So after some reading it appears that the machine has run out of IRQ's. The fact that it shows up under SATA controller could just be that SATA was the next in line for an interrupt and none were available.
Something tells me your NIC's are eating up the IRQ's. This symptom seems to hit with many IRQ interfaces on a machine:
I do notice that vgapci0 using irq 16 on bus pci7 seems to be grabbing the interrupt before ahci0 SATA controller on pci0 using irq16
I still think its the same symptom. Network interfaces are using all the irq's.
Maybe quirky ACPI bios. Have you looked for newest firmware?
I know these OEM'ers don't offer much for public download support.
Can you try and disable the NIC's in the bios? I see igb8 up there. How many interfaces does it have?