AMD Radeon RX 6900 XT - ROCm vs Vulkan - Gemma 4 and Qwen 3.5 speed benchmarks
Did some quick tests after building llama.cpp with ROCm 6.4.2 and latest Vulkan for my 6900 XT gemma4 E2B Q4_K ubatch ROCm pp512 Vulkan pp512 ROCm tg128 Vulkan tg128 32 1536.60 1423.49 151.92 174.59 64 1590.65 193
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