

 

You should connect GND's to make single GND for driver inside cooler

It is possible, that if you measure PWM signal from motherboard related to molex GND you will get wrong value, and here you will have a one measure point for PWM

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Cap_peeps

Ok,

I am affraid that there is something wrong with my cabling setup or just not sufficient power to power up two fans (?).

Now I have litterally all GNDs soldered together. Red cable (+12V) from motherboard connector skipped. Replaced with +12V source from molex. But result is: either only CPU fan is spinning and case fan not or both of them are dead. When I turn of the server, nothing spinning and after few secconds it starts beeping and front light goes red. 

Scratching the head for two weeks already but still not able to find solution. From which source should I take the mythical +12V.

I am using the power from ODD bay. 

 

I can send the pictures of created cable but not sure if it help. (previous ones didnt :( )

 

Many thanks

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dittohead

Red led means motherboard not receive tacho signal from cooler, so check connections for pwm and tach signals  

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Cap_peeps

No, no, no, just nooo. It's just cannot works. I checked cabling, resoldered them , changed cables, tried different connection. But it's just not working.

The original fan is working good. The new cpu fan works on new cable, so at least the gnd and +12V are working good. But the case fan still dead. I tried to swap the PWM with tacho, but not any progress. I am starting to think, may it be possible that the issue is the software ? Bios, or any kind AHCI setup ? Because I have still the original one, not upgraded yet. (What was planned after the hardware part is done). 

It's starting to be depressing to find out where the issue is. :( 

(I bet that it is some stupid thing, most probably between the chair and solder gun)

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Cap_peeps

Hi all, I am still struggling with the fans. 

 

Here are pictures of my cables according schema provided earlier. 

https://ibb.co/C9zVZ1j
https://ibb.co/pKWfsYh

 

and taking the power from:

https://ibb.co/BZgXSkz

 

I found out that the new CPU Fan is working with just GND and +12V connected directly. However, when I connect the case Fan, it's just dead. It looks like it wants to spin but not enough power or something. I thought that the case fan will work on the full speed without any PWM or tacho connected. Instead, it's just not working. 

 

I did a test with original case fan connected with original 6 pin connector and modified case fan connected with only GND and +12V. And nothing happend. But the new CPU fan worked. 

 

So nobody had a similar problem ? Once you moded thet cabling or fan, it's just worked ? 

 

Aah, it looks like my bad luck is still upon me. 

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radaxian
Posted (edited)

I have added active cooling with good results, but I went about it MacGyver style and hacked into it. 

 

The stock heatsink is actually quite effective, so I decided to keep it and cut a diagonal part out of it and simply lay the fan on an angle. It actually works well as the fan pulls cool air in across the heatsink and blows it out towards the rear exhaust fan.

 

The photos will speak for themselves...

 

 

CPU - Xeon 1270 V2

 

COOLER - Stock (Hacked)

 

CPU FAN - Noctua NF-A9x14

(Feeding 12v directly with a low speed adapter NA-RC12)

 

REAR Fan stock (No need to change it)

 

TEMPS - Idle 27c, Load 54c

 

 

Very quiet

 

RAID mode, OS controlled fan speeds via Windows 2019

 

https://www.dropbox.com/sh/rypw5zk81wn7mah/AAAAQXZHW9Qb_kbv-lNGGHFOa?dl=0

Edited by radaxian
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