XPS 8940, I should have looked closer before buying

Thanks for the reply, Dell630i.
Is the 6-pin mobo power connector the cord that connects the PSU to the motherboard?
Again? What is the thinking behind that?

Like I alluded to, I am happy with my XPS - for now, but just thinking down the line.
I had my 8900 for almost 7 years, and had to replace the GPU about 3 years in, which required an upgraded PSU as well, and this was no problem.

Dell claims the XPS 8940  is "highly expandable" ... I guess it is if one desires to pop in four more storage units (HDDs & SSDs) but you better not add anything that will require more power I suppose (but isn't what most people choose to upgrade is the GPU, which may require more power?)

Oh well ....... maybe Dell is planning on making PSU greater than 500 watts for this (and other PCs).

Thanks, again, Dell630i, for you reply, and you are correct ... my fault ... lesson learned, and I believe this experience will probably move me towards building my own in the future ... starting with the case.
I really appreciated your input.

For what I do and the games I play (maybe Anno 1800 and Satisfactory are the most demanding - graphic wise) I think I should be fine and hope the RTX 2060 Super (with just 1 fan?) holds up.

I already replaced their garbage fans with a pair of Nactura NF-A8 Premium Quiet fans, and will just have to move ahead.

Thanks for your honest input - very much appreciated.

I have the same computer. I knew about the heat issues beforehand. Best solution is to swap out the CPU cooler for a Noctua NH-U9S or NH-9DL. Put one of your existing Noctua fans at the top rear exit and the other at the lower front. You will not have anymore thermal throttling issues with a new CPU cooler.

Different online PSU calculators recommend 400-465w with your setup. So you are close but fine. Yes, you may have trouble in the future if you wanted a more power hungry GPU, but I don't see you outgrowing the 2060 super anytime soon. With that video card and amount of ram, I do not see any reason you would have to upgrade in the near future. 

The only thing I was not aware of was the fact that you could not just add ram because of the lack of XMP profiles and the weird ram DELL uses. Better off just pulling all the DELL ram and swapping it for some Crucial. You have plenty of ram though... so again you are fine.

Just swap that CPU cooler!

Thanks, kanadian-kaos.

Like you, I believe I am fine with my Processor, RAM, and the 2060 Super, for the time being, as well, but like your idea of adding the Noctua cooler, which I just may do.
Curious about where the fan goes in the front of the case, but I will look into that.

Again, and with what you stated about the type of RAM, it looks like building from scratch is the way to go in the future.

Thanks, again, for your input.

@kanadian-kaos 

Just curious...how did you mount the 2nd case fan @ lower front location and did you set this up as intake or exhaust?  Seems to be little room, open air space behind PSU and that this would require modification, drilling holes etc just to squeeze in.  Was debating if worth doing if overall level of performance isn't much better or worse yet, there is a tradeoff like increased noise or something along those lines.  If you have a pic, that would be great.  Much appreciated...

Yes .... in the garden, next to the bell peppers.
That actually may happen someday.

https://www.moddiy.com/products/Dell-Inspiron-3650-PSU-Main-Power-24-Pin-to-8-Pin-Adapter-Cable-30cm.html

There is even an engineer who designed his own adapter from scratch.

https://raphtec.wordpress.com/projects/dell-poweredge-t20-atx-power-supply-adapter/

https://www.youtube.com/watch?v=oiwJ62TnrOc

They anticipated people wanting to MODDIY so they changed it again.

The 3040 5040 7040 24 to 6 pin WILL NOT WORK because that's not how the 8940 power supply rolls.

not single 6 pin and 4 pin

Has 6 pin and DUAL 4 pin and other connections.

You might get away with modifying the original power supply and a moddiy 24 pin to 6 pin by splicing cables from a regular EPS12v power supply but it wont physically fit in the case.

It is NOT a Moddy 5040 six pin due to the OTHER connectors being non standard.

https://www.dell.com/support/home/en-us/product-support/product/xps-8940-desktop/docs

@KGA4841 

I mounted the Dell 80mm there using the existing rubber hardware. I removed it though as it was quite loud (I think it ran at a high RPM). I will be replacing it next week with another 92mm Noctua and I will probably mount that one with double sided sticky tape.

I will take a picture when I put the new fan in the lower position.

I say just leave it alone and build your own. And if Dell keeps doing all this it will go down the toilet like Compaq. 

Yes HP purchased Compaq I feel this may be one reason Compaq went down. The name went on for awhile HP was selling Compaq's but Compaq had a bad reputation that is why Compaq is no more.

The website don't even work anymore HP stopped selling the Brand.

I now completely agree with you, 3 Argentum, building my own is the way to go from here out.
Thanks.

Maybe someone from Dell will see this and do something. I think it is also why Gateway went down the toilet also. 

I have always had good luck with HP Computers. And at one time I had a Compaq it was good that is because it was exact same has HP models just the name Compaq. HP I guess did not see a reason to have both brands and kelp the one with good reputation.

But HP does somethings these days that may get them into trouble. 

@KGA4841 

Here is my full cooling setup. In order of best return for cooling.

1. Noctua NH-U9S CPU Cooler (Do this first!)

2. Noctua NF-A12x15 120mm (run off Sata power with one Low Noise Adapter) in top front position

3. Noctua NF-A9 PWM 92mm (run off case fan header) in top rear position

4. Noctua NF-A9 PWM 92mm second CPU cooler fan

5. Noctua NF-A9 PWM 92mm(run off case fan header) in front lower position

6. Noctua NF-A6x25 flx (run off case fan header with ultra low noise adapter), this is cooling the GPU and Power supply

Most would be happy with 1-4. 5 and 6 are unnecessary. The 120mm front fan moves enough air by itself.

Top fan uses Noctua mounts. Middle and bottom use zip ties.

Runs in the mid to high 30s (34-37c).

Gaming is mid to high 60s (64-69c). Way better than stock where I would thermal throttle at 99c!

Some SFX form factor PSU are 2.5" inch wide which is pretty much the exact width available in the case. 

So, let say someone is willing to modify the case to cut off a larger hole and add some mount fixation anchor for such psu, then would the dell OptiPlex 24 pin to 6 pin adapter work?

Here is an example of a SFX PSU. 
https://www.newegg.ca/cooler-master-v750-sfx-gold-mpy-7501-sfhagv-us-750w/p/N82E16817171171
It has the following connectors : 

My idea (perhaps a dumb one since I don't much regarding hardware) is that the EPS 4+4 could connect to both ATX CPU1 and ATX CPU while the adapter is used to connect the ATX 24 pin to the motherboard's 6 pin. Would this work?