Question only 1 8 pin connector

Jun 24, 2020
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Hello, I'm currently building my pc. I have a Thermaltake toughpower 750 watt. I only have 1 8 pin connector for the motherboard but I also need an 8 pin connector for my GPU and the the 8 pin connector for the motherboard is also too short to reach even the shortest way. I have the Asus Rog Strix X570 E-gaming and a gtx 680 currently (waiting for the 3080) Do I get an extension cable or? Any help would be appreciated
 
Oh yeah, but my gtx 680 uses a 6 pin PCI-E and a 8 pin something? but I only have the 6 pin PCI-E and what extension cables do you recommend for the 8 pin Connector to the motherboard? it's too short.