How to check/test internal card reader speed

I obtained new SD card asserted to be 10 class of rate, yet inner Disk energy in linux after examination turned up just 6th class of rate. Just how can I examine my card viewers rate to ensure that it is not the restriction of the tool, yet the restriction of a card?

I do not have actually any kind of accepted SD cards to execute examinations with them.

My card viewers reveals similar to this in lspci:

0000:07:00.0 FireWire (IEEE 1394): Ricoh Co Ltd R5C832 IEEE 1394 Controller (rev 05)
0000:07:00.1 SD Host controller: Ricoh Co Ltd R5C822 SD/SDIO/MMC/MS/MSPro Host Adapter (rev 22)
0000:07:00.2 System peripheral: Ricoh Co Ltd R5C592 Memory Stick Bus Host Adapter (rev 12)
0000:07:00.3 System peripheral: Ricoh Co Ltd xD-Picture Card Controller (rev 12)
2022-06-07 15:16:47
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