SDHC Lexar 600x with the promise that it at least 90MB / s read achieved
Benchmark results from CrystalDiskMark 3.0.2 x64
Read MB / s | Write MB / s
Seq: 78.65 | 66.2
512K: 75.23 | 24.6
4K: 7,519 | 0.687
4K QD32 8,114 | 0.695
-------------------------------------------------- ----
Maybe my onboard card reader only 08-15 & is thus the bottleneck, but I would therefore advise all rather equal to the 400x version. Then there one probably is not a bottleneck.