# Does DevTerm support UHS-1 Micro SD Cards?
**URL:** https://forum.clockworkpi.com/t/does-devterm-support-uhs-1-micro-sd-cards/8375
**Category:** DevTerm
**Created:** [April 29, 2022, 1:43am UTC](https://forum.clockworkpi.com/t/does-devterm-support-uhs-1-micro-sd-cards/8375 "2022-04-29T01:43:14Z")
**Posts on this page:** 7
**Page:** 1
### Author:  [@supercom32](https://forum.clockworkpi.com/u/supercom32)
#### Post date: [April 29, 2022, 1:43am UTC](https://forum.clockworkpi.com/t/does-devterm-support-uhs-1-micro-sd-cards/8375/1 "2022-04-29T01:43:14Z")
Hi Everyone,
Does the DevTerm support UHS-1 Micro SD Card speeds? Or does it only go as fast as class 10 allows?
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### Author:  [@supercom32](https://forum.clockworkpi.com/u/supercom32)
#### Post date: [April 29, 2022, 3:27pm UTC](https://forum.clockworkpi.com/t/does-devterm-support-uhs-1-micro-sd-cards/8375/2 "2022-04-29T15:27:19Z")
Hrm… Since UHS-2 uses a new pin layout, I’m guess that looking at the SD card port for what pins it has would be an easy way to rule out UHS-2 use. I guess UHS-1 is still possible though!
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### Author:  [@Jory\_Griffis](https://forum.clockworkpi.com/u/Jory_Griffis)
#### Post date: [April 29, 2022, 5:41pm UTC](https://forum.clockworkpi.com/t/does-devterm-support-uhs-1-micro-sd-cards/8375/3 "2022-04-29T17:41:29Z")
I use a Sandisk Extreme Pro SDXC card in mine ([this one](https://www.amazon.com/SanDisk-Extreme-UHS-I-128GB-Adapter/dp/B07G3H5RBT/) on amazon!) which I believe is UHS-1.
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### Author:  [@supercom32](https://forum.clockworkpi.com/u/supercom32)
#### Post date: [April 29, 2022, 5:54pm UTC](https://forum.clockworkpi.com/t/does-devterm-support-uhs-1-micro-sd-cards/8375/4 "2022-04-29T17:54:47Z")
How fast is your transfer speeds with the DevTerm? Noticeably better than 10MB/s? I’m thinking about maybe getting a new SD card if it helps with boot/load times.
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### Author:  [@Jory\_Griffis](https://forum.clockworkpi.com/u/Jory_Griffis)
#### Post date: [April 29, 2022, 6:09pm UTC](https://forum.clockworkpi.com/t/does-devterm-support-uhs-1-micro-sd-cards/8375/5 "2022-04-29T18:09:47Z")
With the card I mentioned hdparm is reporting around 22.75 MB/s. I can’t tell how much that materially improves boot/load times, but anecdotally it does feel a little better.
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### Author:  [@supercom32](https://forum.clockworkpi.com/u/supercom32)
#### Post date: [April 29, 2022, 6:17pm UTC](https://forum.clockworkpi.com/t/does-devterm-support-uhs-1-micro-sd-cards/8375/6 "2022-04-29T18:17:43Z")
Hrm… I get roughly the same amount of speed with a regular class 10 card when I do the same test as yours. I guess maybe there isn’t much of a speed difference (at least with the DevTerm) to switching.
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### Author:  [@Jory\_Griffis](https://forum.clockworkpi.com/u/Jory_Griffis)
#### Post date: [April 29, 2022, 6:31pm UTC](https://forum.clockworkpi.com/t/does-devterm-support-uhs-1-micro-sd-cards/8375/7 "2022-04-29T18:31:46Z")
Dang! Just a placebo effect, then!