# EMMC experiments

**URL:** <https://forum.clockworkpi.com/t/emmc-experiments/13365>\
**Category:** uConsole\
**Tags:** hardware\
**Created:** [May 17, 2024, 4:51pm UTC](https://forum.clockworkpi.com/t/emmc-experiments/13365 "2024-05-17T16:51:09Z")\
**Posts on this page:** 1\
**Showing post:** 11

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**Author:** ![Kirou](https://yyz1.discourse-cdn.com/flex029/user_avatar/forum.clockworkpi.com/kirou/32/8936_2.png) [@Kirou](https://forum.clockworkpi.com/u/Kirou)\
**Post date:** [May 29, 2024, 6:51am UTC](https://forum.clockworkpi.com/t/emmc-experiments/13365/11 "2024-05-29T06:51:50Z")

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Hi all!  
The stuff has arrived. I’m currently testing 3 configurations :

- cm4 with embedded emmc,
- cm4 with the Orange pi emmc + sd adapter,
- cm4 with a class 10 V30 A2 micro sd.

Of course, I will give measurement results, but the first tests indicate that the on-board memory is the fastest.  
The slowest is the sd and the emmc is somewhere between the two, more on the side of the integrated emmc.

I have an unexpected problem with the microsd flat extension cord. It works perfectly with an sd card, but not with the emmc + adapter. I suppose this is due to a small electrical resistance that the emmc cannot tolerate.  
If someone has a suggestion, I’m interested!

The sequel to the next episode 😁

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