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.
| Model | Released | API | Product | Chipset | APPro? | References |
|---|---|---|---|---|---|---|
| Forerunner 165 Music | 2024-02 | 5.0.0 | 4433 | AG3335MN ? | Y | Garmin manual + the5krunner |
| Forerunner 165 | 2024-02 | 5.0.0 | 4432 | AG3335MN ? | Y | Garmin manual + the5krunner |
| Forerunner 965 | 2023-03 | 5.0.0 | 4315 | AG3335M | Y | Garmin manual + TechInsights |
| Forerunner 265 | 2023-03 | 5.0.0 | 4257 | AG3335M | Y | Garmin manual |
| Forerunner 265S | 2023-03 | 5.0.0 | 4258 | AG3335M | Y | Garmin manual |
| Forerunner 955 | 2022-06 | 5.0.0 | 4024 | AG3335M | Y | Garmin manual + reddit |
| Forerunner 255 Music | 2022-06 | 5.0.0 | 3990 | AG3335M | Y | Garmin manual + DCR review |
| Forerunner 255 | 2022-06 | 5.0.0 | 3992 | AG3335M | Y | Garmin manual + DCR review |
| Forerunner 255S Music | 2022-06 | 5.0.0 | 3991 | AG3335M | Y | Garmin manual + DCR review |
| Forerunner 255S | 2022-06 | 5.0.0 | 3993 | 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.
| Model | Released | API | Product | Chipset | APPro? | References |
|---|---|---|---|---|---|---|
| Forerunner 55 | 2021-06 | 3.4.0 | 3869, 4033 | CXD56xxxx | Y | Garmin manual + forum |
| Forerunner 945 LTE | 2021-06 | 4.2.0 | 3652, 3978 | CXD56xxxx | Y | |
| Forerunner 745 | 2020-09 | 3.3.0 | 3589, 3794 | CXD56xxxx | Y | |
| Forerunner 45 Plus | 2020-08 | 1.4.0 | 3469 | CXD56xxxx | - | |
| Forerunner 45 / 45S | 2019-04 | 1.4.0 | 3282, 3847, 3469 | CXD5603GF | - | |
| Forerunner 245 Music | 2019-04 | 3.3.0 | 3077, 3321, 3913 | CXD5603GF | Y | iFixit teardown |
| Forerunner 245 | 2019-04 | 3.3.0 | 3076, 3145, 3914 | CXD5603GF | Y | |
| Forerunner 945 | 2019-04 | 3.3.0 | 3113, 3441 | CXD5603GF | Y |
Alternative product number(s) include APAC models.
Additional notes about the Sony chipsets are available on another page.
| Model | Released | API | Product | Chipset | APPro? | References |
|---|---|---|---|---|---|---|
| Forerunner 645 Music | 2018-01 | 3.2.0 | 2888, 3004 | MT3333 | Y | |
| Forerunner 645 | 2018-01 | 3.1.0 | 2886, 3003 | MT3333 | Y | |
| Forerunner 30 | 2017-09 | - | 2891, 2977 | MT3333 | - | |
| Forerunner 935 | 2017-03 | 3.1.0 | 2691, 2833 | MT3333 | Y | |
| Forerunner 35 | 2016-08 | - | 2503, 2650, 2667, 2668, 2727, 2814 | MT3333 | - | |
| Forerunner 735XT | 2016-05 | 2.4.0 | 2158, 2533, 2534 | MT3333 | - | iFixit teardown |
| Forerunner 630 | 2015-10 | 1.4.0 | 2156, 2310, 2311 | MT3333 | - | Tech T teardown |
| Forerunner 235 | 2015-10 | 1.4.0 | 2431, 2396, 2397, 2653, 2733 | MT3333 | - | |
| Forerunner 230 | 2015-10 | 1.4.0 | 2157, 2313 | MT3333 | - | Embedded teardown |
| Forerunner 25 | 2015-08 | - | 2148 | MT3333 ? | - | |
| Forerunner 225 | 2015-05 | - | 2153, 2219 | MT3333 | - | |
| Forerunner 920XT | 2014-10 | 1.4.0 | 1765, 2130, 2131, 2132 | MT3333 | - | |
| Forerunner 15 | 2014-05 | - | 1903, 2061 | MT3333 ? | - | |
| Forerunner 620 | 2013-09 | - | 1623, 1928, 1929, 2072, 2173 | MT3333 | - | |
| Forerunner 220 | 2013-09 | - | 1632, 1930, 1931, 2073, 2174 | MT3333 | - | EE World teardown |
| Forerunner 10 | 2012-08 | - | 1482, 1688 | MT333x | - |
Alternative product number(s) include APAC models.
The MT333x in watches prior to 2013 was likely to be the MT3339 or MT3337.
Additional notes about the Mediatek chipsets are available on another page.
| 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 | - | DCR review | |
| 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 | - | Garmin manual | |
| Forerunner 205 | 2006-01 | - | SiRFstarIII | - | Garmin manual | |
| Forerunner 301 | 2005-01 | - | SiRFstarII | - | ||
| Forerunner 201 | 2003-08 | - | SiRFstarII | - | ||
| Forerunner 101 | 2003-03 | - | SiRFstarII | - |