need help with psu cables | Linus Tech Tips | Page 1

feral thunder May 25, 2025, 2:06 PM

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so i got a new gpu and i only have 1 8 pin i don't know where i put my other modudler cables so i was wondering if i could use cable ties on the 1 8 pin with 2 points that i got by this a 8 pin connector cable normally has 2 8 pins on it

crisp moon May 25, 2025, 2:35 PM

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feral thunder so i got a new gpu and i only have 1 8 pin i don't know where i put my other mod...

What? Can you rephrase this/take pictures of what you’re talking about?

feral thunder May 25, 2025, 2:37 PM

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erm

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@crisp moon

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not like that

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but 1 end plugs into psu

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and then it goes to middle

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and that splits and goes into gpu

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can u use the middle 8 pin to the gpu as well

crisp moon May 25, 2025, 2:37 PM

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So an 8 pin with a pigtail to another 8 pin?

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And the gpu only has 1 8 pin power connector?

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@feral thunder

feral thunder May 25, 2025, 2:38 PM

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can i use the 2nd 8 pin

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is what im trying to say

crisp moon May 25, 2025, 2:39 PM

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You can use either

feral thunder May 25, 2025, 2:39 PM

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no like

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the card i got has 2 8 pin connectors

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can i use those 2

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or do i need another seperate cable

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do you understand what im tryign to ask?

crisp moon May 25, 2025, 2:40 PM

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The gpu has 2 8 pins (or an 8 and a 6)?

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Oh yeah

feral thunder May 25, 2025, 2:40 PM

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2x 6 + 2

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i got cable extensions

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can i plug the cable extensions into those 2 and plug it into new gpu?

crisp moon May 25, 2025, 2:41 PM

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People say you should use 2 separate cables and that is ideal, but if your psu is high enough wattage to power it, it’s fine to use 1 cable

feral thunder May 25, 2025, 2:41 PM

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nono

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im still plugging in 2 8 pins

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the thign im asking is

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the cable has 2 8 pins on it

crisp moon May 25, 2025, 2:42 PM

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If you can use 2 cables, do that
Otherwise you can just use 1 cable and plug both connectors into the gpu

feral thunder May 25, 2025, 2:43 PM

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that's what im asking

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if i can use 1 cable

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and plug both into it

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i don't want to just accidently fry the gpu lol

crisp moon May 25, 2025, 2:44 PM

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Yes, you can. But if you have 2 separate cables, use the 2 instead

feral thunder May 25, 2025, 2:44 PM

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ok

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thanks

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it won't just blow up right

ancient merlin May 25, 2025, 2:45 PM

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If you’re in spec for 300w then you are fine.

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However you will have some performance loss using 1 cable. Not massive amounts though.

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Do not increase gpu power limit on a daisy chain

feral thunder May 25, 2025, 2:46 PM

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oh lol

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ima do something dumb

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i got a spare psu

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might as well use that to power the other half lmao

crisp moon May 25, 2025, 4:21 PM

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ancient merlin However you will have some performance loss using 1 cable. Not massive amounts t...

??

crisp moon May 25, 2025, 4:21 PM

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feral thunder might as well use that to power the other half lmao

Why? Is your main psu really small?

feral thunder May 25, 2025, 5:20 PM

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nah not that

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so i can use 2 cables

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lma

ancient merlin May 25, 2025, 7:57 PM

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crisp moon ??

Jay2cents has proven you can get a 1-10% lower frame rate using daisy chained cable compared to 2x cables. I don’t think he went into it but it is due to many factors including power distribution by the PSU to GPU, variable load, sustained load and quality of cable connection.

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That’s the main reason for 2 cables. The safety on the daisy chained cable for power draw is more than specced enough. It’s the potential performance drop as to why you should recommend 2 separate cables.

#need help with psu cables