The RTX 4090 draws a lot of power, with a maximum official TDP of 450W. NVIDIA recommends at least an 850W power supply to run an RTX 4090. You should buy a power supply that is more than 1000 watts so that it can handle everything such as cooler, lights, RAM, CPU, and so on. Although it is a decent starting point for many buyers
To power an RTX 4090 directly, you will require a power supply that features the new ATX 3.0/PCIe 5.0 native 16-pin power connector. It is possible to use a power supply from the previous generation, but it may not be adequate.
You should always buy a good reputable brand Power Supply(PSU) as it can burn other component of your PC hardware. And for last always make sure to connect power supply connector with GPU perfectly as it can burn your RTX 4090 GPU connector when it use with full power. Below are some suggested power supplies:
Model | Max. DC Output | Efficiency | Price |
---|---|---|---|
Corsair RM1000x | 1000W | 80 Plus Gold | |
GAMEMAX 1300W | 1300W | 80 Plus Platinum | |
Thermaltake Toughpower GF3 | 1000W | 80 Plus Gold | |
Segotep GM1250w | 1250W | 80 Plus Gold | |
MSI MPG A1000G | 1000W | 80 Plus Gold |
Corsair RM1000x Shift Fully Modular ATX 3.0 Power Supply
The Corsair RM1000x is a fully modular ATX power supply that belongs to the next generation of PSUs and is fully compatible with the RTX 4090. It is a highly regarded brand in its category and offers exceptional load efficiency for your GPU.
Reputable Brand
80 Plus Gold Efficiency
Affordable Price
GAMEMAX 1300W Power Supply
Gamemax is another well reputable brand. This model has a maximum capacity of 1300w and you can use this power supply if you are building PC with maximum components. It has RGBs, 80 Plus Platinum Certified and it means that single power cable can support 600w. Which means it can run RTX 4090 easily.
80 Platinum Certified
Affordable Price
RGBs if you consider
Thermaltake Toughpower GF3 1000W
Thermaltake Toughpower GF3 is a 1000W 80+ Gold certified PSU and have complete next generation options that can support you GPU and other hardware component.
Reputable Brand
80 Plus Gold Efficiency
Quite Power Supply Fan Noise
Segotep GM1250W
Can Hold Big Power
80 Plus Gold Efficiency
AI Cooler technology
MSI MPG A1000G
80 Plus Gold Efficiency
Affordable
Modular Design