Ok, that fixed it.
write 35mb / read 39 Best
Not much luck on higher speeds. Any idea why?
5D3 fw123 "4K raw video recording; lossless compression" version of ML
CrystalDiskMark bench for reference:
Seq Read: 81.47MB/s Write 77.89MB/s
===================
2018/04/05 12:15:25
===================
Before the hack: r:20MB/s w:20MB/s W:20MB/s R:21MB/s

[best 20MB/s]
SDR50 @ 96MHz : r:35MB/s w:34MB/s W:35MB/s R:38MB/s

[best 34MB/s]
SDR50 @ 96MHz : r:35MB/s w:35MB/s W:35MB/s R:38MB/s

[best 35MB/s]
SDR50 @ 80MHz : r:31MB/s w:30MB/s W:30MB/s R:33MB/s meh [best 35MB/s]
SDR50 @ 80MHz : r:30MB/s w:30MB/s W:30MB/s R:33MB/s meh [best 35MB/s]
SDR50 @ 120MHz : r:err [SAFE] [BACK]
SDR50 @ 120MHz : r:err [SAFE] [BACK]
SDR104 @ 96MHz : D0 D0 r:35MB/s w:34MB/s W:35MB/s R:38MB/s

[best 35MB/s]
SDR104 @ 96MHz : D1 D1 r:34MB/s w:34MB/s W:35MB/s R:39MB/s

[best 35MB/s]
SDR104 @ 80MHz : D0 D0 r:30MB/s w:30MB/s W:30MB/s R:33MB/s meh [best 35MB/s]
SDR104 @ 80MHz : D1 D1 r:30MB/s w:30MB/s W:30MB/s R:33MB/s meh [best 35MB/s]
SDR104 @ 120MHz: D0 D0 r:err [SAFE] D0 [BACK] D0
SDR104 @ 120MHz: D1 D1 r:err [SAFE] D0 [BACK] D1
SDR104 @ 132MHz: D0 D0 r:err [SAFE] D0 [BACK] D0
SDR104 @ 132MHz: D1 D1 r:err [SAFE] D0 [BACK] D1
SDR104 @ 160MHz: D0 D0 r:err [SAFE] D0 [BACK] D0
SDR104 @ 160MHz: D1 D1 r:err [SAFE] D0 [BACK] D1
SDR104 @ 160MHz: D2 D2 r:err [SAFE] D0 [BACK] D2
SDR104 @ 160MHz: D3 D3 r:err [SAFE] D0 [BACK] D3
SDR104 @ 160MHz: D0 D0 r:err [SAFE] D0 [BACK] D0
SDR104 @ 160MHz: D1 D1 r:err [SAFE] D0 [BACK] D1
SDR104 @ 160MHz: D2 D2 r:err [SAFE] D0 [BACK] D2
SDR104 @ 160MHz: D3 D3 r:err [SAFE] D0 [BACK] D3
SDR104 @ 160MHz: D0 D0 r:err [SAFE] D0 [BACK] D0
SDR104 @ 160MHz: D1 D1 r:err [SAFE] D0 [BACK] D1
SDR104 @ 160MHz: D2 D2 r:err [SAFE] D0 [BACK] D2
SDR104 @ 160MHz: D3 D3 r:err [SAFE] D0 [BACK] D3
SDR104 @ 160MHz: D0 D0 r:err [SAFE] D0 [BACK] D0
SDR104 @ 160MHz: D1 D1 r:err [SAFE] D0 [BACK] D1
SDR104 @ 160MHz: D2 D2 r:err [SAFE] D0 [BACK] D2
SDR104 @ 160MHz: D3 D3 r:err [SAFE] D0 [BACK] D3
Best: D0 D0 r:35MB/s w:34MB/s W:34MB/s R:38MB/s

[best 35MB/s]
Best: D0 D0 r:35MB/s w:34MB/s W:35MB/s R:39MB/s

[best 35MB/s]
-----------------------------------------------------------------------
CrystalDiskMark 5.1.0 x64
-----------------------------------------------------------------------
* MB/s = 1,000,000 bytes/s [SATA/600 = 600,000,000 bytes/s]
* KB = 1000 bytes, KiB = 1024 bytes
Sequential Read (Q= 32,T= 1) : 81.474 MB/s
Sequential Write (Q= 32,T= 1) : 77.886 MB/s
