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I did a test with Disk Speed Test.
Write speed is 85.5 MB/s

Yes, they are.
Your Kingston FCR-HS4 (as mine) does not know anything about overclocking and runs pure UHS-I protocols as specified by SD Card Association. Means: UHS-104 is the limit.
You can compare your numbers with https://www.cameramemoryspeed.com/reviews/sd-cards/sandisk-extreme-pro-170mbs-uhs-i-u3-v30-64gb-sdxc-memory-card/
In this test all cardreaders but one are running non-proprietary transfer modes. The only one using overclocking stands out.

Thanks Walter Schulz for the explanation 

I did a beanchmark of my SD card on my PC as you suggested. I used My Kingston FCR-HS4 card reader which is usb 3.0, connected directly to a usb 3.0 port on the motherboard.
I used the CrystalDiskMark program with the default settings and the aja system software. Unfortunately, I do not know any other softwares.
These are the results:

what do you think about these results, do you think they are in the normal range for my SD?

[240 MHz Preset]

I did a bench with the newest_sd_uhs_SDR104_patchmodule.
The 240 MHz preset now works on my SD as well 
Thanks!

This is the result:
240 MHz Preset
Sandisk Extreme Pro 170 MB/s U3 64GB

Write speed: 83.7 MB/s
Read speed:  85.7 MB/s
Write speed: 83.5 MB/s
Read speed:  85.7 MB/s

I bought the 64 GB version

First of all, thank you Bilal and everyone who contributed to make this new module free for everyone 
I did a bench with my new sd card: Sandisk Extreme Pro 170 MB/s U3.
Seems that it can handle the 192 MHz preset correctly, instead with the 240 MHz preset it drops to 20MB/s.
Before this update, the same SD only worked with the 168 MHz preset. So this seems like a huge improvement to me.
Later I will also try it with my old  Sandisk Extreme PRO UHS-I U3 95MB/s
Thanks again!

Sandisk Extreme Pro 170 MB/s U3: New sd_hs module.192MHz preset:

[artifacts are no longer visible]

Today I tested the new build:"crop_rec_4k.2022Jul04.100D101_ADTG".
In the same lighting conditions where I had artifacts before.

-Tested all 1x3 presets. 12 bit, 23.976 fps, 25 fps.
The artifacts are no longer visible 
I put the link with the test MLV files:
https://drive.google.com/drive/folders/19E3IRpgkBfjoIsFjB7MfDkf6fDS4xKcO?usp=sharing

Bilal you did it 
Thanks!

With this latest build the artifacts seem to be gone.
I will try tomorrow in other lighting conditions. But I think this is the right way.
Thanks Bilal and also to the others who helped me 
You guys are great 

just another little test I don't know if it can make sense.
maybe it's the summer heat playing tricks on me 

-UHD 1X3 preset, 12 bit, 23,976 fps.

400 ISO, artifacts are visible
https://drive.google.com/file/d/1P8o22RTubL9hY1vmsD2z7yQ7BGjsephS/view?usp=sharing

800 iso, artifacts are not visible
https://drive.google.com/file/d/16Q3pZ2neZvQb5dPC3Xa9_S-RVlQL9dCu/view?usp=sharing

Danne.
It happens every time and only when i enter the 1x3 crop mode in video mode.
if i activate the 1440p 1:1 preset there are no visible artifacts on the liveview or even in the video i recorded. maybe it is just a coincidence

Thanks Danne
I downloaded the build and repeated the tests.
I noticed that there are some new modules in this build.
I only loaded the ones I had already loaded in the previous builds.
Unfortunately the artifacts are still there in the 1x3 modes.
One thing I noticed but maybe it is not important. In all the builds I have tried.
When I activate the crop mode in the video mode. On the liveview of the camera I see the same artifacts that are in the recorded video.
While recording a raw video I see at the top of the live view the same colored, flashing bands that I see later in the video I recorded.
Currently the preview is set to realtime. if I try to change it to another option it resets itself when I exit the magic lantern menu.
i don't know if i explained myself correctly. my English sucks.

Guys your work is amazing 
I am very happy that the build works well on your cameras and for all the users who have this great camera 

-I tested UHD 1X3 and 4k 1x3 presets in 14 bit lossless. artifacts still appear 
-I tested the 3k and 1440p 1:1 presets. There are no visible artifacts. At least I can't see them. maybe the 1:1 mode don't give problems on my camera. 

Obviously to get a good recording time I had to reduce the bits to 10, use 23.976 fps and lower the resolution.
As usual I put some sample mlv files made with both presets at different resolutions and bit depht. take a look when you can.
Thanks

1440p 1:1 preset:
https://drive.google.com/drive/folders/1kgkTOUrFuPfsMWtJ3_cgCHkFS2CAspjh?usp=sharing

3k 1:1 preset:
https://drive.google.com/drive/folders/1_pfTlm_dCFb3NkO-dw6yzbkbsJ3USpaE?usp=sharing

Hi Danne
I installed your build.
I did some testing, at home for now.
But I need help to understand which presets I should use and how I should set them. Because the camera crashed a few times during recording and in the clips I made there are many corrupted frames.
I think it's my fault, I got used to bilial's build which had slightly different settings.
link with the various crash logs:
https://drive.google.com/drive/folders/1flNTGxPTwwTybtRWXZYDTQ5kQqRcHn1U?usp=sharing

