Hi

I' ve built a new 4 GPU rig and have a weird problem with it....

Hardware:

Mainboard= Asrock Z490 (I had a CPU for it lying around)
CPU= i5 10400
Ram= 2x4GB
PSU= 750W Corsair
GPU's= 4x Nvidia 1660 Super (2 onboard, 2 with riser)

Now my problem is that i've got hashrates around 27Mhs on 2 cards (one in #1 pci-e 16x onboard, one with riser) and only 20Mhs on the other 2 cards (one in #2 pci-e 16x onboard, one with riser).

Things i made/tried to solve the problem:

BIOS update
installed new nvidia driver, using DDU
installed new chipset driver
enabled/disabled above 4k decoding in the BIOS
tried different miners (Phoenix and t-rex)

Nothing changed... Any idea here in the forum?!?

Cheers Hi-Fish

PS: Temps are ok