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MI50 GPU Performance: PCIe vs. PEX8749 Switch Card

A user on Reddit's r/LocalLLaMA subreddit shared performance benchmarks comparing two configurations of MI50 GPUs. The first setup utilized six MI50s directly connected via PCIe, while the second used a PEX8749 card to manage four MI50s, freeing up PCIe slots for two additional cards. Across various tests, the PEX8749 configuration showed a slight decrease in 'pp' speeds (less than 1%) but a marginal increase in 'tg' speeds (up to 2.8%). Overall, the performance difference between the two setups was minimal, with most tests showing less than a 1% variation. AI

IMPACT Provides insights into hardware configuration trade-offs for local LLM inference, potentially guiding users on optimizing GPU setups.

RANK_REASON User-generated benchmark comparing hardware configurations for AI inference.

Read on r/LocalLLaMA →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

MI50 GPU Performance: PCIe vs. PEX8749 Switch Card

COVERAGE [1]

  1. r/LocalLLaMA TIER_1 English(EN) · /u/Old_Grapefruit8774 ·

    6x MI50's on PCIE vs 4x MI50's on PEX8749 and 2x on PCIE

    <!-- SC_OFF --><div class="md"><p>I am really excited to share this one. On the X99-E-WS motherboard.. while old and PCIE 3.0 - I think it's still pretty capable for what I'm trying to do (1TB VRAM across 3 machines). The board has seven physical PCIe x16 slots shared through the…