Using 2 8 pins from a single cable vs 1 8 pin from 2 cables

[Leaking Oil]

Hey there, I have a heavily overclocked MSI Duke OC GTX 1080Ti 

2050 MHz core and 5703mhz memory which pulls around 320-350w in total. 

 

I pulled my GPU out and noticed that one of the power connectors is slightly melted from one of the cables (My PSU has 2x8pin + 2x8pin connectors) 

 

My question is, would connecting 2x8pin from one cable be enough for my power hungry 1080ti? 

[BirdieTX]

Theoretically yes, but actually no. This is the main reason Nvidia decided to adopt 12V high power connectors as far as I'm aware. Modern GPUs are too power hungry to run off of one split cable. Normally the 1080Ti is fine with a split, but that's a pretty beefy overclock you got there and I wouldn't chance it.

[Hinjima]

4 minutes ago, Leaking Oil said:

My question is, would connecting 2x8pin from one cable be enough for my power hungry 1080ti? 

Yes, if the PSU / Cables you are using are of good quality.

If you are using a shit tier PSU, don't.

 

I did that with my own heavily overclocked 980Ti, 2080 Super and R9 290x.

 

[Leaking Oil]

Just now, BirdieTX said:

Theoretically yes, but actually no. This is the main reason Nvidia decided to adopt 12V high power connectors as far as I'm aware. Modern GPUs are too power hungry to run off of one split cable. Normally the 1080Ti is fine with a split, but that's a pretty beefy overclock you got there and I wouldn't chance it.

Okay, so should I keep on using the burnt connector then? I'm not really in a financial state to buy a new PSU plus this one does the job... Maybe a repair shop? 

[Hinjima]

Just now, Leaking Oil said:

Okay, so should I keep on using the burnt connector then? I'm not really in a financial state to buy a new PSU plus this one does the job... Maybe a repair shop? 

Absolutely not.  Do not continue using the cable.

[Leaking Oil]

2 minutes ago, Hinjima said:

Yes, if the PSU / Cables you are using are of good quality.

 

I did that with my own heavily overclocked 980Ti, 2080 Super and R9 290x.

 

Alright, I'll try it once I repaste my 1080ti, see if I have some stability issues or anything.

[Hinjima]

Just now, Leaking Oil said:

Alright, I'll try it once I repaste my 1080ti, see if I have some stability issues or anything.

What PSU do you currently use?

I see blue connectors and that worries me.

[Leaking Oil]

Just now, Hinjima said:

What PSU do you currently use?

I see blue connectors and that worries me.

Yeah... Uh, about that

Back in 2020 when I built my first ever "gaming" PC (with a Sapphire Toxic R9 280X Tri-X), I was on a very very tight budget

So I settled for a Chieftech CP-S650 PSU for around 30 bucks used 

 

Used it until I think 2022 when my dumb*ss dropped a screw into the PSU and it went kaboom 

 

Took it to a shop, they fixed it and pulled another 2x8pin cable out 

 

So it has "aftermarket" blue 2x8pins and the original black 2x8pins on a different cable 

[Hinjima]

4 minutes ago, Leaking Oil said:

Yeah... Uh, about that

Back in 2020 when I built my first ever "gaming" PC (with a Sapphire Toxic R9 280X Tri-X), I was on a very very tight budget

So I settled for a Chieftech CP-S650 PSU for around 30 bucks used 

 

Used it until I think 2022 when my dumb*ss dropped a screw into the PSU and it went kaboom 

 

Took it to a shop, they fixed it and pulled another 2x8pin cable out 

 

So it has "aftermarket" blue 2x8pins and the original black 2x8pins on a different cable 

That is indeed less than ideal.. 
Well, it is what it is.

 

I wonder how they fixed it after it went kaboom, that sketches me out the most.. But I guess it works right?

Yep, those aftermarket blue cables are usually quite cheap.

 

I would not reuse the burnt blue cable, thats for sure.

Use the 2x8pin on the original cable with the PSU and maybe remove your overclock?  Its already burnt one cable, though of questionable quality.

[Leaking Oil]

Just now, Hinjima said:

That is indeed less than ideal.. 
Well, it is what it is.

 

I wonder how they fixed it after it went kaboom, that sketches me out the most.. But I guess it works right?

Yep, those aftermarket blue cables are usually quite cheap.

 

I would not reuse the burnt blue cable, thats for sure.

Use the 2x8pin on the original cable with the PSU and maybe remove your overclock?  Its already burnt one cable.

Yeah I'll see what it'll do... But that PSU has definitely seen a lot... I mean, almost 2 full years of an R9 280x (also heavily heavily overclocked) and now a 1080ti... I think I should retire it once I get the money or use it in a cheaper build some time down the line. 

[Hinjima]

Just now, Leaking Oil said:

Yeah I'll see what it'll do... But that PSU has definitely seen a lot... I mean, almost 2 full years of an R9 280x (also heavily heavily overclocked) and now a 1080ti... I think I should retire it once I get the money or use it in a cheaper build some time down the line. 

Absolutely retire it when you can!  It should still be fine in a cheaper build with lower wattage components.

