2x6 pin to 8 pin pcie

[Rothhaus]

Hi, I just discovered that the gpu I have ordered needs 3x8 pin but my psu (Corsair TX750M) only has 2x8 pin connectors and then the rest are 6 pin, would it be possible to use a 2x6 pin to 8 pin connecter for the last 8 pin port on the gpu 

[Fasauceome]

2 minutes ago, Rothhaus said:

would it be possible to use a 2x6 pin to 8 pin connecter for the last 8 pin port on the gpu 

yes you can use two cables. one cable for two 6+2 pins and one cable for one more 6+2 pin.

[Spotty]

3 minutes ago, Rothhaus said:

my psu (Corsair TX750M) only has 2x8 pin connectors and then the rest are 6 pin

Corsair TX750M has 4x 6+2pin PCIe connectors. Even the really old TX750M has 4x 6+2pin PCIe connectors.

 

[Rothhaus]

It only has 2 pcie 8 pin entrances and the rest is 6 pin. So is it possible to use or get a cable that goes from 2x6 pin entrance to a single 8 pin connecter? And is there any disadvantages to it? Or do you mean that I would have to use one 6 pin to 6 pin and then the 2 pin from a 6 pin so it technically would be an 8 pin coming from 2  6 pinpcie ports?

[Tan3l6]

Would be a nice occasion to upgrade PSU maybe?

PSU is the heart of the PC.

[Rothhaus]

Just now, Tan3l6 said:

Would be a nice occasion to upgrade PSU maybe?

PSU is the heart of the PC.

I just bought a month ago and I just realised this problem now, would be a shame if I had to get rid of it already 

[Grabhanem]

It should have modular connectors that turn each of the 8-pins on the PSU into a pair of 6+2s on the other end. The 6-pins on the PSU are for SATA/molex and not related to PCIe at all.

[Rothhaus]

2 minutes ago, Grabhanem said:

It should have modular connectors that turn each of the 8-pins on the PSU into a pair of 6+2s on the other end. The 6-pins on the PSU are for SATA/molex and not related to PCIe at all.

But can the data ports be used for pcie?

[-rascal-]

27 minutes ago, Rothhaus said:

It only has 2 pcie 8 pin entrances and the rest is 6 pin. So is it possible to use or get a cable that goes from 2x6 pin entrance to a single 8 pin connecter? And is there any disadvantages to it? Or do you mean that I would have to use one 6 pin to 6 pin and then the 2 pin from a 6 pin so it technically would be an 8 pin coming from 2  6 pinpcie ports?

 

Ohhh...you are talking about the PSU side.

The 6-pin connectors on the PSU side are only for SATA and Peripherals.

 

The 8-pins on the PSU side split into 2x 6+2 pin PCI-E connectors, so with 2x 8-pin connectors, you should have 4x PCI-E 6+2 pin cables.

 

It would be dangerous to convert the 6-pin SATA / Peripheral power to PCI-E power.

Power ratings for SATA, etc is much lower than PCI-E / CPU.

 

So... you have enough PCI-E 8-pin connections, with 1x to spare.

So...why go through this potentially unsafe janky conversion?

[Fasauceome]

9 minutes ago, Rothhaus said:

But can the data ports be used for pcie?

You get 2x8 PCIe connectors for every port on the power supply. You have two ports on the power supply, you get 4 connectors.

[Ankerson]

37 minutes ago, Rothhaus said:

Hi, I just discovered that the gpu I have ordered needs 3x8 pin but my psu (Corsair TX750M) only has 2x8 pin connectors and then the rest are 6 pin, would it be possible to use a 2x6 pin to 8 pin connecter for the last 8 pin port on the gpu 

 

Which GPU are you getting exactly?

 

It does matter.

 

I have one of the 3x 8 Pin cards.

 

3080 FTW3 Ultra with the XOC 450W VBIOS.

 

I have seen my card pull 470W just through the 3x 8 Pin.

 

The 3090 FTW3 Ultra pulls 500W+

 

 

 

 

[-rascal-]

6 minutes ago, Ankerson said:

Which GPU are you getting exactly?

