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microSD Express Cards
Choose this 512GB P9 Express for a compatible Express host when you also want UHS-I fallback for an older device; the advertised 800MB/s read rate applies to Express mode, while Samsung rates UHS-I reads at 90MB/s.1
The three-year warranty excludes dashcams, CCTV, surveillance cameras and other write-intensive uses, so choose a card with suitable cover for those workloads.1
The details
| Capacity | 512 GB1 |
|---|---|
| Rated sequential read speed | 800 MB/s (Host interface: 800MB/s is the SD Express rating; the maker separately specifies UHS-I sequential read90MB/s.; Test method: Internal testing with the P9 Express512GB card on a PCIe test board; actual performance varies with host, interface and usage.)1 |
| Rated sequential write speed | 200 MB/s (Test method: Reviewer-stated rating for the256GB/512GB P9 line, not a measured512GB result; this review tested the256GB card. Samsung’s WW maker page does not publish a sequential-write rating.)2 |
| Warranty | Three years (Workload: Warranty excludes dashcam, CCTV, surveillance camera and other write-intensive uses.)1 |
| Brand | Samsung3 |
| Works in older slots | Yes (Host interface: UHS-I fallback has a separately specified90MB/s sequential-read rate; Express rated speed requires an Express host.)1 |
|---|---|
| SD specification | SD 7.11 |
Measured sequential write speed, Measured sequential read speed, Officially licensed, Sizes offered, PCIe interface.
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