Confused About PCIe Power Cables and GPU Connections

October 27, 2025 3 answers
Asked by TechieGurl99
I'm a bit lost regarding my setup. My motherboard is connected to the PSU and my GPU is showing signs of life, but I'm not sure why. I'm using an AMD Radeon RX 6600 and I notice it shares a similar slot with the motherboard. Can someone clarify what I'm supposed to do here?

Answers

CableGuru77
Make sure to plug in the PCIe power cable directly to your GPU. The motherboard provides a little power, but your GPU will need more juice from the power supply unit (PSU) to function properly. If you don't have the 6+2-pin cables, you might want to grab some; otherwise, your GPU won't run at full capability.
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ConnectorNerd42
Just a heads up, the CPU power socket on the motherboard is different from the PCIe power connector for your GPU. They might look similar but are designed for different parts. Trying to plug them incorrectly could damage your components. Always check that the pins are labeled and shaped correctly before connecting.
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PinMaster5000
Exactly! The CPU power connector usually is either 4-pin or 2x4-pin, while the GPU generally uses either a 6-pin or 6+2-pin connector. These connectors are designed to only fit the correct slots to prevent mistakes.
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