3x PCI-E 8-pins?

I'm banking on RTX 3080...

[Ankerson]

5 minutes ago, -rascal- said:

3x PCI-E 8-pins?

I'm banking on RTX 3080...

 

If it's one of the 450W cards 750W isn't really going to be enough.

 

It will work, but 850W or more is recommended.

[Guest]

34 minutes ago, Rothhaus said:

I just bought a month ago and I just realised this problem now, would be a shame if I had to get rid of it already 

It's not a problem.  You're overthinking it.

 

There's two 8-pin modular ports.  Each cable that plugs into those has two 6+2-pin PCIe cables.  You would use two connectors from one cable and one connector from the second.

 

That's it.

 

No issue.

 

Case closed.

 

[Rothhaus]

30 minutes ago, jonnyGURU said:

It's not a problem.  You're overthinking it.

 

There's two 8-pin modular ports.  Each cable that plugs into those has two 6+2-pin PCIe cables.  You would use two connectors from one cable and one connector from the second.

 

That's it.

 

No issue.

 

Case closed.

 

I’ve just seen another post with a similar question and the answer he got was “

it'll be less than ideal, it wont set fire to the cable/connectors/etc, but you will most likely get more voltage drop in the cables, i presume this could result in a slight reduction in power limit, but i assume it will work fine enough.

 

if you want to play on the safe side, running two 'dedicated' cables will be better, if you can get your hands on an extra cable.” 

 

so what I take from that is that using one 1 2x8 pin cable and another single 8 pin cable can be done but it’s not nearly as good as using 3 separate 8 pin cables. 

[Guest]

1 minute ago, Rothhaus said:

I’ve just seen another post with a similar question and the answer he got was “

it'll be less than ideal, it wont set fire to the cable/connectors/etc, but you will most likely get more voltage drop in the cables, i presume this could result in a slight reduction in power limit, but i assume it will work fine enough.

 

if you want to play on the safe side, running two 'dedicated' cables will be better, if you can get your hands on an extra cable.” 

 

so what I take from that is that using one 1 2x8 pin cable and another single 8 pin cable can be done but it’s not nearly as good as using 3 separate 8 pin cables. 

That lacks context.

 

You're talking about a graphics card that uses three connectors.  That sounds like a post where they were asking about a graphics card that uses two connectors.

 

Yes... using two connectors on one cable is not ideal in many cases.

 

I'm guessing you're going to be using an Ampere based card, correct?  Keep in mind the Founder's Edition uses only two PCIe on an adapter that converts that to a single 12-pin connection.

 

The reason the AIB cards have three PCIe is because there's no such thing as a PCIe cable with three PCIe connectors (unless you made one).  So by "requiring" three connectors, they're forcing you to use at least two cables.

 

[Guest]

53 minutes ago, Ankerson said:

 

Which GPU are you getting exactly?

 

It does matter.

 

I have one of the 3x 8 Pin cards.

 

3080 FTW3 Ultra with the XOC 450W VBIOS.

 

I have seen my card pull 470W just through the 3x 8 Pin.

 

The 3090 FTW3 Ultra pulls 500W+

 

 

 

 

Right.  But what graphics card the OP is using is TOP SECRET!  

 

It's like being on a mystery cruise. We're given bits and pieces and we have to guess the rest.  

 

[Rothhaus]

10 minutes ago, jonnyGURU said:

Right.  But what graphics card the OP is using is TOP SECRET!  

 

It's like being on a mystery cruise. We're given bits and pieces and we have to guess the rest.  

 

My bad lol, I’ve ordered the msi 3080 trio x

[Guest]

29 minutes ago, Rothhaus said:

My bad lol, I’ve ordered the msi 3080 trio x

Use two cables. 

[Rothhaus]

6 minutes ago, jonnyGURU said:

Use two cables. 

Yea I’ll use one double 8 pin and one single 8 pin as you suggested. Thanks for the replies, I really appreciate it.