"Does Xen VGA graphics passthru work with computers with AMD CPUs/motherboards?
Currently AMD chipset IOMMU support is very limited. AMD chipsets having an IOMMU currently are the SR5690/SR5670 server chipsets. AMD Server chipset SR5690 / SR5670 have been tested successfully with Xen and VGA passthrough (Tyan S8212 motherboard). If you know more AMD chipsets with IOMMU, or you have tested some chipset/motherboard, please send an email to xen-devel with details about the chipset/motherboard and we'll update this wiki page. "
Peccato..per sfruttare appieno Xen ci vuole almeno per il momento una
scheda madre Intel e un processore Intel.