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Nvidia GeForce RTX 40 series GPUs could be incredibly power-hungry

Nvidia GeForce RTX 3090
(Image credit: Nvidia)

Nvidia’s upcoming GeForce RTX 40 series cards are likely to be the company’s most powerful GPUs yet. Given that these GPUs reportedly deliver double the performance of the RTX 30 series, we expect them to be power-hungry cards. Recent leaks reveal this to be the case, as the highest-end RTX 40 series card may require a massive 1,200-watt power supply unit.

As NotebookCheck reports, known leaker “harukaze5719” was on Twitter commenting about Nvidia’s Lovelace boards (Lovelace being the codename we believe Nvidia to be using for its 40 series cards) and Intel’s Raptor Lake CPUs. The user said: “Expecting i9-13900K + RTX 4090 Ti recommend PSU at least 1,000 W GOLD.”

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Known leaker “Greymon55” soon joined the conversation and said that 1,000W “is not enough.”

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Greymon55 is a regular leaker who has previously posted details of what they claim we should expect from Nvidia Lovelace. The user has stated that Lovelace boards would offer “double performance” over the RTX 3090, and that lines up with rumors we've heard that the Nvidia GeForce RTX 40 series has some killer specs, including up to 18,432 CUDA cores (the RTX 3090 has 10,496). A card like that would need some serious juice, and Greymon believes it will be 600W for either the GeForce RTX 4090 or RTX 4090 Ti -- though they noted that such an estimate was for a reference card from Nvidia, not a custom card from a third-party manufacturer like Asus.

Another leak reported by Digital Trends lends credence to the supposed 1,200W PSU needed for the RTX 40 series. The leak in question indicates that the upcoming Nvidia RTX 3090 Ti has a TDP (thermal design power, often used as a measurement of power demand) of 480W, which would require a minimum of 1,000 PSU.

If the RTX 40 series cards do indeed deliver double the performance of their predecessors then it’s not so surprising that the top-end card will consume a lot of power. If you want an RTX 4090 or RTX 4090 Ti, you’ll need to be sure you have a power supply that can handle them.

As I opined in a recent editorial, I can’t get excited about Nvidia GeForce RTX 40 series cards. After all, it’s all but impossible to buy the current RTX 30 series thanks to the ongoing chip shortage (not to mention scalpers). Reports say the semiconductor shortage could last through 2023. This means the RTX 40 series cards will no doubt be as difficult to procure as their RTX 30 predecessors.

For more information on the Geforce RTX 40 series, be sure to check out our hub featuring the most up-to-date rumors on Nvidia’s upcoming GPUs.

Tony Polanco
Tony Polanco

Tony is a computing writer at Tom’s Guide covering laptops, tablets, Windows, and iOS. During his off-hours, Tony enjoys reading comic books, playing video games, reading speculative fiction novels, and spending too much time on Twitter. His non-nerdy pursuits involve attending Hard Rock/Heavy Metal concerts and going to NYC bars with friends and colleagues. His work has appeared in publications such as Laptop Mag, PC Mag, and various independent gaming sites.


  • scarlettm59
    I don't understand why Company producing New GPU when the old once are not even available to buy and the price are at the sky. They should make the efforts to reduce price and availability rather producing new one.
    Reply