G5 5090 psu upgrade to 850W that fits inside the case

Silver stone SFX 1000W

125 mm (W) x 63.5 mm (H) x 130 mm (D)

https://www.silverstonetek.com/product.php?pid=965&area=en

G5 5090 stock psu is a modified TFX with dimensions 85x65x225 mm.  (standard TFX is 85x65x175mm)

Silverstone Technology 800W SFX-L

Corsair SF750

Seasonic Focus SGX-650

Corsair SF600

Installing Cooler Master in G5 5090 case.  Power plug access is not blocked.

SFX V850G5 5090

So it physically fits, but what about the pinouts on the cables for the mainboard, GPU etc?

GPU pinout is standard 8 pin or 6+2 pin PCIe

For mainboard 6 pin ATX use 24 to 6 pin adapter, or mod 24 pin of psu DIY.24-to-6 pin adapter

https://www.moddiy.com/products/Dell-OptiPlex-3040-3050-3060-Main-Power-24-Pin-to-6-Pin-Adapter-Cabl...

• 2 yellow wires (24 pin) –> 2 blue wires (6 pin)
• 2 black wires (24 pin) –> 2 black wires (6 pin)
• 1 grey wire (24 pin) –> 1 grey wire (6 pin)
•  Short green and black wire (24 pins)

24-to-6 mod
https://www.amazon.com/COMeap-Power-Adapter-Motherboard-13-3-inch/dp/B08M5BZ6P8

Mainboard 6 pin ATX pinout:

1 +5V PS_ON Blue.     4 +5V PWR_OK Gray
2 COM Black.              5 +12VBDC Purple
3 COM Black.              6 +12VBDC Purple

G5 6 pin

4 pin ATX-12V pinout

1 Gnd Black       3 +12V Brown

2 Gnd Black       4 +12V Brown

G5 4 pin

ATX-12V

So is all this tested and it works even with a 850W PSU? because I don't want to go through all this trouble and fry my system 

No user validated report of testing G5 using non OEM 24 pin psu.

this discussion topic is to give user information so that you can make your own decision.

850W psu does not have higher risk than 500W psu if it is made by a reputable vendor.  Cooler master makes better psu than Dell oem in terms of safety and stability.

I would love to know if anyone has done this and any issues they may have encountered.

not even moddiy is willing to test this due to risk of blowing up everything

@redxps630 

Installing Cooler Master in G5 5090 case. Power plug access is not blocked.

HOWEVER 90 percent of the air flow is Blocked. And that does NOT address the 12v only standby and other connectors.

Thanks a lot to user who has recently boldly verified CoMeap 24-6 pin adapter works for XPS 8940, which shares same psu with G5, kudos.

thats when you bust out the dremel and start cutting away. its only a case lol 

"Thanks a lot to user who has recently boldly verified CoMeap 24-6 pin adapter works for XPS 8940, which shares same psu with G5, kudos."

@redxps630 

this is very bad dangerous advice because nothing whatsoever was documented about how the other connectors for the motherboard were handled.  The six pin connector is only 1 of 3 that go to the motherboard.

Comeap specifically says it DOES NOT WORK.

@DELL-Chris M  would have more information.

CPU connectors ARE NOT GPU connectors and not related whatsoever.  This is beyond bad advice and could lead to damage to property and personal injury to the user.

@YogiEmoji 

There are systems that have adapters but the G5 8940 7080 are not in this category. 

I use Dell Precision T1700 with Moddiy Adapter and EVGA 700BR power supply.  I also have quadro RTX 4000 gpu.

This system is my daily driver and its working fine with windows 11 as well as all my CAD, Maya, VR,  workloads.  Also happens to work fine with my games.  I recommend T1700 models because they have the most features including thunderbolt option.

https://www.userbenchmark.com/UserRun/48970443

@YogiEmoji 

There is NO Adapter for this from Moddiy or Comeap or anyone else afaikt.

You try various adapters at your own risk.

Not safe.

FRY and Die just before motherboard fire.

All components fried, CPU, Ram, Motherboard, hard drive, etc.

Anyone who says otherwise should prove that they have a solution because if you ask Moddiy or Comeap they will both tell you there is no such thing.