Asus P8B WS mobo won't boot with all PCI x16 slots used

[philjayj]

Hi

I've installed 4 PCI-E network cards in to each of the x16 PCI-E slots on my P8B WS motherboard.

When all four slots are filled, the board will not boot and I get a flashing cursor just after POST.

If I remove a card and free up a slot, the PC boots with no problems.

I am using this machine as a pfSense router, so there is no Windows OS installed.

Any help would be appreciated.

Phil

 

[philjayj]

Hi

I've tried both of them and still get the same thing.

Cheers

 

[philjayj]

Yep, tried that too. I've also pressed F8 during boot to choose what to boot from and I still get it.

I've done some Googling and I've come across "IRQ error" a few times. What do you think?

Thanks