Sd Card Reader Connector And Card Reading Speed Considerations
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It is worth noting that the push wire terminal block specification needs to match the SD card version. U cards require additional pin support. If an old card holder that is only compatible with U-I is used, the speed will be limited to 104MB/s. Similarly, the SD adapter card holder has an additional contact link due to push in terminal block wire connector, and usually loses about 5-10% of the speed compared to the native SD card holder push in wire terminal block. In extreme cases, poor quality push fit terminal block connector may even become the bottleneck of the entire transmission link, making it impossible for high-end SD cards to break through the read and write speed of 50MB/s due to push connector block.
