What are power cables for PCIe?

What are power cables for PCIe?

This connector is used to provide extra 12 volt power to PCI Express expansion cards. Many video cards draw significantly more than 75 watts provided by the motherboard slot, so the 6 pin PCI Express power cable was created. These cables are sometimes called “PEG cables”, where “PEG” stands to represent PCI Express Graphics.

Do you need to plug PCIe power?

The 6-pin PCIe connector present on the motherboard provides additional power to the PCIe slots, rather than pulling it all from the 24-pin main power. EVGA recommends that you plug in this connector to power your 3-way, 4-way and Quad SLI no matter what GPU.

Can you use PCIe cable for GPU?

Both connectors can be used in the same cable with the same GPU. Makes no difference.

Should I use 2 PCIe Cables for GPU?

Always separate cables with high-power draw graphics cards. A single split in an end cable can double the voltage loss than separate cables. And not only does it affect stability of 12V, but also ground refence of the card, because current causes voltage loss also on return path.

What cables are needed for RTX 3080?


Nvidia Geforce RTX 3070 Founders Edition Nvidia Geforce RTX 3080 Founders Edition Nvidia Geforce RTX 3090 Founders Edition
One PCIe 8-pin power cable (1x PCIe 8-pin) Two PCIe 8-pin power cables (2x PCIe 8-pin) Two PCIe 8-pin power cables (2x PCIe 8-pin)
GPU power: 220W 320W 350W
Required system power: 650W 750W 750W
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How much power does a RTX 3070 need?

650W PSU

Is 1000w enough for 3090?

It might actually get close depending on some other factors… mainly how much watts the 3090 actually pulls. You’ll be fine with 1000w.

Is 550w enough for RTX 2070 Super?

The real answer depends on what else is in the system, especially if the CPU uses a lot of power and if you have lots of other peripherals, but in general a 550w gold+ quality PSU is the absolute minimum for a PC with an RTX 2070. 700W or more is recommended.