June 16, 2026
Too Hot to LAN-dle
10Gb/s Ethernet: switching to a Broadcom SFP+ module
Home internet drama ends with a cooler swap as commenters demand bigger, weirder upgrades
TLDR: A home internet setup kept cutting out because a plug-in network adapter was overheating, so the owner replaced it with a newer, more efficient model. In the comments, readers turned the fix into a mini-drama about fake device identities, whether fiber would have been smarter, and of course, demands for even faster speeds.
A home networking upgrade turned into a tiny metal diva meltdown when one plug-in adapter got so hot it basically rage-quit the internet. The old part was reportedly hitting about 93–95°C — hot enough to shut itself off, cool down, then come back just to overheat again. The fix? Swap the old module for a newer Broadcom-based one that uses less power and, hopefully, less chaos. The nerve-racking part wasn’t just the heat; it was also physically removing the stubborn old module, with a YouTube tutorial entering the chat like an emergency pit crew.
But the real fun is in the comments, where the community immediately did what the community does best: turn one practical fix into five side quests and a hardware identity crisis. One commenter cut straight to the eternal tech-user mood with, “Recommendations for 25Gbit next please!” Translation: congrats on solving your problem, now make it faster. Another wandered in with wholesome rom-com energy, thrilled they were already shopping for the exact same model. And then the plot got deliciously weird: commenters started talking about modules that “lie about themselves,” including a gadget that can apparently reprogram them to pretend they’re made by someone else. Yes, even networking gear has catfishing drama.
The hottest divide came from the classic practical-versus-purist fight. One side said, basically, why not skip this whole heat-soaked copper mess and use fiber instead? The other side stayed focused on the real-world problem: the walls were already wired, the gear had to work, and nobody wants to run air conditioning 24/7 just to keep the internet alive. Meanwhile, another commenter escalated from home networking pain to asking for cool-running fiber internet sticks, proving that in tech threads, someone is always having an even more specific crisis.
Key Points
- •The author’s home LAN used 10GBASE-T SFP+ modules because the existing in-wall cabling was CAT-6 or similar while the router and switch exposed 10Gb/s via SFP+ cages.
- •A MikroTik S+RJ10 module in the study switch reached about 93C and eventually began thermal shutdown cycling at roughly 95C, causing repeated link flapping and loss of Internet access.
- •Based on prior discussion and forum references, the author determined that older Marvell-based 10GBASE-T SFP+ modules tend to run hotter than newer Broadcom-based versions.
- •The overheating module was replaced with a 10Gtek ASF-10G-T80-INT, whose published specifications state it uses a Broadcom BCM84891 PHY and supports up to 80 meters over CAT.6a or CAT.7.
- •After installation, network connectivity returned, but the previous SNMP-based monitoring no longer showed temperature data, likely because the replacement module reported telemetry differently or on a different OID.