Still can't boot Ventura on USB-2 key, need UEFI configuration? T5810

[greens]

Help! 

For several weeks I still can't get Ventura to start, yet I have three identical machines and it doesn't work. 
I even tried different versions of the Bios...
Note : and I have 3 identical computers T5810 that have the same problem.  

I have done dozens of tries with 2 USB keys :

No problem to copy paste the UEFI and the bios mount the USB-2 key,
No problem to launch Clover or OpenCore, but once you choose Ventura, there is always the same error.
There is therefore a parameter that must be changed or that does not work, which prevents me from starting the macOS Ventura installer.
I did :
1. I put the Bios on UEFI instead of Legacy.
1. I used Ventura Olarial (download from the forum) to make the USB key in disk image with Balena Hetcher.
2. I took the UEFI which I decompressed then copy/pasted into the volume of the UEFI partition of the USB key
CLOVER.X99.zip or EFI.Opencore.Desktop.HEDT.Haswell-E.zip (for x99)
I did it with Clover which allows settings and OpenCore and the result is unfortunately the same, when I start on the USB key:

Quote

Mac OS version: Not yet set
....
system model name: iMacPro1.1
....
** In Memory Panic Stackshot Success ** Bytes Traced 21401 (Uncompressed 93,072) **
MACH Reboot

and nothing more...

Why can't I create a viable and functional startup key?
Which parameter is missing? I forgot some things??? 
Link from this computer : https://qrl.dell.com/#/product/overview/7/59
Hardware : DELL Precision T5810 workstation with Xeon processor, GPU: NVIDIA Quadro
 

This is the continuation of the topic https://www.olarila.com/topic/31797-which-efi-for-the-ssd-of-a-dell-t5810/#comment-182937

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