How do I connect an 8 pin GPU to a 6 pin PSU?

some_4 · Feb 26, 2017

I was about to order my stuff for my first budget build but ran into yet another problem... I did try searching around but everything I found was either outdated or confused me even more

The GPU I want has an 8 pin connecter, the PSU has 1 x 6-Pin, 2 x 6+2-Pin

I'm getting very frustrated trying to learn everything and might just spend more money on a GPU with a 6 pin connector...

GPU: Sapphire RX 480 Nitro 8 GB https://www.newegg.com/Product/Product.aspx?Item=N82E16814202275&ignorebbr=1

PSU: VGA SuperNOVA 550 G2 https://www.newegg.com/Product/Product.aspx?Item=N82E16817438053&Tpk=N82E16817438053

CPU: Intel G4560 https://www.newegg.com/Product/Product.aspx?Item=N82E16819117743&cm_re=intel_g4560-_-19-117-743-_-Product

How can I make this work?? Thanks.

raisonjohn · Feb 26, 2017

That 6+2 pin connector of your PSU is for the GPU that requires 8-pin. Basically, that 6+2 pin when put together is equivalent to the 8-pin socket of your GPU.

This is how the 6+2 pin looks like:

some_4 · Feb 26, 2017

I appreciate your help! Now another question - the GPU says it requires a max output of 225w and the PSU only gives 150w from the 6+2 pin .. is that going to be a problem?

bignastyid · Feb 26, 2017

Your psu is more than enough. With an 8-pin connection the most that card can theoretically pull is 225w 150w from the 8-pin connection and 75w from the pci-e port. However it will not pull that much. An overclocked rx 480 can pull just north of 150w so the used an 8-pin connection instead of a 6 because a 6-pin is only rated for 75w.

atljsf · Feb 26, 2017

150 from the 8 pin cable, the other 75 watts comes from the pci express x16 slot where you inserted the gpu

before buying a gpu you must be sure what you are buying and if your current parts will support them

what psu do you have?

if it is too small you will have problems, the pc might shutdown or restart suddenly while playing, share the entire specs of your pc please

some_4 · Feb 26, 2017

https://pcpartpicker.com/list/7vvHbj

They don't have my GPU model on there but I linked it in my first post

raisonjohn · Feb 26, 2017

some_4 :

What was meant by that is: 8-pin connection @ 150W + PCIe connection @ 75W.
So, 150W + 75W = 225W. That's the meaning of "requires a max output of 225w" - hence, the GPU's 8-pin socket.

bignastyid · Feb 26, 2017

atljsf :

Did you bother reading the original post? Psu in question is a 550w Evga G2 which is more than enough for an Intel G4560 and a RX480.

WINTERLORD · Feb 26, 2017

not sure if tis stil holds true but a lot of times is also more about getting enough amps to the gpu and not always about watts

raisonjohn · Feb 26, 2017

WINTERLORD :

Wattage is Amperage x Voltage. If the +12V rail provides enough power (watts), it provides enough current (amps).

atljsf · Feb 26, 2017

i forgot that part while i was trying to answer another question, sorry for answering your question

Susquehannock · Feb 26, 2017

"With an 8-pin connection the most that card can theoretically pull is 225w 150w from the 8-pin connection and 75w from the pci-e port."

How is this regulated? Something inside the PSU that limits power to the connector at 150w?

atljsf · Feb 26, 2017

the 8 pin power connector offers 150 watts maximum and it was designed to be like that, it is well, basically a standard, how the psu does it, not sure exactly

if you need more watts, you need to use another cable

the pci express itself that offers up to 75 watts

the 6 pins power cable offers only 75 watts for the gpu

Susquehannock · Feb 26, 2017

atljsf :

Just trying to understand if both type use three 12v wires how the PSU limits one connector at 75w yet allows the other 150w. And why a system using a 6 to 8 pin adapter still provides well over 200w to the card. Some reviews have the MSI gaming X 8g at 224w max.

raisonjohn · Feb 26, 2017

Here's a good read, everything you're asking might be here: http://www.overclock.net/a/gpu-and-cpu-power-connections

Susquehannock · Feb 26, 2017

raisonjohn :

Thanks. The article does not answer my questions though. It does seem to confirm that 6 to 8 pin adapter are fine provided the PSU is of proper type & quality.

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