NVIDIA GeForce RTX 5090 leaked specs: 32GB GDDR7, over 20K CUDA cores, and 600W power

NVIDIA's next-generation GeForce RTX 5090 graphics card has some juicy leaked specs: with a monster of a difference between the RTX 5090 and RTX 5080 graphics cards. The new RTX 5090 has 20K+ CUDA cores, 32GB GDDR7 memory, and will chow down on up to 600W of power.

In a new post on X, leaker "kopite7kimi" teased that NVIDIA's new flagship GeForce RTX 5090 graphics card will feature a GB202-300-A1 GPU based on the new Blackwell architecture, an insane 21,760 CUDA cores, 32GB of next-gen GDDR7 memory on a 512-bit memory bus, and will consume up to 600W of power.

This means that the new GeForce RTX 5090 will have an insane 1.79TB/sec or 2.0TB/sec of memory bandwidth, depending on what bandwidth the GDDR7 memory is: 28Gbps GDDR7 on a 512-bit memory bus will result in 1.79TB/sec of memory bandwidth, while the faster 32Gbps GDDR7 on a 512-bit memory bus will push a higher 2.0TB/sec of memory bandwidth. Bonkers, totally bonkers.

In previous rumors, we were expecting a 448-bit memory bus but the huge 512-bit memory bus means that NVIDIA is really aiming for that ultra-high-spec design for the GeForce RTX 5090. With 32GB of next-gen GDDR7 memory with a possible 2.0TB/sec of memory bandwidth is going to be insane for 4K 240FPS gaming.

• Read more: RTX 5090 and RTX 5080 will be available within a few weeks of each other
• Read more: NVIDIA testing 250W to 600W coolers for next-gen RTX 50 series GPUs
• Read more: RTX 5080 rumored to now launch BEFORE the RTX 5090
• Read more: NVIDIA's next-gen RTX 5090, RTX 5080 Laptop GPUs rumored with 16GB VRAM
• Read more: NVIDIA rumored to ONLY launch GeForce RTX 5090 this year
• Read more: NVIDIA to unveil top-end GeForce RTX 5090, and high-end RTX 5080 at first later this year

We also had Kosta reporting that NVIDIA's new GeForce RTX 5090 could ship with not one, but two 16-pin PCIe power connectors possibly requiring a new PSU.

NVIDIA GeForce RTX 5090 details so far:

20,000+ CUDA cores: With a rumored 21,760 CUDA cores, we're looking at a big upgrade over the 16,384 inside of the RTX 4090. Not just more CUDA cores, but upgraded Blackwell GPU architecture cores over the current Ada Lovelace GPU cores inside of the RTX 4090.

32GB of next-gen GDDR7 memory: NVIDIA is the first to use the ultra-fast GDDR7 memory standard, with the flagship GeForce RTX 5090 pegged to have an incredible 32GB of GDDR7 memory. This is another big upgrade over the RTX 4090 which has 24GB of GDDR6X memory.

Up to 2.0TB/sec memory bandwidth: We're hearing that the RTX 5090 will have a monster 512-bit memory bus, which enables an insane ceiling of up to 2.0TB/sec of memory bandwidth if the RTX 5090 uses 32Gbps GDDR7 memory modules. Another giant upgrade over the RTX 4090 which has 1.0TB/sec of memory bandwidth in comparison.

600W of power: Another big upgrade for the RTX 5090 is the 600W of power, which is another 150W of power on top of the 450W TDP of the RTX 4090. We did see custom models and overclocked RTX 4090 cards pushing up to 600W+ of power, but the RTX 5090 is going to be another level again on top of that. Hopefully we see 600W+++ custom AIB models of the RTX 5090.

4K performance: NVIDIA's next-generation ultimate gaming GPU in the GeForce RTX 5090 should have 50-70% more performance across the board compared to the RTX 4090, especially at the higher-end 4K resolution. 4K 120FPS gaming should be an even easier achievement for the RTX 5090 than it is for the RTX 4090. We've got 4K 240FPS coming this year and in 2025, so the RTX 5090 will be the GPU of choice for 4K 240FPS gaming in the future.

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RT performance: This is where the biggest performance improvements of the next-gen Blackwell-based GeForce RTX 50 series GPUs will come: ray tracing. Expect some rather large 2-3x performance gains using RT, probably 4x or more in some cases with the RTX 5090 and RTX 5080 against their RTX 40 series counterparts. Throw new DLSS 4 on top, and you've got some wowzers RT performance.

DLSS 4: This is probably my personal favorite part of the excitement of next-gen GPUs from NVIDIA, AI-powered upscaling with a next-gen DLSS 4 that works only on the new Blackwell-based RTX 50 series GPUs. We should expect even higher image quality than offered by DLSS 3.x and new levels of performance with DLSS 4 enabled on a new RTX 5090 or RTX 5080 graphics card.

Power efficiency: NVIDIA's current-gen GeForce RTX 4090 can use anywhere between 450W and 600W of power depending on the model and overclocking, but the new GeForce RTX 50 series GPUs will offer far more performance-per-watt of the leading RTX 4090 and RTX 4080 SUPER graphics cards. Another exciting part to see unravel in the near future.