I suspect that Crowz unit is a 2GB RAM unit so this may not apply, but for those watching this thread with 1GB Android head units the following learnings that I made may be helpful:
Over the last few days I have optimized the pathetic performance of my Eonon GA6166 1GB RAM operating system that I installed in my E53 in January/February 2017.
It took three full nights of researching threads in this forum
https://forum.xda-developers.com
and here
https://forum.xda-developers.com/and...o-px5-t3581741
But now I have a 56 second cold boot up (according to Startup Manager app) of the "modded" GA6166 and full functionality access to my apps. The bass response is enhanced so much so that I had to back off on my low frequency and sub volume settings. My rear camera stability appears to be improved as well.
Essentially, I installed a ROM from developer Hal9k_
https://drive.google.com/file/d/0B1S...pfLWNwUU0/view
Reloaded all my apps and then set the framework to "microG" which is a faster operating framework alternative to the Google Apps platform (apparently the Google Apps "platform" slows down the OS)
https://microg.org
The microG framework allows me to interface with the Google Play Store and apps platform for full download and update functionality of Google Play Store Apps.
It was a difficult and tedious 3-day journey but this sure salvages the pathetic performance I was getting from the 1GB RAM Eonon GA6166.
During my multi-day research I learned of a board mod for the GA6166 that will take it to a 4GB RAM and 32GB of storage available from:
https://www.aliexpress.com/item/WITS...814725689.html
I contacted Eonon for help before embarking on this research and mod journey but their assistance only offered another poor performing factory ROM and they were not able to offer me an upgrade board. Of course they would like me to buy a later model unit and quite possibly have to do the excruciatingly difficult task of running the FAKRA cable to the rear of the vehicle again (NO WAY was I up for that again!).
Possibly some folks out there are aware of this modding capability for the Android head units that are popular for our E53s, but I sure wasn't. So, for those that have a 1GB RAM unit and are experiencing painful slow cold boot performance, this may help lead you in the direction of some solutions.
Good luck reading the >55 page threads on the XDA forums to get yourself up to speed on these head unit mods.
PS: I fully understand that this voids any expectation of warranty from Eonon.
Mike