# Usb boot and 1gb micro sd

**URL:** https://dietpi.com/forum/t/usb-boot-and-1gb-micro-sd/1686
**Category:** General Discussion
**Created:** [29 November 2017 08:46 UTC](https://dietpi.com/forum/t/usb-boot-and-1gb-micro-sd/1686 "2017-11-29T08:46:10Z")
**Posts on this page:** 1
**Showing post:** 4

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### Author: ![Fourdee](https://dietpi.com/forum/user_avatar/dietpi.com/fourdee/32/11_2.png) [@Fourdee](https://dietpi.com/forum/u/Fourdee)
#### Post date: [11 December 2017 05:43 UTC](https://dietpi.com/forum/t/usb-boot-and-1gb-micro-sd/1686/4 "2017-12-11T05:43:53Z")

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Hi,

Please see:

> [@RPi | Double SDcard IO (Read/Write speeds)](https://dietpi.com/forum/t/rpi-double-sdcard-io-read-write-speeds/279/1):
>
> I love Raspberry Pi’s and I have been using them for years. Its also the very 1st DietPi image I created. One of my major gripes with the RPi, is the limited performance of the SDcard IO (read and write) speed: This is a known limitation with all Raspberry Pi’s and only 17.5mb/s read and write can be achieved. Whereas, other SBC’s (eg: Odroid C1/2) can offer SDcard IO performance at 40+mb/s You can double the read and write performance to 35mb/s on all Raspberry Pi’s: Ho…

> 32gb evo + can theoretically gain 20 MB/s write and 95 MB/s read speeds

Samsung rate the write speed as “Upto” on EVO. Not guaranteed.

> And with read and write speeds of up to 80 MB/s and 20 MB/s respectively,  
> [https://www.amazon.co.uk/Samsung-Memory-MicroSDHC-UHS-I-Adapter/dp/B00WIMC5C4/ref=sr\_1\_4?s=computers&ie=UTF8&qid=1512971282&sr=1-4&keywords=samsung+evo+plus+micro+sd](https://www.amazon.co.uk/Samsung-Memory-MicroSDHC-UHS-I-Adapter/dp/B00WIMC5C4/ref=sr_1_4?s=computers&ie=UTF8&qid=1512971282&sr=1-4&keywords=samsung+evo+plus+micro+sd)

I personally use Sandisk Extreme UHS-3 range, with higher write speeds. With SD overclock (link above), 26-37.5MB/s write.

> Up to 60/40 MB/s read/write speeds for faster recording and transfer  
> [https://www.amazon.co.uk/SanDisk-Extreme-microSDHC-Memory-Class/dp/B00M55BS8G](https://www.amazon.co.uk/SanDisk-Extreme-microSDHC-Memory-Class/dp/B00M55BS8G)

Rule of thumb, Upto does not mean you’ll achieve it, so purchase an SD card with a higher write speed than you need to avoid disappointment.

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