Delkin 633X SD Memory Card Review

Delkin 633X SD Memory Card ReviewThe Delkin 633X U3 is an incredibly fast UHS-I SD memory card and gives even the top brands like Kingston and Sandisk a run for their money. The Delkin 633X is often in the top of the list with the in-camera memory card speed tests and Delkin is a very reliable and trusted brand. This makes the Delkin 633X a great buy for those looking for an alternative to the Sandisk Extreme Pro.


Delkin 633X U3 UHS-I Memory Card Sizes

The Delkin 633X is available in all sizes from 8GB to 512GBs and is easy to find on both BHPhoto and Amazon.

Memory Card Name16GB32GB64GB128GB256GB512GB
Delkin 633X Memory CardAmazonAmazonAmazonAmazonAmazonAmazon


Real World Memory Card Performance

Read and write speeds are fantastic with the Delkin 633X. The read speed on par with the best UHS-I memory cards out there and the write speeds just slightly lags behind the top cards from Sandisk and Kingston. I’m talking like 1 megabyte per second slower, an insignificant difference really.

In-camera performance usually lands the Delkin 633X at the top of the charts for a UHS-I cards.

All around it’s a great card from a brand you can trust.

Memory Card NameUSB 3.0 ReadUSB 3.0 Write
Delkin 633X SD Memory Card98.3 MB/S88.7 MB/S



Speed Class: Class 10 / U3

UHS-I devices



Limited Lifetime Warranty