6pin to 8pin or Molex to 8pin -seasonic s12ii 520w - sapphire r9 280x vapor X

swapero · Nov 30, 2015

The sapphire r9 280x Vapor X requires a dual 8 pin

Should i use the Molex to 8pin which is included in the GPU box?

Or should i buy a 8pin to 6pin adapter?

Additional Info
RIG
- Intel i3 3210 3.2ghz
- seasonic s12ii 520w
- 2x 4gb RAM 1600mhz
- asrock h61m-vs r2.0
- 160gb HDD SATA
- WIndows 7 64bit

I do not have an enough money for an upgrade

rolli59 · Nov 30, 2015

Single +12 volt rail PSU so does not matter.

swapero · Nov 30, 2015

rolli59 :

Im so sorry im a newbie. So any of the two will work?

rolli59 · Nov 30, 2015

Either solution is fine.

swapero · Nov 30, 2015

rolli59 :

for your opinion which is better?

rolli59 · Nov 30, 2015

They are equal, all that happens is that you get a little longer wire to deliver the power to the GPU.

swapero · Nov 30, 2015

rolli59 :

one last question mate i had a lot of contradicting answers ( friends, forums, experts ) i just wanna ask your thoughts about this one .

Can my psu run this gpu?

madmatt30 · Nov 30, 2015

Yes it can - I'd use the twin molex to 8 pin supplied with the card - simply because the load is split over more heavy gauge wires.

rolli59 · Nov 30, 2015

madmatt30 :

Wrong! molex connector has only 1 x +12 volt wire, using 2 means you are using 2 wires (which is plenty) 6 pin PCIe has 3 x +12 volt wire.therefore heavier gauge! http://www.playtool.com/pages/psuconnectors/connectors.html

swapero · Nov 30, 2015

rolli59 :

So its ok to use these right?its the one that came from the box, just wanna make sure i have the correct molex

And my current psu can run the full pc load together with the vapox r9 280x??

Im so SORRY if i have a lot of question im really a noob at pc building

madmatt30 · Nov 30, 2015

rolli59 :

Im not talking about the amount of 12v pinouts on a pci express socket ,Im talking about splitting the load over more physical cables which imo is more important.
the seasonic has decent enough but standard 18 gauge wiring,the sapphire twin molex to 8 pin has 24 gauge wiring.
1 molex to 1 string of molex cables & the other to the other string coming from the psu splits the load over more physical cables coming from the psu itself - thats the main reason I suggested using it - the other reason is it comes with the card itself,is good quality,& saves buying a seperate cable which may/may not be decent quality.

madmatt30 · Nov 30, 2015

swapero :

yes - you have 2 seperate strings of molex cables on the psu with 3 connectors on each - plug each of those molex plugs to a seperate cable string - in all honesty it wouldnt matter either way but Its what I would do personally - theres no reason not to & it minimises draw on each set of cables.

your psu is good enough,your cpu is sub 70w & in all honesty there is no need for twin 8 pins on any 280x - it will never draw that amount of wattage.

rolli59 · Nov 30, 2015

swapero :

rolli59 :

So its ok to use these right?its the one that came from the box, just wanna make sure i have the correct molex

And my current psu can run the full pc load together with the vapox r9 280x??

Im so SORRY if i have a lot of question im really a noob at pc building

Yes it is fine.

rolli59 · Nov 30, 2015

madmatt30 :

rolli59 :

Im not talking about the amount of 12v pinouts on a pci express socket ,Im talking about splitting the load over more physical cables which imo is more important.
the seasonic has decent enough but standard 18 gauge wiring,the sapphire twin molex to 8 pin has 24 gauge wiring.
1 molex to 1 string of molex cables & the other to the other string coming from the psu splits the load over more physical cables coming from the psu itself - thats the main reason I suggested using it - the other reason is it comes with the card itself,is good quality,& saves buying a seperate cable which may/may not be decent quality.

when using a molex for PCIe you are only using 1 yellow wire + and one black- . You are not at all using the red 5 volt wire or its ground! So each molex is only using 2 wires from the PSU 2+2=4 while the single 6 pin PCIe is using 6 total wires.

madmatt30 · Nov 30, 2015

rolli59 :

madmatt30 :

when using a molex for PCIe you are only using 1 yellow wire + and one black- . You are not at all using the red 5 volt wire or its ground! So each molex is only using 2 wires from the PSU 2+2=4 while the single 6 pin PCIe is using 6 total wires.

Ill apologise & concede youre right - I was wrongly assuming that the 8+6 pin from the psu shared a lone cable when infact they are entirely seperate cables (I should have known this with it being a seasonic model)

swapero · Dec 1, 2015

rolli59 :

madmatt30 :

when using a molex for PCIe you are only using 1 yellow wire + and one black- . You are not at all using the red 5 volt wire or its ground! So each molex is only using 2 wires from the PSU 2+2=4 while the single 6 pin PCIe is using 6 total wires.

another noob questions

1. I need to plug BOTH of the molex to the psu then connect the 8pin end to the GPU right?

2. There are 2 8-pin slots on the R9 280x Vapor X, Which slot should i connect the native 8pin of the PSU?
- And which slot should i connect the 8-pin end of molex adapater?
- It doesn't matter which slots i use?

Im really sorry i know im bit annoying :'(

rolli59 · Dec 1, 2015

1 yes
2 does not matter

6pin to 8pin or Molex to 8pin -seasonic s12ii 520w - sapphire r9 280x vapor X

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