Use 1 PCIE cable for both GPU ports?
namonami
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flo88 Posted messages 28657 Registration date Status Contributeur Last intervention -
flo88 Posted messages 28657 Registration date Status Contributeur Last intervention -
Hello! I just finished building my first PC (for 3D work), and everything seems to be working well!
I have a question regarding the PCIe cables:
- My GPU is an MSI RTX 2080 SUPER VENTUS XS OC, and it has 2 ports (one 6-pin, one 8-pin).
- My power supply is a Gigabyte B700H.
The PCIe cables provided with my power supply have 3-4 heads each, which gives me the option to use a single cable for both ports on my GPU. That would be convenient for me, as the inside of my case is starting to get cramped.
Also, I haven't done any overclocking (I prefer not to, as I don't know enough about it).
Will using a single cable instead of two risk creating instability in my configuration, or does it not make a difference? Thank you for your help!
I have a question regarding the PCIe cables:
- My GPU is an MSI RTX 2080 SUPER VENTUS XS OC, and it has 2 ports (one 6-pin, one 8-pin).
- My power supply is a Gigabyte B700H.
The PCIe cables provided with my power supply have 3-4 heads each, which gives me the option to use a single cable for both ports on my GPU. That would be convenient for me, as the inside of my case is starting to get cramped.
Also, I haven't done any overclocking (I prefer not to, as I don't know enough about it).
Will using a single cable instead of two risk creating instability in my configuration, or does it not make a difference? Thank you for your help!
3 réponses
Your problem lacks precision. Some power supplies have 2 PCI-E connectors per cable. If that's the case with your power supply, a single cable would be sufficient to power both the PCI-E 8-pin socket and the 6-pin PCI-E socket of your GPU. A second cable would not be necessary.
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Misnaming things adds to the misery of the world (Albert Camus)
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Misnaming things adds to the misery of the world (Albert Camus)
Sorry for the lack of clarity, yes my power supply has 3 PCI-E connectors per cable, which indeed allows me to power the 8 pin and 6 pin connectors of my GPU with one cable. But I was just wondering about the stability of the power supply when using one cable with multiple connectors for the two sockets rather than two separate cables for the two sockets.
Yes. The presence of a single 12V rail is a guarantee of reliability since almost all of the power is dedicated to it, which is essential for high-performance configurations.
Using a single cable is not an issue in this case.
If the power supply had two rails, connecting both allows for the distribution of the load (provided that the two cables are well separated at this level....)
Using a single cable is not an issue in this case.
If the power supply had two rails, connecting both allows for the distribution of the load (provided that the two cables are well separated at this level....)
Since I don't have much space to run the second cable through the back of the case, is it really a big deal to leave it at the front?
Hello, I'm a bit late but I'm asking just in case. I currently have an RX 6750 XT and a Be Quiet 650W power supply that has a single PCIe connector. At first, I powered my graphics card with a single Y PCIe cable, and it worked very well at the beginning. Then, after a week, my graphics card stopped working, and some small red LEDs indicated that the card was poorly powered. I did some research, and it turns out I need two PCIe cables to power it properly, so I got a second Y PCIe cable. Is it serious if there are two cables that won't be connected since they're Y cables?