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Bookmark or Share- Speed Class - SD AssociationThe UHS Speed Classes defined by the SD Association are UHS Speed Class 1 (U1) and UHS Speed Class 3 (U3). U1 and U3 can be applied to UHS Bus IF product family (UHS-I & UHS-II &UHS-III). The Video Speed Classes defined by the SD Association are V6, 10,30,60 and 90.
- SD Card Speeds and What They Mean (2024): UHS-1, V60, Class 10 - WIREDUHS-I cards have a theoretical maximum of 104 MB/s, while UHS-II cards top out at 312 MB/s. These aren’t necessarily their actual speeds, just what the connector is capable of.
- UHS-I Vs UHS-II: Speed Differences Explained - sony camera centralUHS-I cards, while more affordable, provide maximum transfer rates up to 104 MB/s, which might suffice for general photography. However, if you're into high-speed shooting or 4K video, you'll want the superior speed of UHS-II cards, which can reach up to 312 MB/s.
- Bus Speed (Default Speed/High Speed/UHS/SD Express)SD Association introduced faster speed bus interfaces: UHS-I, UHS-II, UHS-III and SD Express. All of these faster interfaces are available for SDHC, SDXC and SDUC memory cards. UHS-I provides faster bus speed using just one row of pins.
- UHS I vs UHS II vs UHS III: The REAL Differences - Lapse of the ShutterCompare UHS I vs UHS II vs UHS III bus types in this article aimed at those looking for a new SD card. Learn which bus type is best for your card, and how this impacts the other speed classes for SD cards.
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