Gigabyte Z390 UD Only 3 GPU accepted

[lasikMetal]

So I’m using a Gigayte mobo and can’t get more than 3 gpu’s. The bios settings are CSM disable, 4G enable, IOAPC 24-119 Entries - Disabled, PCIE Gen 1.
I try with UEFI but it get’s errors and finally just 3 or 2 gpu work. I’m mining RVN with 3070 ti, I have a friend who’s using the same mobo but mining eth with 3080s and does not have my problem.
Any advice?

[easy2supply]

i want to buy that mobo as well, hoping anyone have an answer too

[lasikMetal]

So I contact Gigabyte and they said thia board is not for mining so is normal I doesn’t detect more than 3 gpus. I’m changing mobo so don’t recommend buying this one.

[qualizon]

Is your friend who mines ETH still using the same mb as of now? how many gpu can his board detect?

Upon further research, I notice this board has 3 revisions, 1.0, 1.1 and 2.0 , can you find out what rev is yours and your friend’s ?

Thanks.

[Xan27]

I have a similar Board, the Gigabyte Z390 D. 6x AMD W5700 working on it with these settings:

CSM Support: Disabled
VT-d: Disabled
SATA-Controller & OnBoardSound: Disabled (i use a USB-Stick for HiveOS)
PCIe Support: 8/4/4
Above 4G Decoding: Enabled
IOAPIC 24-119 Entries: Disabled (becomes visible if u enable 4G Decoding)
LinkSpeed: Gen1
InitDisplayFirst: IGFX
InternalGraphics: Enabled

[Tlarim3187]

I have this exact board and have 7 gpu’s total running.
4 rx570, 2 rx470, 1 3060ti

MB gigabyte z390ud rev 1.1, cpu pentium g5400t, 8GB ram, dual sea sonic 650w psu’s.

Pretty close to same settings as Xan27.

[lasikMetal]

I finally solved the problem using a pcie splitter, I have 5 gpu now working

[Stefano]

Hey man, can you send me your bios settings please? What did you change? I can’t connect more than 2 GPUs… thanks