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+--- Thread: PCIe lane weirdness with inference loads for Mixtral (/showthread.php?tid=1103)
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PCIe lane weirdness with inference loads for Mixtral - embersmith - 10-12-2026
This keeps coming up in conversation so I figured I'd start a thread.
It feels like the conversation has shifted hard toward inference and serving details lately, and honestly that makes sense once you start dealing with tokens/sec.
Maybe obvious to some of you, but it clicked for me this week.
For context, I'm not chasing leaderboard numbers. I mostly want the system to feel consistent day to day.
Re: PCIe lane weirdness with inference loads for Mixtral - signaltrack44 - 10-14-2026
Good point. That matches what I saw on 5090. I got better results once I stopped chasing one metric and just looked at whether the workflow felt usable.
Re: PCIe lane weirdness with inference loads for Mixtral - cudapoint - 10-14-2026
Thanks, that helps. The pattern around VRAM headroom has been pretty similar for me. I got better results once I stopped chasing one metric and just looked at whether the workflow felt usable.
Re: PCIe lane weirdness with inference loads for Mixtral - griffinloom66 - 10-15-2026
I'd approach it in a boring order. On GB200, the easiest win is often to back off the aggressive settings and see whether the problem survives. Not glamorous advice, but repeatable baselines save a lot of time.
Re: PCIe lane weirdness with inference loads for Mixtral - turbogrid11 - 10-15-2026
My first guess would be this: If you're on Ollama, I'd confirm the version first and then reduce variables until the behavior is obvious.
Re: PCIe lane weirdness with inference loads for Mixtral - turboarch95 - 10-15-2026
A couple questions before I guess too hard. Is this local-only or are you routing anything externally?
Re: PCIe lane weirdness with inference loads for Mixtral - rocmriley - 10-16-2026
I hit almost the same issue last night.
Re: PCIe lane weirdness with inference loads for Mixtral - batchwire - 10-16-2026
My first guess would be this: Before rebuilding anything, I'd test one clean baseline with Phi and compare from there.
Re: PCIe lane weirdness with inference loads for Mixtral - amberhall - 10-16-2026
What worked for me was pretty simple. Start by verifying the driver/runtime combo, then test with a smaller prompt, then look at structured output. Not glamorous advice, but repeatable baselines save a lot of time.
Re: PCIe lane weirdness with inference loads for Mixtral - sanevault - 10-16-2026
Quote:What worked for me was pretty simple. Start by verifying the driver/runtime combo, then test with a smaller prompt, then look at structured output. No
I hit almost the same issue last night.