Host is: Ubuntu Server 9.10 64-bit, 3 x 2.7 GHz AMD Athlon X3 425, 2 x 1 GB DDR2 667 MHz, single channel, 4 x 250 GB SATA Samsung 7200 drives: approx.
Used Windows2008 settings for guest installation. Windows 2012 Standard 180-days Evaluation Tested 1GB, 8GB and 16GB RAM on guest using virtio drivers. Host machine has a Intel(R) Core(TM) i5-2400 CPU 3.10GHz and 8GB RAM.
Virtio drivers are installed in the guest os. Guest Support Status Note: Qemu/kvm will likely run most production operating systems, but this page is maintained nonetheless for general information purposes.