This question will be resolved as soon as a review is published by TechPowerUp. The performance comparison will be based on the average frame rate achieved by the standard variant of the GPU at 4K resolution. Currently, the RTX 4090 achieves an average of 109.2 FPS, as reported by https://www.techpowerup.com/review/intel-arc-b580/31.html :
If the RTX 4090 maintains its frame rate, the new flagship GPU would need to reach an average of at least 218.4 FPS to be considered "100%+ faster".
If TechPowerUp doesn't publish a review, I'll use some other source, like e.g. TomsHardware.
1,000
3.00It looks like the 5090 is going to have a bandwidth of 1,792 GB/s. Memory bandwidth is a good proxy for performance when all else is equal because GPU manufacturers usually try to ensure there is no single overspecced component. Large memory buses, in particular, are quite expensive and are normally avoided unless absolutely necessary. Since the 4090 has a memory bandwidth of about 1,000 GB/s, the performance gain should be around 80%.
However, it’s possible that the 5090 is becoming so fast that the CPU may start being a bottleneck, even at 4K resolution. It’s also possible that NVIDIA has improved the compression algorithms, allowing the 5090 to achieve significantly more than 80% effective memory bandwidth compared to the 4090.
Sources:
https://www.techpowerup.com/330230/nvidia-geforce-rtx-5090-powered-by-gb202-silicon-512-bit-gddr7-asic-pictured
https://www.techpowerup.com/gpu-specs/geforce-rtx-4090.c3889