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Can PCI-Express 2x 8 Pin (6+2) single cable damaged PSU?

GPU: MSI GeForce RTX 3080 Gaming X Trio 10G 

PSU: Corsair 750W RM750x 80+ Gold Modular Power Supply (CP-9020179-AU)


A question guys, The MSI GeForce RTX 3080 Gaming X Trio 10G has 3 conectors - 8pins each one and my psu has only 2 conectors - 8 pins. 

Is safety to use a single PCIe cable 8 pin and second cable PCIe cable 2 x 8 pin to fill the 3 conectors on my RTX 3080 Gaming X Trio?


Thank very much for the help, I am worried to damaged my PSU

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The RM750x has two cables with 2 connectors on the end of each cable, for a total of 4 connectors. You use 2 connectors off one cable and then one connector off the second cable for a total of 3 connectors plugged in from 2 cables.

CPU: Intel i7 6700k  | Motherboard: Gigabyte Z170x Gaming 5 | RAM: 2x16GB 3000MHz Corsair Vengeance LPX | GPU: Gigabyte Aorus GTX 1080ti | PSU: Corsair RM750x (2018) | Case: BeQuiet SilentBase 800 | Cooler: Corsair H100i AIO | SSD: Samsung 970 Evo 500GB + Samsung 840 500GB + Crucial MX500 2TB | HDD: Seagate Ironwolf 8TB + 2x Seagate Ironwolf 6TB | Monitor: Acer Predator XB271HU + Samsung BX2450

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Thank you for your answer, but 1 cable PCIe with 2 connectors at the end can handle 300watts? I know each cable can handle 150Watts but those cable end by 2.

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