Asus Maximus XIII Hero + two videocards - not detect NVME SSD in legacy mode

Discussion on Asus forum: I have Asus ROG Maximus XIII Hero BIOS 1701 i7-11700k Two videocards Nvidia GTX 980Ti in SLI NVME SSD Samsung 980pro When installing two video cards, the NVME SSD is no longer detected. I checked sockets M.2_1 M.2_2 and M.2_3. SSD is not detected in any of them and the system does not boot. In the BIOS section AdvancedNVMe controller and Drive information No NVME Device Found At the same time, in the section AdvancedSystem Agent (SA) ConfigurationPCI Express Configuration I can see that the SSD is connected M.2_1x4 PCIEX16_1x8 PCIEX16_2x8 I began to understand and found out that when switching Launch CSM - Disabled, SSD appears in the AdvancedNVMe controller and Drive information section. when switching Launch CSM Enabled SSD is not detected. If I leave only one video card, then the SSD is determined My SSD has an MBR structure, is divided into several partitions and has several OS installed, so I cannot disable CSM Can I somehow configure it so that two video cards and an NVME SSD work with Launch CSM Enabled? P.S. I used Asus ROG Maximus XI Hero WiFi and i7-9700k before - everything worked I upgraded on Maximus XIII Hero and i7-11700k and it stopped working