Aurora R15 mighty 1350w PSU

basc psu calculator shows one does not really need the 1350w psu for i9-13900KF, 32GB DDR5, RTX 4090, NVMe SSD

Lod Wattage:769 W
Recommended PSU Wattage:819 W

nor does R13 need 1350w psu to run i9-12900k and RTX 4090, which suggests R13 user can run the 4090 using the 1000w psu.

Load Wattage:758 W
Recommended PSU Wattage:808 W

This is also corroborated by techpowerup spec on Dell oem RTX4090: suggested psu 850W

In case someone wonders, the R15 proprietary 12 pin motherboard socket is built on the R13/14 10 pin socket. The extra 2 pin likely provide more 12V power, and pinout are likely +12V and Gnd.  The 10 pin 750/1000w psu of R13 are compatible w R15 motherboard which was mentioned in spec.  You can plug the 10 pin connector of 750/1000w into the R15 motherboard 12 pin socket as illustrated in R15 service manual.

The 10-pin connector belongs to older R13 while 12-pin connector belongs to newer R15. The 12-pin connector is just the 10-pin cable with 2 extra wires to provide extra current. As long as your power supply can provide sufficient power to the motherboard, you can still use 10-pin power supply. 

thank you for this!  Does this indicate that this psu will not work in an R13 (as its 10+4+4)?  Maybe there is a 12 to 10 adapter?  Also, in the picture I do not see the 12VHPWR gpu power cable?

good question.  I think you may be able to physically plug a 12 pin connector in 10 pin socket of R13.  The extra 2 pin would be unused hanging in air.  This is like plugging an 8 pin eps connector in a 4 pin cpu socket of some motherboard.

I think one way to try to answer this question is to go back to 24 pin ATX.  Some older ATX power motherboard use 20 pin socket. For that reason some psu makers design their 24 pin connector to be splittable 20+4.  Based on that reasoning I think there is a good chance the 1350w psu 12 pin connector would electrically work with R13 motherboard 10 pin socket too.  Ultimately it would be nice if Dell engineer or some one can validate this before user purchase the 1350w upgrade.

I do not know why Dell designed an extra ostensibly unneeded 4 pin cpu connector for the 1350w psu.  Can this be a backup 4 pin connector if one of the first two do not work. strange.

Will be interesting to see the 120 VAC requirements for a 2,200 Watt PSU.

For those interested checkout the certification result of 1000w vs 1350w oem psu by Delta

https://www.clearesult.com/80plus/sites/80plus/files/manufacturer-certificate/dell-d1350epf00-11572.pdf

https://www.clearesult.com/80plus/sites/80plus/files/manufacturer-certificate/dell-d1000eps00-11573.pdf

No ATX 3.0??

BWAHAHAHAHAHAHAHA!

It uses psu extension cables to meet ATX3.0 standard: 12VHPWR+ 2 sense pins. The psu itself still uses two GFX cables each having one 8 pin and one 6+2 pin piggyback connector.  The numbering goes GFX1-4.  The extension cable for 4090 12VHPWR is GFX5.

hmm, so with only 2 physical power feeder cables, this means the psu cables are spec'd to handle the potential 300 watts each for an overclocked 4090, as the 12vhpwr adapter cable internally just connects all positive and negative leads together.  I also read that one can lower the power draw of the 4090 by 80% and still get like 99% of gaming performance out of it, even 75% reduction yields like 97% and doesn't make a dent.  Given this, by using a 6 to 8 pin adapter, I can easily run a 4090 off my day-one R13's measly 750 watt power supply.  Go with a 4090 FE, as one fan grabs air from the top, remove the psu shroud for the other fan, should be good to go, just need the 20% sale and I am in!    

No, it doesn't need a 1300w psu at all.  You'd have to try VERY hard to need a 1000w psu.

IMV someone can put sufficient load to need 1300W PSU if tries harder than your "very hard",
here are rough estimates:
CPU: 250W (peak power actually 253W as per anandtech)
RAM: 6W (slightly below since one DDR5 module is sub-2.5W)
Fans: 60W (5 fan connectors, actually rated above 1A on 12V, but let's put normal limit)
PCH: 8W (Z690 actually rated at 6W if all functionality is used but let's overprovision a bit)
VR memory: 5W (guesstimate)
VR cpu: 20W (guesstimate too)
Storage (NVMe/SATA): 50W (some enterprise grade drives are rated slightly above 1A)
USB: 20W (e.g. my 4K Webcam rated at 5V/1A)
LAN: 5W
Other 15W (Audio, BIOS, etc.)
PCIe: 200W (75Wx3slots, but one slot will actually be free if 4090 is plugged)
GPU: 650W (some Nvidia 4090 models, or just 450 for reference model), although 75W from this load already counted above.
Total: 1290W (-150W accounting for one PCIe slot free and avoiding 75W double-count for 4090)
which is above 1000W.

so we do have a theoretical peak of 1140W (>1000W)
but considering Dell bios-level restrictions (e.g. probably enforcing CPU PL2 limit and preventing going further to PL3/PL4) it might be indeed down to sub-1000W
(although 1KW PSU most likely has some tolerance to deal with short spikes for +15%, but depends on distribution between rails).

Another thing - 4090 GPUs (non-founder editions) going above 450W limit won't fit into R15 (so we probably have another 200W off)

Generally I do agree with you about 1KW practical limit since I would hardly expect situation with 100%+ on CPU  in turbo load on power-heavy instructions with all storage devices fully active and 100%+ on GPU in real-world scenario (but what about another GPU or power-heavy PCIe card in second slot?)

Like I mentioned before, 5900X at 4.6 Ghz (overclocked), 2 x 16 GB RAM modules with RGB effects, RTX 3080 OEM Dell model, 1 Tb NMVe, 1 TB 2.5" SSD, WiFi, 2.5 Gbe NIC, 2 CPU fans, 3 case fans, Lian Li strimer for motherboard + video card, RGB motherboard using USB, 2 external USB hubs, 2 x monitors.

Total power draw when running games, or benchmarking: 500 Watts absolute maximum, usually around 470 Watts. Desktop use is around 290 Watts.

Buy it here 279USD : https://www.365powersupply.com/product/xyjht-0xyjht-1350w-power-supply-for-dell-xps8950-3910-t3660-r13-r14-d1350epf-00/

Who have D1350EPF-00  's product brochure? I really need it .