Question Doubt about my PSU entrances

[wandererlost]

Hello.
I got a Superflower Leadex III Gold 750W Modular Gold, (SF-750F14HG). I bought it about 2 years ago.
Behind it there are only two VGA inputs and two CPU inputs.
If I buy an RTX 4080S could I use my VGA inputs on both the VGA input and CPU to supply power?

https://imgur.com/naztw8x

 

[SkyNetRising]

If I buy an RTX 4080S could I use my VGA inputs on both the VGA input and CPU to supply power?

RTX 4080S requires three 8pin (6+2pin) connectors.

Your PSU has two cables, each with two 6+2pin PCIE connectors.
So - four 6+2pin PCIE connectors total. One will be left free.

 

[wandererlost]

RTX 4080S requires three 8pin (6+2pin) connectors.

Your PSU has two cables, each with two 6+2pin PCIE connectors.
So - four 6+2pin PCIE connectors total. One will be left free.

So the name CPU and VGA doesn't matter? Are they the same entries?

 

[--SID--]

Are they the same entries?

No, the pinout is different.

 

[wandererlost]

No, the pinout is different.

So I can't use a 4080S with this PSU? Would I have to buy a new one?

 

[--SID--]

So I can't use a 4080S with this PSU? Would I have to buy a new one?

You can use it. Do what @SkyNetRising suggest

RTX 4080S requires three 8pin (6+2pin) connectors.

Your PSU has two cables, each with two 6+2pin PCIE connectors.
So - four 6+2pin PCIE connectors total. One will be left free.

 

[wandererlost]

You can use it. Do what @SkyNetRising suggest

But won't it cause damage by using only two PSU inputs?

Besides, I would only have to use it with an adapter, right?

 

[SkyNetRising]

But won't it cause damage by using only two PSU inputs?

Do you have all modular cables with your PSU?

Besides, I would only have to use it with an adapter, right?

Yes. You'll have to use adapter - 3x PCIE 8pin to 12VHPWR connector.
It comes bundled with all RTX 4080S.

 

[wandererlost]

Do you have all modular cables with your PSU?

Yes. The VGA cables each have 6+2 pins. There are 2 cables.

 

[--SID--]

But won't it cause damage by using only two PSU inputs?

Those are outputs! Each output is rated for 300w.

Besides, I would only have to use it with an adapter, right?

What do you mean?

Yes. The VGA cables each have 6+2 pins. There are 2 cables.

Each connector is rated for 150w.

 

[wandererlost]

Those are outputs! Each output is rated for 300w.

What do you mean?

Each connector is rated for 150w.

My cables are exactly like these:

I have two cables. Each cable has 2 pcie (2x6). But I was told that two of these are not very reliable as it causes the so-called daisy chain? And that I would always have to use the largest and not the middle part of the cable.
I was also told that this adapter could end up damaging the GPU over time. That is true? The safest thing would be to buy a cable and put it directly into the power supply and put it into the GPU itself, but as my power supply doesn't support it, I wouldn't be able to do that.

And the fact that I only have two VGA inputs on the PSU wouldn't it damage it since it requires 3 inputs and I would have to use 3 PCIe with 2 inputs?

 

[SkyNetRising]

I have two cables. Each cable has 2 pcie (2x6). But I was told that two of these are not very reliable as it causes the so-called daisy chain? And that I would always have to use the largest and not the middle part of the cable.
And the fact that I only have two VGA inputs on the PSU wouldn't it damage it since it requires 3 inputs and I would have to use 3 PCIe with 2 inputs?

You have four PCIE 6+2pin plugs available coming from PSU.
Your graphics card requires three of them.
It's all good.

If you want all three plugs coming from different cables, then you'll have to purchase a new PSU.

I was also told that this adapter could end up damaging the GPU over time. That is true?

There have been problems with 12VHPWR connector on RTX 4090 cards.
If connector is not properly inserted, then it can melt and damage the card.

Make sure, you insert all connectors properly.

 

[wandererlost]

You have four PCIE 6+2pin plugs available coming from PSU.
Your graphics card requires three of them.
It's all good.

