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Last reply by 07-21-2021 Solved
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2 Jasper
2 Jasper

XPS 8940, Better 3rd party cooler

Hello there

I would greatly appreciate any help to find a new/better 3rd party cooler for my XPS 8940. It came with the thin and small stock cooler and is overheating the whole time. I got a i9-10900 processor with 128 GB of RAM and I need this computer to generate some GIS layers. These jobs take 2-4 hrs every time and I can see that the processor is throttling or C° 97+ all the time.

I tried the Noctua 15S but the problem is there is no space for the bracket under the motherboard. The stock fan screws directly into the chassis from above.

Thank you very much

Replies (929)

You are getting those BIOS errors because of no fans hooked to the motherboard. You could hook the rear one back to the chassis header on the motherboard, leave the CPU cooler ones with SATA, and then just get another 92mm Noctua fan and stick it on the lower front and hook it to the CPU header. It would be only one extra fan.


Not applicable

@kanadian-kaos      You are getting those BIOS errors because of no fans hooked to the motherboard.

yeah . . . I missed that part about the SATA power connection. So all three fans are spinning at 2000 rpm . . . that should do it  


Thanks for sharing this! Let me ask you if this would be possible

- Drop the whole case and mount the XPS940 in a standar ATX case. is the MoBo Mini-ATX? Do you think the holes match the standard?

- Replace the stock CPU cooler with Noctua NH-U12P (I have one of those lying around)

I know the backplate is not a perfect fit but I am willing to adapt if necessary, also the PSU is not standard size but again I can devise some mod. The main points is whether the CPU Cooler would fit the bolt holes (I suppose they will as Noctua has similar mounting options on their whole line) and if the MoBo holes could allow the Mobo to be bolted to a ATX case 

Thanks anyone for your help!



I have been researching for a solution to avoid the BIOS errors that you are having because I want to also install the same Noctua NH-U9S Cooler.  

The solution is also from Noctua and it is the Noctua NA-FC1 kit.  Here is the Noctua webpage and the Amazon link as well for the kit.



Here is YouTube demostrating and explaining how it works.


As you will see the kit will connect to both the SATA power to adequately run the fans (up to 3) and it also connects the fan header on the motherboard to solve the BIOS error that you getting.

It has all the cables needed to connect up to 3 fans, power them from SATA, and also connect to MB Fan Header as well.

I am going to order the NH-U9S, the NA-FC1 kit, and an additional NF-A9 PWN fan to replace the stock exhaust fan inside the rear of the 8940 case.  I would to purchase a second fan and here is where I have a question for you.

I see you have two fans on the cooler.  From the pics I have seen so far for the NH-U9S I only see one clip to mount the fan that comes with it.  Also, the pics I have seen for the NF-A9 PWN fan does not seem to show a mounting clip to mount it as a second fan to cooler.  Where do I get the additional clip so that I can also mount a second fan to the cooler?  Please provides links, Amazon if possible, if I need to purchase a separate clip.

Please let me what you @Dreen_F think, and anyone else in this post for that matter.



A few more questions.  Did you have to purchase the 16mm M3 screws, and the M3 and M4 washers?  Or were they used from the original cooler configuration?  If they were purchased can you provide Amazon links please?

Lastly, a question for everyone.  Which thermal paste does everyone use/recommend?

BTW, I replied to your post regarding the BIOS errors you are getting.  I found a solution.  I forget to address you in the beginning of my post with the "@Darren_F", I mention this in case you didn't see my reply with the solution and also questions.  IF you can please read and reply as I am positive that it will resolve your BIOS errors, and I would like to know regarding my question pertaining to a second fan on the cooler..  As I stated in my other post I plan to do the same setup.


Hey @Darren_F , exactly how many washers did you use for each screw and in what configuration (as in like how did you stack the washer)? Also is there enough clearance to put the side panel back on?


@malauddin2 put the M3 washer on the M3 screw first, then put on the M4 washer. 


 @Darren_F  just to make sure though there is enough clearance to put the side panel back on right? and also what processor do you have? Because I have the g5-5090 with an i7-10700f , but the XPS 8940, and g5-5090 seem to be the same exact model but essentially reskinned. Thank you again for the reply your and your post has actually clarified many things (I'm inexperienced with this stuff sorry for all the questions)!


@malauddin2 I have the i7-10700k


Just another end user upgrading <Profanity removed> components.

Updated case fan to Noctua NF-A9 and cpu cooler to NH-U9S. All running off their respective fan headers. I now see max CPU temps of 75 instead of 95.

I used the black spacers provided by Noctua with pan phillips M3 x 16 mm machine screws and M3 washer to mount the brackets.

I moved the 3.5 drive tray to the top position in the case.

I plan to run another CPU fan and split the connection of the CPU fan header. 








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