 

Here, we use this PSU Tierlist to check and read up on PSU's.

https://docs.google.com/spreadsheets/d/1akCHL7Vhzk_EhrpIGkz8zTEvYfLDcaSpZRB6Xt6JWkc/edit?gid=1973454078#gid=1973454078

At the bottom / top you can check the ABOUT and Tiering Criteria if you want to learn more.

[Leaking Oil]

6 minutes ago, Hinjima said:

Absolutely retire it when you can!  It should still be fine in a cheaper build with lower wattage components.

 

Here, we use this PSU Tierlist to check and read up on PSU's.

https://docs.google.com/spreadsheets/d/1akCHL7Vhzk_EhrpIGkz8zTEvYfLDcaSpZRB6Xt6JWkc/edit?gid=1973454078#gid=1973454078

At the bottom / top you can check the ABOUT and Tiering Criteria if you want to learn more.

Alright, thanks, I'll look into it once I have the money to buy a decent PSU... Maybe something like 800w+ just to futureproof my PC a little. 

I'm sure the chieftech can hang on for a month or two

[Hinjima]

6 minutes ago, Leaking Oil said:

Alright, thanks, I'll look into it once I have the money to buy a decent PSU... Maybe something like 800w+ just to futureproof my PC a little. 

I'm sure the chieftech can hang on for a month or two

Cool!  You can also double check with us or me on the Forum when the time comes  

850w's usually cost as much as 750w's so an 850w is the way to go for 'futureproof'.

 

I use a overclocked 9800X3D and overclocked RTX 4080 and I only see full system power draw of 420-480w during heavy gaming ( my only use case ) so I could in theory get away with a solid 550w.

 

Its not purely about the wattage of course, the quality of the PSU matters more in my opinion.

I would take a solid 750w PSU over a cheap / budget 1000w, any day.

 

This is a fun video to watch, running a 4090 on a solid 550w PSU.

 

[Leaking Oil]

9 minutes ago, Hinjima said:

Cool!  You can also double check with us or me on the Forum when the time comes  

850w's usually cost as much as 750w's so an 850w is the way to go for 'futureproof'.

 

I use a overclocked 9800X3D and overclocked RTX 4080 and I only see full system power draw of 420-480w during heavy gaming ( my only use case ) so I could in theory get away with a solid 550w.

 

Its not purely about the wattage of course, the quality of the PSU matters more in my opinion.

I would take a solid 750w PSU over a cheap / budget 1000w, any day.

 

This is a fun video to watch, running a 4090 on a solid 550w PSU.

 

I'll give it a watch later, when I put my PC back together. 

 

I am currently running an overclocked 3300x (didn't plan on but bought a cheap 2nd hand NH-D14 so I had a lot of headroom and ended up with a 4.65ghz 3300x) and it pulls around 85w under full boost. 

 

So in combination with the 320-350w from the 1080ti (and I guess like 30w from the other components in my PC)

I'm at a 435-465w, could get away with a better but lower wattage PSU, but you never know... I mean, there must be a reason GPU manufacturers recommend specific amounts, right? 

[Hinjima]

3 minutes ago, Leaking Oil said:

 

So in combination with the 320-350w from the 1080ti (and I guess like 30w from the other components in my PC)

I'm at a 435-465w, could get away with a better but lower wattage PSU, but you never know... I mean, there must be a reason GPU manufacturers recommend specific amounts, right? 

GPU Manufacturers usually recommend quite a lot more than actual required.

MSI recommends a 850w with a 750w minimum for my 4080 while I could get away with a solid 550w or 650w.

But this is because they have to save their own ass when someone runs a 250-300w intel 14900k and not me with my 90w 9800X3D.

[Leaking Oil]

1 minute ago, Hinjima said:

GPU Manufacturers usually recommend quite a lot more than actual required.

MSI recommends a 850w with a 750w minimum for my 4080 while I could get away with a solid 550w or 650w.

But this is because they have to save their own ass when someone runs a 250-300w intel 14900k and not me with my 90w 9800X3D.

Yeah lmao Intel CPU's are super inefficient for some reason... Also 90w from a 9800x3d? Damn, that's only a little more than my whimpy little 3300x lol. 

 

Anywho, later down the line I'm planning on upgrading the 3300x+32gb+1080ti combo to a 5800x or 5700x3d + 64gb + 9070xt. 

[Leaking Oil]

On 6/22/2025 at 2:36 AM, Hinjima said:

Cool!  You can also double check with us or me on the Forum when the time comes  

850w's usually cost as much as 750w's so an 850w is the way to go for 'futureproof'.

 

I use a overclocked 9800X3D and overclocked RTX 4080 and I only see full system power draw of 420-480w during heavy gaming ( my only use case ) so I could in theory get away with a solid 550w.

 

Its not purely about the wattage of course, the quality of the PSU matters more in my opinion.

I would take a solid 750w PSU over a cheap / budget 1000w, any day.

 

This is a fun video to watch, running a 4090 on a solid 550w PSU.

 

Hey uh, my GPU definitely isn't getting enough power... 

 

As soon as it hits full boost od 2050 and 5703, pulling 360w, it just freaks out and crashes... 

 

I underclocked it to 1925mhz and it seems to be pretty stable at that, only pulling around 260-295w.

 

 

 

About the PSU, Would a Cooler Master Silent Pro 800w gold be fine? (RS-800-80GA-D3) 

I found one in good condition for just slightly above 50 bucks.