AMD ROCm stack improved 75x in 14 days post-DeepSeek v4 via fused operations. Still needs 5x more to match B200 performance. AMD's ROCm software stack improved performance by over 75x in 14 days since DeepSeek v4's launch, according to @SemiAnalysis_. The gains come from fused mHC and RoPE operations that reduce CPU overhead and improve HBM memory utilization. Key facts ROCm performance improved 75x in 14 days post-DeepSeek v4 Fused mHC and RoPE operations cut CPU overhead Kernels rewritten in TileLang and Triton for speed 5x more needed to match B200 single-node performance 1.5x more needed for PD disaggregated B200 performance The 75x improvement is not a single benchmark but an aggregate across key inference kernels. The performance comes from fusing mHC operations and fusing RoPE hadamard transformations to reduce CPU overhead and improve HBM memory utilization [per @SemiAnalysis_].…