XPS Desktops

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

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)

The one heatsink covers all of those individual VR components.   You should see a faint outline and two post holes on the board for where the VR Heatsink covers.   I can post a picture later if this remains unclear to you on your board.

No, that's fine, it's just that I had heard the voltage regulator referred to as a "module", rather than 21 separate components.  The service manual further confused me by suggesting that our CPUs didn't require one.

Thanks for your time...I just don't want to order something that's not going to work!

 

@AbleWalker 

According to this, on page 49 of the Service Manual, a non-K or non-F i9-10900 does not require a voltage regulator...?

XPS 8940 voltage regulator p.50 service manual.JPG

Correct.   In researching this, since the original CPU heatsink that ships with these models has the fan oriented facing the board, it is providing airflow down onto the board itself and cools the VR section.   My understanding is that the reason they use a VR heatsink in the K models is that the VWD01 fan is oriented perpendicular to the board and doesn't provide the same cooling.   

Nevertheless, many of the posts on this board reflect the use of other after market CPU heatsinks that have a similar fan orientation to the VWD01 and they do not mention the need for a VR heatsink. I've also seen other posts and you tube videos where users have applied aftermarket heatsink materials to the VR section.  In the end it is likely not essential, and a bit of a judgment call.

My decision to add it was purely to fully follow the higher level of heat management provided by the stock Dell configuration in the K model.   

@Jon-62 

Nice work.   I have always thought that adding the 120mm fan to the upper intake position is a good mod.   Did you trim/cut away part of the divider on the inside of the front bezel so air can actually get to the upper intake position?

The way Dell designed that front bezel they created a solid piece of plastic on the upper part of the front bezel rather than put slots there like on the Inspiron model.   Just trim way or cut some slots on the upper/lower divider on the inside of the bezel and the temps should improve even more.  There is no need to cut any openings on the bezel itself, the air from the lower grill should reach that upper position once you create a path.

The air coolers being used seem to be adequate in managing temps..  With the upper 120mm intake fan it should even be more effective.   Being able to mount the 120mm fan there also opens up the possibility of using the Corsair H60 (2018) CPU Liquid Cooler which should be plug and play on this motherboard like on the XPS 8930 and Alienware Rx models.  Would need to measure the clearance of the RAM sticks and SATA connectors on the motherboard at that location for the radiator + 15mm/25mm wide fan + 3d frame.

Are you planning on making those 3D printed frames for the 120mm fan install available for interested parties?

@Jon-62 

My mistake, looks like the 3D printed fan bracket was from @purpledrillmonkey from this post.

Plans look like they are here for anyone who has a 3D printer.

Good stuff!!

@HanoverB  Yes, I had the frame manufactured to @purpledrillmonkey 's design here in UK.  No, I've not cut away any of the plastic on the inside of the front panel yet, but I'll consider it if I need additional cooling.

thx all of you

@Jon-62 

I would suggest not cutting away the plastic. Those plastic cutouts actually slide into the metal frame and keep the bracket solidly attached. 

Ignore that comment. I thought you were referring to the plastic on the bracket itself, not the actual case. My mistake.

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