Can't run > 3 GPUS on MSI Z270 Krait Gaming

[Dylleram]

Got 4x1080, 3 on risers and 1 in pci-e x16 slot. If i run just 3(2 on risers and 1 in pcie) then it's working fine, but if i try to run 4 gpus at the same time, device manager says:
"This device cannot find enough free resources that it can use. (Code 12)

If you want to use this device, you will need to disable one of the other devices on this system."
for 3 gpus that are plugged into risers.

- i7 7700k, 32GB, SSD,

- MSI z270 Krait Gaming motherboard

- 2xAsus Strix 1080 A8G, 2x Gigabyte 1080 WindForce 3X Xtreme Gaming

- 3x risers 006.

- win 10-64bit

-PSUs: Corsair AX860i[i'm getting the same error when i try to run 4 gpus just on this psu] , Corsair RM750x

[Nokia555]

Got 4x1080, 3 on risers and 1 in pci-e x16 slot. If i run just 3(2 on risers and 1 in pcie) then it's working fine, but if i try to run 4 gpus at the same time, device manager says:
"This device cannot find enough free resources that it can use. (Code 12)

If you want to use this device, you will need to disable one of the other devices on this system."
for 3 gpus that are plugged into risers.

- i7 7700k, 32GB, SSD,

- MSI z270 Krait Gaming motherboard

- 2xAsus Strix 1080 A8G, 2x Gigabyte 1080 WindForce 3X Xtreme Gaming

- 3x risers 006.

- win 10-64bit

-PSUs: Corsair AX860i[i'm getting the same error when i try to run 4 gpus just on this psu] , Corsair RM750x

Have you checked bios and enabled 4G Decoding for it?

[U253]

get latest bios

enable 4G decoding/cryptocurrency mining option

get on card one by one then

[vatusasid]

get latest bios

enable 4G decoding/cryptocurrency mining option

get on card one by one then

I tried that and it is working for me.

[Dylleram]

get latest bios

enable 4G decoding/cryptocurrency mining option

get on card one by one then

got it working in some different way, ty

[CryptoOne]

what's the different way ?