[SOLVED] My PSU only has 2 x 8-pin and 2 x 6-pin, but my 3090 GPU requires 3 x 8-pin ?

[Netframed]

Hey guys. My PSU have only 2 x 8-pin, so one 8-pin has a daisy chain to make the 3rd 8-pin for the 3090 GPU.
Is this why I have a bit of bad performance ? Do I need 3 separate 8-pin from PSU to GPU ?

PSU is a g750h gigabyte

 

[Lutfij]

First off, Gigabytes aren't a good PSU to have in your system. The second thing is that if your PSU lacks the necessary connectors for your components, then you either have the wrong PSU or the wrong component in your build, since they should all work in tandem.

You should be looking at a PSU that has 4x8pin PCIe connectors for the GPU.

 

[Netframed]

First off, Gigabytes aren't a good PSU to have in your system. The second thing is that if your PSU lacks the necessary connectors for your components, then you either have the wrong PSU or the wrong component in your build, since they should all work in tandem.

You should be looking at a PSU that has 4x8pin PCIe connectors for the GPU.

Ok so I should upgrade can U recommend me one should I stop using the PC
Edit: it is powering the rtx 3090 though ? Is this risky

 

[dotas1]

It will not be able to power the 3090. The system will not display an image to the monitor.
The connections are not optional and as @Lutfij said, if the PSU lacks the necessary connections, it's not meant to power such a gpu. For a 3090 a very good quality PSU of at least 850w is recommended due to the power spikes of the 3000 series.

You need a tier A PSU of 850w or more, from this Tier list .

 

[Netframed]

It will not be able to power the 3090. The system will not display an image to the monitor.
The connections are not optional and as @Lutfij said, if the PSU lacks the necessary connections, it's not meant to power such a gpu. For a 3090 a very good quality PSU of at least 850w is recommended due to the power spikes of the 3000 series.

You need a tier A PSU of 850w or more, from this Tier list .

well it has powered up ? ive been using it for a day now should i turn off pc and get myself a new psu?

also ive updated bios to the beta version? what are my options since i cant revert

 

[dotas1]

Ok, since 2x8pin is already high power, I guess it can work but I honestly do not think you can game a demanding title without the third 8pin.

The beta BIOS since it works, you are fine.

 

[Netframed]

Ok, since 2x8pin is already high power, I guess it can work but I honestly do not think you can game a demanding title without the third 8pin.

The beta BIOS since it works, you are fine.

ok well i did play escape from tarkov lol all i know is not to overclock cpu and gpu since the power consumption could exceed. but thanks for your help mate.

 

[geofelt]

If this is your psu, then it has 4 6+2 connectors which is the equivalent of 4 8 pin connectors.
You should be ok.
https://www.newegg.com/gigabyte-gp-g750h-750w/p/N82E16817233015

 

[tecmo34]

1) You are "safe" with running the two 6x2 pin to the GPU and connecting the third slot with a daisy chain. It isn't ideal but it is on the "okay" list to setup like that from PSU makers like Seasonic. What you don't want to do is run a dual 8-pin GPU with one 6x2 cable with the daisy chain.

2) It is safe for normal use but I wouldn't risk putting the GPU under heavy load till you can replace the PSU with a good quality 850W PSU, at least.

3) The beta BIOS are fine but I won't go overclocking the card to trying to get more power to it, as it will kill your PSU and maybe more.

 

[dotas1]

ok well i did play escape from tarkov lol all i know is not to overclock cpu and gpu since the power consumption could exceed. but thanks for your help mate.

That's not a particularly GPU demanding game and is also 3,5 year old.

Do not try to run a triple A game like cyberpunk or you risk your psu and the rest of your system.

 

[geofelt]

I don't know about this "daisy chain"
The psu has two pcie cable connectors at the psu side of things.
Each cable ends in a pair of 6+2 connectors.
A single cable is designed to power both 6+2 connectors at the same time.
Each 6+2 output will have a limit of 150w so 3 of them will total a max of 450w.
Add in75w max for the pcie slot and the card can draw at max 525w @12v.
Considering that the psu has a capability of 744w on 12v, I see no problem unless you are heavily overclocking a power hungry processor.
That is not likely since you have only a single 8 pin eps connector for the motherboard.

I think you are good, at least for now.

But, for a top of the line build, spend a bit on a top quality replacement.
Consider a quality power supply as a good long term component investment.