<![CDATA[Post fan/GPU upgrade, and some additional fan RPM tuning via IPMI: VM server is running a lot cooler, for the most part.]]>Post fan/GPU upgrade, and some additional fan RPM tuning via IPMI: VM server is running a lot cooler, for the most part. CPU VRM temperatures during a big compile job are less than the *idle* temps previously.

But I'm now seeing NIC temperature and it's concerningly hot. I'm not sure why it wasn't showing up before so I have no idea how toasty it was.

I'm also seeing what appears to be poor / unstable network performance.

The ConnectX6 is passively air cooled and sits just to the right of the new 80mm fans (as seen from the rear panel), and I suspect what is happening is that the negative pressure from the new fans is drawing front-to-back airflow slightly to the left and reducing airflow over its heatsink. Thermal engineering is hard.

I have another PCIe slot exhaust fan on order coming tomorrow so hopefully things are tolerable between now and then.

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]]>https://board.circlewithadot.net/topic/e068d2e0-1062-46f9-b03a-1b1481176f58/post-fan-gpu-upgrade-and-some-additional-fan-rpm-tuning-via-ipmi-vm-server-is-running-a-lot-cooler-for-the-most-part.RSS for NodeFri, 15 May 2026 05:19:43 GMTThu, 14 May 2026 13:28:03 GMT60<![CDATA[Reply to Post fan/GPU upgrade, and some additional fan RPM tuning via IPMI: VM server is running a lot cooler, for the most part. on Thu, 14 May 2026 16:21:04 GMT]]>We can also see the bad network performance in the CPU usage charts, showing up as increased dom0 iowait time due to CephFS operations lagging

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]]>https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116573841975689880https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116573841975689880Thu, 14 May 2026 16:21:04 GMT<![CDATA[Reply to Post fan/GPU upgrade, and some additional fan RPM tuning via IPMI: VM server is running a lot cooler, for the most part. on Thu, 14 May 2026 16:19:04 GMT]]>The SSD is slightly cooler, other than a short spike right after boot that might be before the fans spun up fully or something

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]]>https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116573834064936603https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116573834064936603Thu, 14 May 2026 16:19:04 GMT<![CDATA[Reply to Post fan/GPU upgrade, and some additional fan RPM tuning via IPMI: VM server is running a lot cooler, for the most part. on Thu, 14 May 2026 16:17:15 GMT]]>Historical network traffic before and after the recent reconfiguration.

I wonder why all my virtual desktops are so slow?

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]]>https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116573826965981349https://board.circlewithadot.net/post/https://ioc.exchange/users/azonenberg/statuses/116573826965981349Thu, 14 May 2026 16:17:15 GMT<![CDATA[Reply to Post fan/GPU upgrade, and some additional fan RPM tuning via IPMI: VM server is running a lot cooler, for the most part. on Thu, 14 May 2026 13:57:41 GMT]]>@azonenberg I recently upgraded the firmware on twelve ConnectX-6 Dx cards, took something like 5 minutes per card (including one reboot), that 5 minutes was enough to make the heatsink too hot to touch. This was on a box with decent airflow too

]]>https://board.circlewithadot.net/post/https://mastodon.online/users/karppinen/statuses/116573278171020043https://board.circlewithadot.net/post/https://mastodon.online/users/karppinen/statuses/116573278171020043Thu, 14 May 2026 13:57:41 GMT