# What is the difference between BB-GGR-C-1 and BB-GGR-C-2?

**URL:** <https://forum.botblox.org/t/what-is-the-difference-between-bb-ggr-c-1-and-bb-ggr-c-2/241>\
**Category:** BotBlox Hardware\
**Tags:** gigablox-rugged\
**Created:** [June 13, 2024, 5:00am UTC](https://forum.botblox.org/t/what-is-the-difference-between-bb-ggr-c-1-and-bb-ggr-c-2/241 "2024-06-13T05:00:30Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![botblox\_admin](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.botblox.org/botblox_admin/32/1_2.png) [@botblox\_admin](https://forum.botblox.org/u/botblox_admin)\
**Post date:** [June 13, 2024, 5:00am UTC](https://forum.botblox.org/t/what-is-the-difference-between-bb-ggr-c-1-and-bb-ggr-c-2/241/1 "2024-06-13T05:00:30Z")

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_– Copied from customer email –_

We see that the revision has changed to BB-GGR-C-2. What are the technical differences between those two revisions? Has anything in the size/shape or interface changed?

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<div class="post-metadata">

**Author:** ![josh\_elijah](https://yyz1.discourse-cdn.com/flex027/user_avatar/forum.botblox.org/josh_elijah/32/568_2.png) [@josh\_elijah](https://forum.botblox.org/u/josh_elijah)\
**Post date:** [June 13, 2024, 5:01am UTC](https://forum.botblox.org/t/what-is-the-difference-between-bb-ggr-c-1-and-bb-ggr-c-2/241/2 "2024-06-13T05:01:03Z")

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Please see below the changes between BB-GGR-C-1 and BB-GGR-C-2.

1. Change U3 part number from TPS54260QDRCTQ1 to TPS54260QDGQRQ1
2. Change footprint from VSON10 to HVSSOP10
3. Populate R82- 0 ohm to set NCV6324 PFM mode as default

These changes were done due to a shortage of one of the power regulator chips on the board. It has no effect on the functionality, performance, dimensions or interfaces. We will never make a drastic change to any board in our [BotBlox Supply Guarantee Program](https://botblox.io/botblox-supply-guarantee-program/), which includes GigaBlox Rugged.