NVIDIA GeForce RTX 3070 power connector: what does it need?
The NVIDIA GeForce RTX 3070 needs 1× PCIe 8-pin from the power supply. At about 220 W board power, here is what to know before you plug it in.
Recommendations are planning estimates, not electrical or purchasing advice. The hardware figures behind them are vendor-published; your exact board-partner model and build can still differ.
Power connector
1× PCIe 8-pin
Reference power input.
GPU board power
220 W
Vendor TGP/TBP — a conservative ceiling, not typical gaming draw.
PSU minimum (typical build)
550 W
Assumes a 125 W-class CPU + standard accessories.
PSU comfortable (typical build)
650 W
Standard headroom for spikes and future room.
Board-partner note
Reference spec is 1x PCIe 8-pin; many partner OC cards use 2x 8-pin. Founders Edition uses a proprietary 12-pin with 1x 8-pin adapter.
ATX 3.x advice
Any competent modern power supply with the right cable handles this card. ATX 3.x is optional at this power class.
Safety notes
- Never mix modular cables between different PSU brands or models. The PSU-side pinout is not standardized — a mismatched cable can destroy hardware.
- Do not exceed a cable's rated load with splitters or adapters, and replace any cable with damaged or discolored connectors.
- Before buying, confirm the connector layout and PSU guidance on the official pages of both your exact card model and your PSU — board partners change designs between variants.
Sizing a supply for a full build? See the NVIDIA GeForce RTX 3070 PSU recommendation → or open the full PSU Calculator →
How to check this figure
NVIDIA has retired this card's own product page; it now redirects to a family page shared with the RTX 3070 Ti. Read the column headed with this card's name — the table gives each model its own column, and 5888 CUDA cores identifies this one. The row labels are "Graphics Card Power (W)" and "Required System Power (W)".
Source: NVIDIA official specification; multi-agent web verification 2026-07-15. Last updated: 2026-07-22.
Frequently asked questions
What power connector does the NVIDIA GeForce RTX 3070 use?
The NVIDIA GeForce RTX 3070 uses 1× PCIe 8-pin. Always confirm the exact layout on your specific board-partner model.
Do I need an ATX 3.1 power supply for the NVIDIA GeForce RTX 3070?
Any competent modern PSU with the correct cable handles the NVIDIA GeForce RTX 3070. ATX 3.x is optional at this power class.
What size PSU pairs with the NVIDIA GeForce RTX 3070?
For a typical companion system we estimate a 550 W minimum and 650 W for comfort. Use the PSU Calculator for your exact CPU and parts.