gps-details

Garmin Forerunner

Overview

This page lists the GNSS chipsets that are used in the Garmin Forerunner watches.

The various models are listed in reverse-chronological order. The release dates are generally from Wikipedia.

Airoha

Model Released API Product Chipset APPro? References
Forerunner 165 Music 2024-02 5.0.x 4433 AG3335MN ? Y Garmin manual + the5krunner
Forerunner 165 2024-02 5.0.x 4432 AG3335MN ? Y Garmin manual + the5krunner
Forerunner 965 2023-03 5.0.x 4315 AG3335M Y Garmin manual + TechInsights
Forerunner 265S 2023-03 5.0.x 4258 AG3335M Y Garmin manual
Forerunner 265 2023-03 5.0.x 4257 AG3335M Y Garmin manual
Forerunner 955 [Solar] 2022-06 5.0.x 4024 AG3335M Y Garmin manual + reddit
Forerunner 255S 2022-06 5.0.x 3993 AG3335M Y Garmin manual + DCR review
Forerunner 255 2022-06 5.0.x 3992 AG3335M Y Garmin manual + DCR review
Forerunner 255S Music 2022-06 5.0.x 3991 AG3335M Y Garmin manual + DCR review
Forerunner 255 Music 2022-06 5.0.x 3990 AG3335M Y Garmin manual + DCR review

? - single band so could be AG3335MN or AG3352.

Additional notes about the Airoha chipsets are available on another page.

Sony

Model Released API Product Chipset APPro? References
Forerunner 55 (Asia) 2021-06 3.4.x 4033 CXD56xxxx Y Garmin forum
Forerunner 945 LTE (Asia) 2021-06 4.2.x 3978 CXD56xxxx Y  
Forerunner 55 2021-06 3.4.x 3869 CXD56xxxx Y Garmin manual
Forerunner 745 (Asia) 2020-09 3.3.x 3794 CXD56xxxx Y  
Forerunner 945 LTE 2021-06 4.2.x 3652 CXD56xxxx Y  
Forerunner 745 2020-09 3.3.x 3589 CXD56xxxx Y  
Forerunner 45 Plus 2020-08 1.4.x 3469 CXD56xxxx -  
Forerunner 45 / 45S 2019-04 1.4.x 3469 CXD5603GF -  
Forerunner 945 (Asia) 2019-04 3.3.x 3441 CXD5603GF Y  
Forerunner 245 Music 2019-04 3.3.x 3321 CXD5603GF Y iFixit teardown
Forerunner 245 2019-04 3.3.x 3145 CXD5603GF Y  
Forerunner 945 2019-04 3.3.x 3113 CXD5603GF Y  

Additional notes about the Sony chipsets are available on another page.

Mediatek

Model Released API Product Chipset APPro? References
Forerunner 645 Music 2018-01 3.2.x   MT3333 Y  
Forerunner 645 2018-01 3.1.x   MT3333 Y  
Forerunner 30 2017-09 -   MT3333 -  
Forerunner 935 2017-03 3.1.x   MT3333 Y  
Forerunner 35 2016-08 -   MT3333 -  
Forerunner 735XT 2016-05 2.4.x   MT3333 - iFixit teardown
Forerunner 630 2015-10 1.4.x   MT3333 - Tech T teardown
Forerunner 235 2015-10 1.4.x   MT3333 - fellrnr.com
Forerunner 230 2015-10 1.4.x   MT3333 - Embedded teardown
Forerunner 25 2015-08 -   MT333x -  
Forerunner 225 2015-05 -   MT333x - fellrnr.com
Forerunner 920XT 2014-10 1.4.x   MT3333 -  
Forerunner 15 2014-05 -   MT333x -  
Forerunner 620 2013-09 -   MT333x - fellrnr.com
Forerunner 220 2013-09 -   MT3333 - EE World teardown
Forerunner 10 2012-08 -   MT333x - fellrnr.com

Additional notes about the Mediatek chipsets are available on another page.

SiRF

Model Released API Product Chipset APPro? References
Forerunner 910XT 2011-10 -   SiRFstarIV - DCR review
Forerunner 70 2011-10 -   SiRFstarIV -  
Forerunner 610 2011-04 -   SiRFstarIV - DCR review
Forerunner 410 2010-10 -   SiRFstarIV -  
Forerunner 210 2010-10 -   SiRFstarIV -  
Forerunner 110 2010-03 -   SiRFstarIV -  
Forerunner 405CX 2009-04 -   SiRFstarIII ? -  
Forerunner 310XT 2009-04 -   SiRFstarIII ? -  
Forerunner 60 2009-01 -   SiRFstarIII ? -  
Forerunner 405 2008-01 -   SiRFstarIII -  
Forerunner 50 2007-08 -   SiRFstarIII -  
Forerunner 305 2006-01 -   SiRFstarIII - Wikipedia
Forerunner 205 2006-01 -   SiRFstarIII - Wikipedia
Forerunner 301 2005-01 -   SiRFstarII -  
Forerunner 201 2003-08 -   SiRFstarII -  
Forerunner 101 2003-03 -   SiRFstarII -