Transcend TS64GSDU1 Class 10 UHS-I SDXC 64GB Premium Memory Card (300x) [Amazon Frustration-Free Packaging] (Personal Computers)
My 64GB 300x model creates with Xbench on current MacBook Pro after all, up to 42MB / s uncached write (4K blocks) and an Xbench score of at least 45.92. In the overall performance and is thus, for example, significantly higher than the 64GB SDXC 600