I'm working on my first modern PC build, moving from an AMD 4 with a 3080. I'm putting everything together in a Corsair 6500x case with a Gigabyte Aorus X870 Stealth Ice motherboard and a Ryzen 7 7800X3D CPU.
I've hit a bit of a snag regarding my GPU and PSU. I'm using a Gigabyte Aero 5070 Ti and initially intended to go with the Corsair RM750x Shift power supply, thinking I'd only need 650W. However, I've realized the actual recommended power is 750W, and I want to ensure I have enough headroom for overclocking.
My main questions are: is the 12V 12+4 to 2x8 PCIe cable that comes with the RM850x Shift power supply reliable enough for this power-hungry GPU? Should I consider a standard RM850x (or something similar) that has a dedicated 12V 12+4 socket instead? I'm open to any advice! Thanks in advance.
2 Answers
Just to add to that, if you're concerned about overclocking and headroom, a PSU with a dedicated 12V 12+4 socket might be a safer bet for future upgrades, especially if you plan on pushing your GPU further. However, the dual 8-pin PCIe setup should work fine for most scenarios with the 5070 Ti.
Don't stress too much! The recommended 750W is for your whole system, not just the GPU. The 5070 Ti pulls about 300W at peak, so you're totally fine with your PSU and that cable. It should deliver the power you need without any issues.
Most setups with a 5070 Ti run well on about 500-600W total, so there's definitely enough breathing room for overclocking too. If you really want to double-check, I suggest giving PC Part Picker a go—they’ll give you a precise wattage estimate based on your components.
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