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Moving 2× RX 7900 XTX (+2× MI50) from a 2013 Xeon board to EPYC to finally get PCIe P2P for tensor parallel — can anyone confirm this config before I buy?

This story is from 2026-09-04. It is preserved in the archive; the latest stories are on the live feed.

**TL;DR:** my two 7900 XTX can't do P2P on my current Intel C602 board, so tensor split in llama.cpp barely helps. I believe the fix is a Zen CPU (Linux P2PDMA whitelist), and I'm about to buy an ASRock Rack ROMED8-2T + EPYC 7302P + 8× DDR4 RDIMM. Looking for people who actually run 2× 7900 XTX wit…

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  1. 2026-09-04 20:20 · r/LocalLLM
    Moving 2× RX 7900 XTX (+2× MI50) from a 2013 Xeon board to EPYC to finally get PCIe P2P for tensor parallel — can anyone confirm this config before I buy?

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