So, quick backstory, i recently bought a Komputerbay 1066x 64GB
testing on MAC i got 149mbs read max, and 122mbs write max
Blackmagic on MAC 133 read max, and 121mbs write max
Testing today from a Windows Surface 3 CrystalDisk -- 149mbs read, 129mbs write
i was thinking of returning this card as it is still not quite 155 / 160 or consistently 140 write and my Magic Lantern benchmarks were poor
:64.8mb/s in movie mode, 54mbs read
74mb/s in photo and playback write
best results 86

today i installed the new july build and did a few restarts and in playback i got a massive result across the board:

But movie mode was still lacking...

I understand the limitations of the Canon 7D but want to maximise my speeds and have seen results nearing the 90mbs write
currently i am hitting around 78/79 maybe 81mb/s but it skips a frame and freezes up trying to write the data, sometimes its able to stop after a skipped frame write the 5/10 seconds and move on but others it will freeze the entire system.
So
1. should i return the card - the chipset is the old AB so could get an AC and i am still only getting 120mb/s write?
2. is this freezing normal what can i do to prevent it?
Thanks everyone great work so far very impressed.