# M0125 vs M0151

Source: https://forum.modalai.com/topic/3009/m0125-vs-m0151
Category: General Questions (https://forum.modalai.com/category/2/general-questions)
Posted: 2024-01-11 17:49:25 UTC by bendraper
Replies: 2 · Views: 628

## bendraper · 2024-01-11 17:49:25 UTC

What are the differences between M0125 and M0151? I can't find any references to M0151 in the forums or technical docs.

## Reply by Vinny (ModalAI staff) · 2024-01-12 05:04:51 UTC

Hi @bendraper 
M0151 is identical to M0125 in all ways except one...
we added series USB caps on the SS lines on both TX and RX.
This was due to the fact we normally include them on the Modem Board (M0090) and we realized that not everyone uses the Modem board, so we needed to make sure some other solution had them in there as well.
If you were experiencing USB3 connection issues with M0125, M0151 should fix that issue.

So now our only "gap" on including the series USB caps on SS lines is on VOXL 2 Mini as noted here: 
https://docs.modalai.com/voxl2-mini-connectors/#j3-usb-3-10-pin
We do hope to spin that board in the next couple quarters, but no set time frame yet. Thankfully, most robotics use cases are more than satisfied with USB2.

## Reply by Vinny (ModalAI staff) · 2024-01-12 05:14:00 UTC (in reply to Vinny)

I want to add that M0125 is no longer being manufactured and we use M0151 as a direct substitute going forward. I'll try to have our product folks clarify the website for that.