Optiplex proprietary 8 pin and 6 pin pinout

8 pin, 3020/7020/9020, flip connector plug to face you.

PinNumber PinName Description

24 pin DIY mod

• 2 yellow wires (24 pin) –> 2 white wires (8 pin)
• 3 black wires (24 pin) –> 3 black wires (8 pin)
• 1 grey wire (24 pin) –> 1 grey wire (8 pin)
• 1 yellow wires (24 pin) –> 1 purple wire (8 pin)
•  Short green and black wire (24 pins)

off the shelf adapter

https://www.moddiy.com/products/Dell-OptiPlex-9020-PSU-Main-Power-24-Pin-to-8-Pin-Adapter-Cable-30cm.html

reference

https://baskotasushan.wordpress.com/2016/04/17/modify-2420-port-smps-to-dell-8-port-smps/

6 pin 3050/7050

flip the 6 pin plug to face you.

1 +5V PS_ON Green     4 +5V PWR_OK Gray
2 COM Black.                5 +12V White
3 COM Black.                6 +12V White

DIY mod of 24 pin

• 2 yellow wires (24 pin) –> 2 white 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)

off the shelf adapter

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

Did you make your own DIY adapter?  If yes you need to jump start your new 24 pin psu using paper clip to turn it on without plugging in motherboard. 
if adapter is from moddiy, but you want to double check before plugging it in, do the same.

How can I test this with a multimeter to make sure my adapter is working correctly before plugging it into my motherboard?

Thanks - this is helpful. But one question.  

I have few 8 pin 240w SSF supplies I want to use in 7050 SSF Opti's that use the 6pin ATX.

In building my own 8 pin to 6 pin ATX power supply adapter, what does one do with the purple, 12v Stand By wire from the 8 pin?   Ignore it?     I assume you also ignore the green, 5V PS ON wire as well.

I see that the 6 pin only has +5v PS on, +5v PWR ok, plus the two each COM and +12v?   Guessing the purple stand by and green PS on wires are not needed.  But thought i would ask before frying a MB. 

thanks  

Sorry, I was in a hurry. I DO SEE that the Green wire, PS ON is used in both.  

Seems the purple, stand by wire is the only 8 pin wire that does not have a direct correlation to the 6 pin

IT IS NOT Straight thru.

The standby on an EPS 12v power supply is 5v not 12v.

If you pass 12vsb back thru to the PSU 5vsb you run the risk of damage and fire and FRY AND DIE death of EVERYTHING.

There is an Engineer who designed his own adapter.

What they do is Dell proprietary, IT IS NOT ATX.

No such standard exists for 6 or 8 PINS

Even the power on isn't a simple 2 wire switch.

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

Speedstep 

Sorry, perhaps I presented the question incorrectly. 

I am not converting an ATX supply or converting a supply with a 20/24 pin output.   I do not have 20 or 24 pin PS.  I realize the DELL pinout is proprietary.  I know its not ATX. 

I am building my own 8 pin Dell 3040/7040 power supply cable (like you have pictured at example1, example 2) so that it will fit into a 6 pin Dell 7050 motherboard (your example1, example 2 

I am just trying to make the same cable that same as MODDIY does. https://www.moddiy.com/products/Dell-Proprietary-PSU-8-Pin-to-6-Pin-Adapter-Cable-for-3040-3050-3060.html  MODDIY DELL 8 to 6 PS adapter Cable 

It appears this MODDIY cable takes from the 8 PIN DELL ps cable the two grounds/common; the two 12+ power wires, the gray 5v/PWR_OK and the green 5v/PS-On and re-pins them to different locations at in the DELL 6 plug.  MODDIY appears to just eliminate/not use the purple 12v standby line on the 8 pin Dell plug. 

Is that correct? I understand pinnout location is different for both plugs.    

Unfortunately some go so far as to say its ATX and its not.  There is No Such Standard for SIX or Eight Pin.

@Dell-BradL   or @DELL-Chris M  might have more information.  There is no such thing as a straight thru cable. It is more complicated than that.

I already KNOW that the advice is absolutely WRONG due to saying 6 pin has no 12v Standby. If you look at the Power Supply Label you will clearly see it DOES HAVE 12v Standby.

Power supplies are not a single spec of WATTS or a single rail of 12v.  12v 18 AMPS is also a hard Limit based on UL94v fire safety standards.  The assumptions based on wire color are Absolutely WRONG.

That's a very bad conclusion based on just associating wires color with output without looking at the actual unit as well as not knowing what the engineering standards are.    I'm not going to validate something I do not own. 

I have many 9020 towers and I have a Dell 365W as well as an EVGA 700BR power supply with MODDIY  CAB359.

I do not work for Dell or Moddiy and I do not speak for them nor am I accountable for others giving advice that can lead to Dead system, Fire, Property Damage or worse.

I have 50 Years of hands on direct engineering experience including systems that came well before 1981 IBM PC or 1985 PC's Limited (DELL) Turbo PC.