If you want all three plugs coming from different cables, then you'll have to purchase a new PSU.

So it's okay to just have two VGA inputs on the PSU? I thought this would damage the PSU. And it would need to have at least 3 inputs to work well. These two VGA PSU outputs support up to how many Watts?

And isn't the shortest part of the cable what they call a daisy chain? Do all parts of the cable deliver power equally? I thought the longer part would have some advantage and safety.

 

[Math Geek]

you are mixing up all kinds of words here.

your psu has 2 "vga" outputs. you connect one of your provided pcie cables to each of them. each pcie cable has 2 x 6+2 connections on it. making a total of 4 6+2 pcie connections possible.

the psu is designed to provide the power to each connection as required. so each cable with 2 x 6+2 connections is capable of providing 2 x 150w = 300w since each 6+2 is capable of 150w. this is assuming you are using both connections on the cable. the psu is designed to provide this power and WILL NOT damage itself by using it the way it is designed.

so if you use both 6+2 connections from a single cable and then one of the 6+2 connections from the other cable, then you will easily and safely power the 4080S gpu. the 3 6+2 connections used can provide 450w of power in total, however, the 4080 super actually uses less than 300w so you won't even be fully taxing any of the connections' capabilities. again the psu is designed to provide this power and will easily be able to handle doing it.

you have nothing to worry about and need to just hook it up and start enjoying your new gpu

 

[wandererlost]

Thank you everyone for the answers.

Can I buy one of these from the Corsair brand and use it in my power supply and replace it with the 6x2 pci? I don't know if Superflower sells it where I live. Like this:

Another doubt. Is Corsair already selling 1000W power supplies with PCI-E 5.0 and ATX 3.0?
If you were to recommend me a power supply that could possibly handle an RTX 5080, what would it be?

 

[Math Geek]

you have to buy cables specifically designed for your psu. the pin layout is different between brands/models so they need to be made for your exact model.

and no one knows what type of power a 5080 will use so can't really suggest anything until we know what they will need. i'd assume more than a 4080 since early rumors/leaks/speculation suggests higher power draw than we have now if you can imagine that.

side note, those are some nice looking white cables

 

[wandererlost]

It turns out that where I live, in Brazil, there is no store that sells this 12VHPWR adapter. There's no way to import it, because they don't deliver here either.

Any suggestions?

 

[Math Geek]

as far as i know, the adapter comes with the gpu. you should not need to buy it.

look close at the model you wish to buy and it should be listed as "in the box"

 

[wandererlost]

The adapter did not come with a PSU. That's the problem.

 

[Math Geek]

no it should come with the graphics card. not the power supply. it will be in the box for the graphics card when you buy it.

for instance, here is a zotac 4080 super and what's in the box. note the adapter included if you look at the pictures

https://www.newegg.com/zotac-amp-zt...-rtx-4080-super-16gb-gddr6x/p/N82E16814500583.

 

[wandererlost]

But doesn't the GPU just come with an adapter?
I really wanted to buy a cable, like this one:
https://www.newegg.com/p/1W7-00TK-00001

 

[Math Geek]

right it will come with an adapter.

if you can find such a cable for your psu and can get it delivered to you, then i'd go for it

much easier and less cable mess with it for sure. there are multiple companies that specialize in cables such as cablemod but i have no idea who ships to your country or what they offer specifically.

 

[wandererlost]

Yes, they deliver. Are the cables 100% safe and functional?
Could you please answer me if a 5600X will bottleneck a 4080S at 1440p?

 

[Math Geek]

that cable is made my superflower for their psu's. so i'd consider it safe to use

i don't get into the whole "bottleneck" thing, so can't help you there. at 1440p, the gpu is taking a heavier load than at 1080p so the cpu should be good enough. but specific numbers and such i have no idea about. you can check some benchmarks for specific games to see what they determined for various cpu/gpu combos.

i literally just start a game, let it set whatever it feels is best for my system and then play the game. i know nothing about what settings it picks, what fps it gets and so on. so long as they game plays, i'm good with it. lol (i'm old and just want to play)