What PSU Do You Need for the NVIDIA GeForce RTX 4070?
Recommended wattage, the realistic minimum, and the connector you need — with a live peak-draw estimate.
Card peak (TBP)
200W
Recommended PSU
650W
Practical baseline
600W
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Estimate your full-system peak draw
Quick Summary · TL;DR
For the NVIDIA GeForce RTX 4070, get a 650W 80+ Gold power supply (600W minimum). The card peaks near 200W; the rest of the recommendation is headroom for your CPU and the transient spikes modern GPUs produce.
Why 650W and not less?
The NVIDIA GeForce RTX 4070 has a board power of about 200W, but it can spike well above that for milliseconds at a time. Add a typical gaming CPU and the rest of the system, then keep the supply in its efficient 50-80% load band, and 650W is the comfortable target. The NVIDIA GeForce RTX 4070 uses a 16-pin 12VHPWR connector, so an ATX 3.0/3.1 power supply with a native 12V-2x6 cable is strongly recommended — it removes the fragile adapter and is rated to ride out the card’s transient spikes without tripping.
Three power supplies that fit the NVIDIA GeForce RTX 4070
Load figures assume this card at its 200W peak alongside a Ryzen 5 or Core i5 class CPU and 75W for the rest of the system, so roughly 370W at the wall-facing side of the supply. The card draws through a 16-pin 12VHPWR connector.
Balanced
Best fitCorsair RM750e (2025) 750W 80+ Gold ATX 3.1
750W · 80+ Gold
The 140 mm body clears nearly any case and the 600W 12V-2x6 cable covers a current-gen NVIDIA upgrade. One native 6+2 plus two more off the GPU cable.
Check the RM750e on AmazonRoom to upgrade
Corsair RM850x (2024) 850W 80+ Gold ATX 3.1
850W · 80+ Gold
Three native 6+2 connectors and 100% Japanese capacitors. Enough headroom for a two-tier GPU upgrade; the 160 mm body rules out some compact cases.
Check the RM850x on AmazonAnything under 60% keeps a hybrid-mode fan off for most of a gaming session, which is why the RM750e is the pick here rather than the cheapest unit that technically fits. Specifications are taken from each manufacturer's product page; confirm the exact revision before ordering, as connector counts change between refreshes of the same model name. As an Amazon Associate, SpecsCalc earns from qualifying purchases.
Sources & verification
The 550W baseline is the manufacturer-class figure for the NVIDIA GeForce RTX 4070; the 650W target adds room for CPU choice and transient load. How both numbers are derived is set out in the methodology.
Frequently asked questions
What power supply do I need for the NVIDIA GeForce RTX 4070?
A 650W 80+ Gold unit is the recommended choice; it covers the card’s peak draw plus a transient-safe buffer and keeps the PSU in its efficient load band. 600W is the realistic minimum for a single-GPU build.
Is a 600W PSU enough for the NVIDIA GeForce RTX 4070?
It can run a modest build, since the card itself peaks around 200W, but it leaves little headroom for a power-hungry CPU or transient spikes. Stepping up to 650W is the safer, quieter long-term choice.
Does the NVIDIA GeForce RTX 4070 need an ATX 3.0 power supply?
Yes — it uses a 16-pin 12VHPWR connector, and an ATX 3.0/3.1 unit provides the native cable and the transient-spike rating these cards expect.
Different parts? Run the full PSU Wattage Calculator, or browse every GPU’s PSU requirement.