I have designed clones for IBM PC XT AT as well as 286 386 486 Pentium  Pentium PRO Pentium II/III as well as Pentium 4 systems.  I am well versed in Power Supply standards as well as design standards that were Decades before MSDOS or the IBM PC ever existed including the orignial  Apple 2 systems from 1977.

None of the pinout advice given so far is Based on the Actual Standards. Being ATX 12v  EPS 12v  PCI-SIG, IEEE, ISO, MIL STD,  UL 94v CSA VDE fire safety standards etc.

Number of Pins IS NOT indication of output or compatability or fitness for a particular purpose.

I will not validate another users incorrect assertion of what Pin-outs are nor will I be responsible for the Damage that results from taking unverified advice.

This is risky at best and very bad advice IMHO YMMV.

CPU is NOT GPU connector and vice versa regardless of number of pins.  They are keyed but some users FORCE them into the wrong place and FRY and DIE.

They say that all 6 pin dell PSU connectors are the same.

They are not.  This includes the 7080 G5 XPS 8940 is NOT the same six Pin as earlier model Optiplex. 

EDIT moddiy has NO ADAPTER FOR 7070 a very bad sign.

I would NOT suggest you follow advice from persons making clear mistakes like saying there is no 12v Standby power.  Note that annotation on the power supply label.

Number of pins on a connector does NOT mean you should force a connector.  It can be done and FRY and DIE is real.  There is NO ATX or EPS STANDARD for 6 PIN or 8 PIN Dell PSU.  The Optiplex 7080 G5 XPS 8940 also has six Pin but its NOT THE SAME as other Six pin models.  Moddiy will also verify that they DO NOT HAVE AN ADAPTER for Dell Optiplex 7080  G5  XPS 8940.

Hi , 

I'm using this adapter: https://www.amazon.ca/COMeap-Power-Adapter-Motherboard-13-3-inch/dp/B08M5BZ6P8/

And everything turn on correctly but when I turn off the system the PSU still On , The GPU and Fans still ON max speed. 

If I turn on the system again everything is normal. 

Any idea? Thanks

It sounds like the motherboard logic is not able to release the green PS_ON pin (one of the 6 pin), or the non-Dell psu is not able to respond to motherboard logic control.  Is your motherboard able to turn off the stock Dell psu that has native 6 pin?

reference:

The motherboard doesn't turn the power supply on and off. It controls it between a low power standby, where only the 5v_STANDBY line supplies power, and full output.

What controls these two states is the PS_ON# line. Logic on the motherboard, powered by the 5v_STANDBY line, pulls PS_ON# low permanently to enable the power supply main output, and releases it high to disable the main output.

There are two converters inside an ATX power supply:

• The main converter which provides +12V, +5V, +3.3V, -12V and -5V.
• Low power standby converter which provides 5V with relatively lower power (e.g. 5V/1A). This output is called +5V_SB.

The latter one is entirely independent from the main converter and is always on.

The main converter can be activated by pulling low the PS_ON (green wire) or can be deactivated by either pulling that input high or leaving open. That is what actually the motherboard does.

So, the ATX power supply is never turned off. Only the main converter is disabled by the motherboard.

@Nano1126 

you did not say what dell model you own.

The linked comeap adapter incorrectly lists its compatable with Dell and  then its not. This adapter is not validated by Dell and is dangerous at best and a disaster at worst.

"Dell Optiplex 3050/3060/5050/7040/7050/7060/7070/7080 MT, Dell VOSTRO 3650/3653/3660/3667/3668/3669/V3267 with 6 pin port and other Dell motherboards using 6 pin power connector

(Note: Do not work with Dell workstation.);

standby voltage on these models is 12v not 5v

Moddiy in particular has NO ADAPTER for G5 /XPS 8940/Optiplex 7080.

There is no ATX standard for 6 pin or 8pin.

If you use this on a model that is not wired the same it will FRY and DIE.

Using this on any dell is an extreme risk.

The 3650 and 3670 and 3020 7020 9020 optiplex for example use 8 pin connector.

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

There is an Engineer who designed his own adapter for these models.

Its not a passive cable and its not straight thru and it uses more than one rail.

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

Hello  do you have the voltage for 8 pin as above, think my T3620 PSU is on the way out.

Thanks

Re: do you have the voltage for 8 pin as above, think my T3620 PSU is on the way out.

T3620 shares same psu 7VK45 T1M43 as optiplex XE2 MT.  the 8 pinout of XE2 is the same as 9020/7020/7040.  you may use standard 24 to 8 pin adapter.

@speedstep 

You will not “FRY and DIE”. The six pin models do not even HAVE a standby pin so you do not even NEED an “active” adapter. The only thing the “active” adapters have is a boost converter to convert ONLY THE STANDBY RAIL to 12v. YOU DO NOT NEED IT IF THERE IS NOT EVEN A STANDBY RAIL.