XPS Desktops

Last reply by 07-21-2021 Solved
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2 Jasper
2 Jasper
153282

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)
5630

I added the cpu fan. I split connection of the cpu fan header. I'm seeing max temp of 66 now. Machine is quiet. Loudest fan in the case is the rtx 2070 super.

Anonymous
Not applicable
5688

@JamesonB    I added the cpu fan. I split connection of the cpu fan header. I'm seeing max temp of 66 now. Machine is quiet. Loudest fan in the case is the rtx 2070 super.

Great Job! . . . and great temps. Can you share some photos of the completed mod? Some of your previous photos did not post.

5832

Added them back and pics of the second cpu fan. Noctua supplies the splitter with the NF-A9 and an extra set of mounting brackets for the fan are supplied with the CPU cooler. The Noctua splitter splits from a 4 pin to a 4 pin and a 3 pin. I connected the push fan to the four pin and the pull to the 3 pin. My understanding is that the missing pin on the one Y connector is to monitor RPM. Given Im using the same fans it doesnt have to monitor both and will provide PWM to both.

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5646

@JamesonB Quick question: are the M3 screws and washers come as part of the Noctua NH U9S package or do they have to be purchased separately?

5346

The screws and washers have to be purchased separately. I bought mine from Lowes. Home depot should have them too. Others have purchased from amazon, but i wasn't looking for a kit of 300 pieces.

8916

Good job here, I used exactly the same cooler with my G5 5090. FYI, I think you installed the mounting rails incorrectly, they should have run from left-right as per the picture instead of top-bottom (according to the Noctua installation guide)...but I dont think it matters.

4622

@JamesonB Hi! A total noob here, I want to try this out myself, but Im not exactly sure what I need. After going through this very useful thread, I decided to go for the NH-U9S and NF-A9 like you did, but since the NF-A9 has some variations, PWM, FLX, which one with how many pins do I want for the 8940?

Another thing, you moved the cage of the hard drive, is this necessary to have enough space?

I also notice that the GPU only has one fan, which normally should have 2. Is there any way to add one more and would it be necessary for the long run?

Thank you!

4616

@hquangn go for the PWM, it should have four pins. 

https://www.amazon.com/gp/product/B00RUZ059O/ref=ppx_yo_dt_b_asin_title_o01_s00?ie=UTF8&psc=1

Regarding the hard drive cage, I wanted unrestricted airflow, space was of no concern.

Truth be told I don't know what the best approach is for the video card. I'm sure its fine the way it is, but if you had to you could find some after market cooler.

https://www.amazon.com/ARCTIC-Accelero-Xtreme-III-CrossFire/dp/B007YLUCKQ/ref=sr_1_1?dchild=1&keywor...

Have fun tinkering

4174

@JamesonB thank you for the quick reply! I will post my result here in a few days when all the parts arrive.

Also, there is no way to upgrade the PSU right? Can you confirm this? 

Anonymous
Not applicable
4012

@hquangn     Also, there is no way to upgrade the PSU right? Can you confirm this? 

That issue has had some great work done by @redxps630  . . . but I believe is still a work-in-progress . . . needing additional confirmation for XPS 8940

Dell 6-pin to ATX 24-pin 

Of course . . . an ATX PSU would most likely need to sit outside the case.

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