| 21 May 2025 |
 matthewcroughan - nix.zone | no guarantee they're broadcom ones though right? | 14:54:49 |
 emily | I mean, you just look up the modules. | 14:55:06 |
| emily | I don't think any of the Broadcom ones I found on Amazon clearly did autoneg right | 14:55:17 |
| matthewcroughan - nix.zone | how do you know they're broadcom, do you disassemble them and look at the chip/ | 14:56:54 |
| matthewcroughan - nix.zone | * how do you know they're broadcom, do you disassemble them and look at the chip? | 14:56:56 |
| emily | well sometimes it says in the listing, sometimes you google the model number – but in this case all the 80m and 100m ones that do 10G are the Broadcom chip | 14:58:50 |
| emily | since it's the only option out there | 14:58:56 |
| emily | you still need to research the modules to see how they are with autoneg though | 14:59:13 |
| emily | there's a bunch of posts online | 14:59:16 |
| emily | e.g. https://forums.servethehome.com/index.php?threads/10gb-sfp-rj45-100m.45817/ | 15:00:01 |
| matthewcroughan - nix.zone | I can get 10 of those transceivers for 329 quid | 15:00:03 |
| emily | https://www.reddit.com/r/mikrotik/comments/1bq5b27/testing_10gtek_10gbaset_copper_sfps/ | 15:00:17 |
| matthewcroughan - nix.zone |
The 10GBase-T module is built with the latest IC: Marvell AQR113C. Please note the 10GBase-T SFP+ module can get hot when it's working, because the IC power consumption is 2.5W. We suggest to use this product in places where the ambient temperature is below 50°C.
| 15:00:28 |
| matthewcroughan - nix.zone | not these then | 15:00:36 |
| emily | again, if it's a Marvell chip it won't be rated for 80m–100m | 15:01:17 |
| matthewcroughan - nix.zone | Hard to tell, amazon is telling porky pies | 15:01:27 |
| emily | you can just ignore the 30m ones if heat is a major concern | 15:01:28 |
| matthewcroughan - nix.zone | ah no, you can only buy the 80m ones in bundles of 2, otherwise they downgrade you | 15:01:45 |
| matthewcroughan - nix.zone | two transceivers cost 90 quid | 15:01:59 |
| matthewcroughan - nix.zone | ;_; | 15:02:02 |
| matthewcroughan - nix.zone | https://www.amazon.co.uk/10Gtek-10GBase-T-Transceiver-Compatible-Supermicro/dp/B0BRQ5MDHY | 15:02:12 |
| matthewcroughan - nix.zone | nonetheless, I think it's still a good setup | 15:02:39 |
| matthewcroughan - nix.zone | 68C for the ASF-10G2-T isn't bad though | 15:03:42 |
| matthewcroughan - nix.zone | ah okay that's the right answer then, that reddit thread is gold! | 15:04:43 |
| matthewcroughan - nix.zone | ASF-10G2-T runs at lower temps and autoneg works, whereas the broadcom ones don't work with autoneg | 15:05:00 |
| matthewcroughan - nix.zone | The firmware on the broadcom chip is out of spec, so autoneg doesn't work, but forcing a specific speed does | 15:10:09 |
| emily | "the broadcom ones don't work with autoneg" is not true | 15:12:57 |
| emily | it's the people doing the SFP modules that fuck it up somehow | 15:13:11 |
| emily | the datasheet clearly lays out that it supports everything | 15:13:17 |
| emily | it's just a matter of getting an SFP module that gets it right. I know the FiberMall ones apparently do but they're pricey | 15:13:33 |
