The new GeForce RTX 40 series of graphics cards from NVIDIA, codenamed Ada Lovelace, appears to be promising. GeForce RTX 4090 would be twice as fast as RTX 3090 and uses 450W (16128 Shader Cores). 

NVIDIA GeForce RTX 4090 will have an AD102-300 GPU SKU, according to leaker kopite7kimi. He says Nvidia's next-generation Ada Lovelace flagship will have 126 SMs. The number is lower than the projected 140 SMs. As with any leaks, use caution.

126 SMs account for a total of 16128 FP32 Shading cores. In comparison to the AD102 GPU's 144 SMs, this implies an RTX 4090 Ti model will follow. The RTX 4090 graphics card would get a 450W TDP and 24GB of 21Gbps GDDR6X memory. This may appear to be a rather power-hungry architecture, but the expected performance increase over the RTX 3090 is twofold. Although at a higher TDP, performance scaling should occur with TSMC's new 4nm node and new architecture design. The leaker also mentions a release date in July, which seems a little improbable. However, Gamescom is taking place in August and NVIDIA previously has already announced (not released) new generations of video cards at the event, such as the RTX 2080 and the entire lineup of Turing GPUs.

Take these so-called twitter outings with a grain of salt.

GeForce RTX 4090 twice as fast as RTX 3090 uses 450W (16128 Cores) Arrives in July?