CPU.
It is not limited to Linux guests but allows arbitrary operating systems
to run.
+
+How long will my {pve} version be supported?::
+
+{pve} versions are supported at least as long as the corresponding
+Debian Version is
+https://wiki.debian.org/DebianOldStable[oldstable]. {pve} uses a
+rolling release model and using the latest stable version is always
+recommended.
++
+[width="100%",cols="5*d",options="header"]
+|===========================================================
+| {pve} Version | Debian Version | First Release | Debian EOL | Proxmox EOL
+| {pve} 4.x | Debian 8 (Jessie) | 2015-10 | 2018-05 | tba
+| {pve} 3.x | Debian 7 (Wheezy) | 2013-05 | 2016-04 | 2017-02
+| {pve} 2.x | Debian 6 (Squeeze)| 2012-04 | 2014-05 | 2014-05
+| {pve} 1.x | Debian 5 (Lenny) | 2008-10 | 2012-03 | 2013-01
+|===========================================================