7900 XTX + 32/64GB RAM for Qwen 3.8 Flash Next?

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Planning to build a PC mainly for local LLMs/coding agents. I keep seeing 3090 + Qwen 3.8 Flash Next benchmarks, but could not find enough info for the 7900 XTX 24GB . 3090s are hard to find where I live, while newer Nvidia GPUs are too expensive, so I am considering a 7900 XTX as the GPU choice. Anyone running Qwen 3.8 Flash Next on a 7900 XTX? What tok/s are you getting in decode and prefill, and how is AMD/ROCm support? Also, if SSD streaming/offloading is needed anyway to run Q4, is 32GB sys