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XPS 8940, Better cooler

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Hello there

I would greatly appreciate any help to find a new/better cooler for my XPS 8940. It came with the thin and small stock cooler and is overheating the whole time. I got a i9 10600 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

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Re: Better cooler for XPS 8940

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Re: Better cooler for XPS 8940

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Thank you

No, I did not got any error because of the new fans. Not for the exit fan on the chassis neither for the two on the CPU cooler. I'm using the Y-cable included with the fan to be able to connect the two to the same CPU fan header. 

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Re: Better cooler for XPS 8940

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@svdgabriel     The stock fan screws directly into the chassis from above.

That sounds mighty peculiar   🤔   Any chance you could drop some photos of the inside of your case so we could see what you have going on?

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Re: Better cooler for XPS 8940

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@svdgabriel     The stock fan screws directly into the chassis from above.

OK, I found a schematic. The "from above" characterization was confusing me. You will not need a bracket behind the motherboard with that mounting design. The Noctua NH-D15S should fit, as it is compatible with the LGA1200 socket. The mounting holes for the Noctua should line up with the existing mounting holes.

 

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Re: Better cooler for XPS 8940

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Hello,

thanks for your help, I will try again and let you know, I do think the Noctua needs a plate in the back for LGA 1200 sockets, but that interferes with the case, which has holes for the stock cooler to be screw in directly. I will post some pictures 

 

thanks again

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Re: Better cooler for XPS 8940

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svdgabriel_0-1599724414719.png

I found this in the manual of the 8940. That cooler pictured is not the one that came with mine, the one I have is like a pancake with a small fan on the top and not heat pipes. However if you look at the image, you will see that the mounting here are just 4 screws that goes through the motherboard into holes on the chassis itself. Once in place there is no space for a third party cooler mounting bracket. I cannot find the part number or where to purchase even a cooler like the one in this picture (since it looks like a better solution than what I have).

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Re: Better cooler for XPS 8940

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@svdgabriel    I cannot find the part number or where to purchase even a cooler like the one in this picture (since it looks like a better solution than what I have).

You have a 65 watt CPU . . . I suspect the 125 watt "K" processors get the bigger CPU cooler.

Below is another schematic of the XPS 8940. In this photo you can see that the CPU cooler mounts to studs that are attached directly to the back panel of the chassis. This should be as strong (or stronger) that any back plate. You should be able to mount your Noctua to those same studs. You may have to use the screws that came with your tiny cooler if the Noctua threads do not match. Don't forget to apply some good quality thermal paste.

image.png

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Re: Better cooler for XPS 8940

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Awesome, I will try to use the screws of the stock cooler. I will post my results once I install the new cooler.

thank you!

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Re: Better cooler for XPS 8940

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@svdgabriel    Awesome, I will try to use the screws of the stock cooler. I will post my results once I install the new cooler.

Great . . . take some photos of your mod and post them . . . if you don't mind sharing. That would be more helpful for the next XPS 8940 owner that needs additional cooling than the schematic.

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Re: Better cooler for XPS 8940

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@svdgabriel how'd it go?

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Re: Better cooler for XPS 8940

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Hello there, I don´t know why now I can´t post any photos? Anyway, I couldn´t figure how to mount the Noctua cooler (NH-D9L) using the original backplate built into the computer chassis. So I ended just using an oscillating tool to remove the studs. The I just mount the cooler into the motherboard using the supplied hardware. This cooler works awesome, despite its small size. It dropped the temperature of the CPU under full load from 97°C to 70°C. I have the one fan configuration but I will add a second one and see if there is any further improvement. I wish I didn't have to do any modification to the case but it worked. I'm happy to share pictures of that as soon as I figure why I can't post photos right now.
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