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GPS-Chip / Accuracy

Dennis.stevens1982 over 4 years ago

Hey there,

Does anyone know which GPS-Chip is used in FR745? Is it a Sony or a MediaTek?

And if it is Sony: Is it the same as on FR245M?

Kind regards!

Dennis

Top Replies

-Petr- over 4 years ago +1

Does any one has some copare with accuracy F6s pro to FR 745? Some one say that F6 is less accurate due to metal and FR745 has best accuracy ever. If you have some track record on the same condition, it…

All Replies

0 ZK148P15 over 4 years ago

Sony is used. Different version against 945 and the others.

0 tess over 4 years ago in reply to ZK148P15

Garmin switch to Sony awhile back. Where did you find info that it's a different version from the 945 and other watches? Are you referring to software or hardware?

0 ZK148P15 over 4 years ago in reply to tess

Tess Igot info from developer.

Confirmed different chipset. For 745 was getting info for Sony CXD5605.

Technical background is visble there :
https://the5krunner.com/2020/09/17/more-accurate-sony-gnss-gps-chip-for-sports-wearables/amp/?__twitter_impression=true

Sony GPS specs :
https://www.sony-semicon.co.jp/e/products/lsi/gps/product.html

You can see probably future chipset for new Garmin Sportester.

0 Dennis.stevens1982 over 4 years ago in reply to ZK148P15

ZK148P15 said:
Different version against 945 and the others

OK, thank you very much. Hopefully it works as good for me as the one in FR245.

0 tess over 4 years ago in reply to ZK148P15

That's interesting. I wonder how much of a difference the newer chipset works in the 745 compared to the 945. Hopefully, someone with both can do some testing.

0 Pavel over 4 years ago in reply to ZK148P15

if you check comments, you can see that author corrected himself - FR 745 does not use new chipset. it is most likely same as FR 245, FR 945 and rest of the latest generation of watches.

0 -Petr- over 4 years ago

Does any one has some copare with accuracy F6s pro to FR 745? Some one say that F6 is less accurate due to metal and FR745 has best accuracy ever. If you have some track record on the same condition, it will be helpfull. Thank you.

0 Dennis.stevens1982 over 4 years ago in reply to -Petr-

Did my first training today with FR745. FR745 is as unaccurate as Fenix 6X Pro and FR945. On a distance of 6,1km the FR745 measured a distance of 5,88km which is a deviation of 210 meters. Pace-date was horrible (while FR245 monitored steady pace of 6:00min/km FR745 was unsure whether it was a 6:44 oder a 6:27). Last lap was the worst: While FR245 measured a pace of exact 6:00min/km, FR745 said it was 05:06,8 - which is not possible since I ran a really casual training.

Will return the FR745. Not worth the money.

0 Pavel over 4 years ago in reply to Dennis.stevens1982

Did you wear both watches on same hand?

745 might be broken since it should give you same or better readings as 245

0 Dennis.stevens1982 over 4 years ago in reply to Pavel

Of course I did not wear both watches on the same wrist.
The FR745 is not broken. This is the exact same behaviour as I have experienced on three (no joke!) Fenix 6X Pro and a FR945.