5th GPU causing weird errors, not showing up on hiveos

Motherboard
P67A-GD65 (MS-7681) MSI (V4.3 01/09/2013)
CPU
4 × Intel® Core™ i3-2120 CPU @ 3.30GHz
Disk Model
ATA Samsung SSD 840 120GB

Latest Bios, latest Hive-Os all running on trex miner

So I am running 2x 1660 Super and 2x 3060 ti with no problems-

When I shut down, plug in the 5th GPU a nother 1660 super and restart, it still shows 4 GPUs 2x 1660 super an 2x 3060ti.

But actually one of the 1660 s gets replaced by the new one (which I can assume by different RAM type)

But I got that new card running, although it does not show powerconsumption- but it hashes and runs… so I guess it really can’t be about the riser. (although I switched multiple times)

I tried updating in hive os from 4 to 5 gpu, bu that id not change anything after a restart

Do I have to do anything at boot to “apply” the 5th card propperly?

My mobo has the newest 4.3 bios and no settings for 4G decoding, already checked that

All useless stuff like Audio is turned of-

On my other GPUS they simply shoewd up after a reboot so I was wondering whats going wrong…