L1 and L2 cache specs for Nvidia's new RTX 5090 and RTX 5080 have cropped up. HardwareLuxx reports that the RTX 5090 and 5080 have the same L1 cache capacity per SM as the 4090 and 4080, and the 5090 has 36% more L2 cache compared to its predecessor.
L1 cache capacity per SM reportedly remains the same on GB202 as is on AD102, featuring 128 kB of capacity per SM. As a result, the RTX 5090 features 21.7 MB of L1 cache capacity in total, giving the Blackwell GPU 5.4MB more L1 cache over the RTX 4090, thanks to its improved SM count of 170 compared to 128 on the RTX 4090 (21,760 CUDA cores vs 16,384).
