AMD MI455X Early Tests Reveal 23.3TB/s HBM4 Bandwidth

Early tests of AMD's MI455X show it features 432GB of HBM4 with a peak bandwidth of 23.3TB/s. However, its pin speed of 7.5 Gbps lags behind Nvidia's reported 10.7 Gbps.

2026-07-24 ~ 2026-07-24 · 2 related posts

• AMD’s HBM4 data rate trails Nvidia’s 10.7 Gbps per pin claim — zephyr_z9 · 2026-07-24
• AMD's MI455X reportedly delivers 432GB of HBM4 and 23.3TB/s bandwidth — art_zucker · 2026-07-24