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Results are within 10 percent range. 10 percent in bandwidth translates to less than 5 percent difference in horizontal resolution

This was a bit unclear with my so-so English. I felt I can miss some nuances which are obvious for you and not for me. Thank you for sending me back to this message (and for "nothing to write home about", a new idiom for me). I'll risk to grab a couple of Samsung pro plus 256, as an addition to my Sandisk128 Extreme Pro.

Oops, didn't notice the hidden part of the discussion there. But now I see, and I'm annoyed:

Works at 160MHz with EOS M and writes at 67 MByte/s. 192 MHz is dropping to 20 MByte and 240 MHz (if it loads at all), too.

So 67 MByte/s is maximum this card can suggest? (sorry for stupid questions, maybe new builds have fixed and boosted speed or so)

ATM (and for a while) my price/performance favorite is Samsung EVO Plus 256 GB.

Walter, could you tell me please is it (a bit) slower then Sandisk Extreme pro 200mb? Or the same? I have two 128Gb Sandisk, and want to buy more before vacation (laptop will not be on hand during daytime, and 12bit 5,2k eats space very fast). I'm a fresh user of eos m, so I test it these days, and 14 bit is unstable sometimes with my settings. Is it possible to record about 20 seconds on maximal quality (in a bright day or shiny docks at night) with Samsung Evo plus/Pro plus? Samsung prices are much reasonable.

UPD: I've found two years old warning on reddit:
>> DON'T BUY Samsung EVO Plus 130mb/s
>> If you want to record Raw Video, don't buy the Samsung EVO Plus 130mb/s.
>> You can not overclock at the moment and will get a max of 38mbit/s on the EOS M.
>> Rather buy a Kingston 95mb/s or Sandisk extreme pro 170/95mb/s

Is it obsolete?..

Good tip! Does zebra work correctly enough to avoid it? Or there are some nuances? I was going to be as lighter as possible up to the first red spots, but now I see it can be challenging for the camera.

You cannot get 153.4 MByte/s data transfer rate for continuous recording. Cam maxes out at around 83 MByte/s.

Oh, so I need to check settings about bitrate, right? Something is "doubled" that Mbytes... Any ideas?.. I nerdly did all step by step (that crop mood walkthrough), and there are not so many settings to make a mistake.

EDIT: Ups... I've changed 14 bit to 14 lossless, and it works somehow... One try was long, about ten seconds, second one was about several seconds and was shut by camera. Anyway, thank you for advice, I could search it for days by myself 

Benchmark should show write numbers well above 90 MByte/s.

Not above unfortunately. Feels like my card is not fast enough, right?

I can record continuously with crop mood off, in RAW 1736*n (4:3 looks preferable because it can be cut to cinematic 16:9 in post). But I still hope to reach a full potential of the camera.

EDIT:
SD overlock 240MHz (H):
Write speed: 84.2 Mb/s
Read speed: 86.2 Mb/s

SD overlock 192MHz, 160MHz, OFF:
Write speed: 78.3 Mb/s
Read speed: 86.2 Mb/s

What are your actual recording durations?

Less than a second. Just several frames.

I've also tried to set AccessMode to "SDR50" in SD Overclock submenu like it was recommended here: https://www.magiclantern.fm/forum/index.php?topic=26832.0 - and it didn't work for me.

I'll check your links, thank you! It is the first time in a decade when I've found youtube can't help me in a second. Like in old good days.

EDIT: Roger! Hope for good results because I've bought two equal cards during Amazon sales 

Dear ML enthusiasts, yesterday I started to deal with ML settings on my EOS M and ran into a typical (?) noob problem: "Expect around 0 frames at 6xMB/s". I took all settings from a 1 month fresh video and set the maximum quality settings (1:3, 14 bit, 5.2k). My card had to support this mode (Sandisk Extreme Pro 200mb/s 128Gb v3 class 10). Could you please tell me in which settings I could mistake? Maybe I need to try other versions of ML? Now It's the latest Crop Mood (2023Aug19.EOSM202). I tried to reduce the video quality in different ways, but it gave me about 50 frames only. I will be glad for your tips.

https://www.youtube.com/watch?v=C_Dx4RPpwEk&ab_channel=ReelFilmmaking

Thanks for the detailed answer! I assumed something like that. Well, I'll try to do my best with cinestyle profile for now. And RAW timelapses.

(Dear admin, I have no idea what is "source code", so thanks to another one guy on reddit, who was also angry for such a captcha. I mean "heptapod". I hope it is the most tricky one here, I'd like not to google answers each time I need to send a post.)

New blood here, guys
I knew about Magic Lantern just yesterday (what a pain to know it after 10 years of using 600d with soviet glasses). I'm waiting while my old good 600d come to me from another country, so I can only seek for info now. I was upset to know RAW files with max quality are about 3,5 seconds. But I keep hope there is a feature to make these shorts nonstop for easy combining in one nice footage later. Does this kind of feature exist? Or I need to push rec button each time after3-7 seconds video is ended?