I've tried enabling/disabling in all possible combinations:

USB Legacy support
USB 2.0 support
USB emulation type (Auto/HDD)
Hyperthreading support
No-Execute Memory Protect
Onboard SATA controller (Auto/Enhanced/Disabled)
ACPI
Onboard video 8MB/1MB

Also With and without an Adaptec 2820SA and Intel 1000/MT


Also, using a basic PCI VGA card instead of the onboard didn't change anything.