However, I was able to record some clips.
With your build, in these lighting conditions there seems to be no artifacts on the top of the frame, but I think it is better to do some more tests in other lighting conditions as well, and set more appropriate settings to avoid the corrupted frames and crashes
Some MLVs test files:
https://drive.google.com/drive/folders/12Y-iMQ1-m7xHrJPqAFiZaQN4dLbHsJG9?usp=sharing

Thanks guys

Okay I did this:
- I switched to photo mode.
- I turned on expsim mode in the expo tab.
-I set the white balance to a personal value (5200k).
-restarted the camera
- I recorded some raw video in all 1x3 modes, both 24.973 fps and 25 fps
Unfortunately, artifacts are visible in all modes 
I put the link to mlvs file, this time 5 frames per clip.
https://drive.google.com/drive/folders/1IQ1bpWKOI9T0aRATwlj_1tfRJxkmpViS?usp=sharing

Regarding the possibility that our cameras have a slightly different sensor, perhaps that could be true, but I don't know much about it.
On the bottom of my camera is a little label that says: Made in TAIWAN, and the serial number.
I don't know if this might be relevant, maybe it doesn't make any difference but, I think it is a camera for the European market. i think this because some time ago, I sent the camera to a service center for auto focus calibration of the kit lens.
The repair was under warranty and the camera was sent by Canon to a lab in Germany.

Edit: I did some more tests at home with low artificial light, the artifacts are almost not visible 
I think this is going to drive me crazy
https://drive.google.com/drive/folders/1_acY0asl8sB-pPAq7ju74X2mASjPJP71?usp=sharing

@Danne
I did it but nothing changes. I also disabled everything in the overlay section. I also tried a fresh installation but the artifacts remain.
I leave a short clip with the operation I usually do to record raw video. to see if I missed something.

One more thing, I tried the 1920x1280p 1:1 preset it seems there are no artifacts with it.
https://drive.google.com/file/d/1YUVXB5CODWrKc8VtWEDrEE326ojRB6hn/view?usp=sharing


I personally think it would be helpful if some other users would also provide their feedback on this.

I am not using any particular setting.
Almost all settings are the default ones except these:
I only enabled the "focus peack" and " raw histogram" in the overlay section. In the RAW video section I activated the two options "small hack" and "more hacks lvface+aewb". Fps ovveride is not active.
In the canon menu I set the video format to PAL and the recording format to 1920x1080 25 fps.
I have tried disabling crop mode, putting the focus rectangle in the center in 1x mode and re-enabled crop mode but the problem remains.
I noticed that these artifacts are also visible in the preview on the live view, before I start recording and while I am recording.
These are the modules I have enabled:
crop_rec - dual_iso - mlv_lite - mlv_play - mlv_snd - sd_uhs.

This is the configuration file:
https://drive.google.com/file/d/1H-n_Q9_rn-ioQV_99a5FQO4MHXrV3TyP/view?usp=sharing

Thanks

I did some more tests with new build. I shot some raw video under the same lights conditions as last time.
Used only UHD 1X3 and 4k 1x3 presets in both 25fps and 23,973 fps.
Unfortunately, the results are the same as last time. On the top of the frame I have that strange effect. videos shot indoors have no problem.
I noticed a few videos with corrupted frames at the beginning.
I share the link to the folder where I uploaded all the mlvs files. Inside it you will find subfolders with the name of the used presets.
Take a look when you can
If you need more tests just ask 
https://drive.google.com/drive/folders/145oB6eJZbft6W7xLb768njG7Il9LAoUR?usp=sharing

No problem.
unfortunately i only got to try these two presets at 23.973 fps. Maybe later or tomorrow i will be able to try the other presets at 25 fps too and I will report the results 

Yes of course, sorry
Link to the same folder but with smaller files:
https://drive.google.com/drive/folders/1-COgSnAwgprsIif1iA1tzZ2iQcoonMWL?usp=sharing

I had the opportunity to try the build more thoroughly.
The speed of the SD seems constant. I can record for several minutes without problems.
One problem I noticed is that, in every RAW video I have recorded, on the top of the frame only, there is some kind of intermittent noise and strange vertical stripes.
This is most visible in outdoor footage, instead in the recordings made at home the problem is very little noticeable.
This happens in both mlvapp and davinci resolve using the uncompressed dng files extracted with mlvapp.
The problem is also visible by opening the mlvs files with the FastcinemaDNG program.
I upload some MLVS test files.
Note that. The mlvs files I have uploaded contain only a few frames extracted from the original mlvs files.
I exported them from mlvapp using the MLV flatpass method. this is because the original files are too big to upload directly to google drive.
if you need other files or other tests I can do it
Thanks for the help

https://drive.google.com/drive/folders/1-COgSnAwgprsIif1iA1tzZ2iQcoonMWL?usp=sharing

[-UHD 1X3 1280x2160]

ok I'm back 
I recorded two raw videos. duration one minute per video, because the battery was getting low.
It's really stable, I think it could keep shooting continuously.

These are the settings

-UHD 1X3 1280x2160
12 bit Lossless, 23.973 fps
Frames 1504, Duration 1 Min, But I think it's continuous

-4K 1x3: 1x3 Binning 1360x1976
12 bit Lossless, 23.973 fps
Frames 1493, Duration 1 Min, But I think it's continuous

Bilal you are great 

I installed the latest test build you provided. Something has changed. it looks better now

Write speed 67.3 MB/s
Read speed 71.9 MB/s

I used the sd_uhs from a1ex.  because i hadn't seen the first link with your build, sorry.

Ok done. this is the .LOG file
https://drive.google.com/file/d/1sP4CJKMZlBXwItMUhhkYXB1fLYEjs23E/view?usp=sharing