Powering a 6 pin GPU off of a 180 watt DC jack

[john826472]

Hello everybody

I am asking, is it possible to power a 6 pin graphics card off of a 180 watt dc powerjack by some how rigging the 6 pin connector?

 

 

[Houndz199]

Although I am sure you could, by the time you bought the necessary things to do it, you would be at the cost of a power supply. Plus in general that just sounds like a bad idea

 

[themctipers]

very bad idea, please don't do it

 

get a new power supply. 

[SilicateWielder]

13 minutes ago, Aladd2040 said:

Hello everybody

I am asking, is it possible to power a 6 pin graphics card off of a 180 watt dc powerjack by some how rigging the 6 pin connector?

 

 

The answer would be No, not without adapting your voltages. and basically building your own power supply. 

 

Plus, you can very easily fry your GPU doing this.

[SpaceGhostC2C]

9 minutes ago, Aladd2040 said:

Hello everybody

I am asking, is it possible to power a 6 pin graphics card off of a 180 watt dc powerjack by some how rigging the 6 pin connector?

 

 

The main problem you will face when using any kind of secondary power supply is synchronicity: computer PSUs are of the switching kind, but the different states may not coincide in time and, as far as I understood, that could be risky for components. There are some accessories to hook two power supplies that in principle should take care of that, although I haven't use them.

This is a problem for GPUs since they receive power from the PCIe slot as well, so they are always hooked to the main power supply through the motherboard (at the very least, you can say they are hooked to the motherboard's power delivery for PCIe), on top of whatever you use to feed the 6-pin.

A secondary power supply would work much better and with less hassle for hard drives or other components that only get power from one source.

[john826472]

Could i use a less powerful brick PSU like an 80 watt? Because the GPU should only draw what power it needs from the PSU.

 Also i am not able to use a normal power supply due to size constraints. 

[john826472]

For reference the 6 pin GPU i am talking about is the GTX 1060 

[Guest]

5 minutes ago, Aladd2040 said:

Could i use a less powerful brick PSU like an 80 watt? Because the GPU should only draw what power it needs from the PSU.

 Also i am not able to use a normal power supply due to size constraints. 

The problem is the voltage. Using wall power would mean you are pushing 230/110V (didn't take vrms into account, but you get the point) through the gpu, which would fry it immeadialy. The workaround is build a DIY voltage regulator, but you need to have skills and won't be cheaper than just using a psu.

[john826472]

1 minute ago, FTL said:

The problem is the voltage. Using wall power would mean you are pushing 230/110V through the gpu, which would fry it immeadialy. The workaround is build a DIY voltage regulator, but you need to have skills and won't be cheaper than just using a psu.

I am talking about using an 80 watt 6.6A 12 volt power supply.

[Guest]

5 minutes ago, Aladd2040 said:

I am talking about using an 80 watt 6.6A 12 volt power supply.

The GPU doesn't only use 12V, i think it uses 5V and 3,3 V too.

Edit: I'm wrong. Sorry. It only uses 12V

Picture: https://goo.gl/images/iV4Eb0

[SLAYR]

27 minutes ago, Aladd2040 said:

I am talking about using an 80 watt 6.6A 12 volt power supply.

It is possible to yes, it isn't worth it to though if your psu doesn't have pcie connectors you should get a decent one that has them, or even a molex to pcie six pin.

 

https://www.amazon.com/gp/aw/d/B01D0XATL8/ref=mp_s_a_1_2?ie=UTF8&qid=1481910360&sr=8-2&pi=SY200_QL40&keywords=molex+pcie&dpPl=1&dpID=41Ws2fmp%2BzL&ref=plSrch

 

Most likely if it is a cheap adapter it will have a lot of ripple current, so your gpu is actually receiving 12V + or - x amount of ripple voltage, with too much ripple you could fry the gpu, too little and the card will crash.

[SLAYR]

41 minutes ago, Aladd2040 said:

 Also i am not able to use a normal power supply due to size constraints. 

You get a pico psu, and solder on a six pin connector for just the gpu then.

 

https://www.amazon.com/gp/aw/d/B005TWE3O8/ref=mp_s_a_1_3?ie=UTF8&qid=1481910582&sr=8-3&pi=SY200_QL40&keywords=pico+psu&dpPl=1&dpID=31rL-5S2vBL&ref=plSrch

 

Take the two 12V pins on the 24pin connector and the 12V wire on the molex and solder them to a six pin connector, as well as the ground wires.

[john826472]

1 minute ago, SLAYR said:

You get a pico psu, and solder on a six pin connector for just the gpu then.

 

https://www.amazon.com/gp/aw/d/B005TWE3O8/ref=mp_s_a_1_3?ie=UTF8&qid=1481910582&sr=8-3&pi=SY200_QL40&keywords=pico+psu&dpPl=1&dpID=31rL-5S2vBL&ref=plSrch

 

Take the two 12V pins on the 24pin connector and the 12V wire on the molex and solder them to a six pin connector, as well as the ground wires.

Thanks i found one on amazon. 

[asand1]

Most wall wort power supply are only half wave rectified. I would Not do this, too much room for error.

[john826472]

11 hours ago, asand1 said:

Most wall wort power supply are only half wave rectified. I would Not do this, too much room for error.

Well the power supply i am using is for a Pico ITX motherboard so i assume that it is quite stable.