NG="3" BORDER="0">

	VMware	Connectix/ Virtual Server	Swsoft Virtuozzo
Host OS	GSX Server: Windows NT, 2000, 2000 Advanced, .Net servers; Red Hat Linux, Mandrake Linux, TurboLinux, SuSE Linux, SuSE Linux Enterprise Server 7 ESX Server: Not applicable	Windows .Net Server 2003 Windows 2000 servers	Any version of Linux; FreeBSD
Guest OS	GSX Server: Windows NT, 2000, and .Net servers, Windows XP Home/Professional, Windows 2000 Professional, Windows 95/98/98SE/Me, Windows for Workgroups, Windows 3.1, MS-DOS 6.22; Mandrake Linux, Red Hat Linux, SuSE Linux, SuSE Linux Enterprise Server 7, TurboLinux, FreeBSD ESX Server: Windows 2000 Server, Windows NT4, Red Hat Linux, SuSE Linux, FreeBSD	Windows NT, 2000, and .Net servers, Windows XP Home/Professional, Windows 2000 Professional, Windows 95/98/98SE/Me, Windows for Workgroups, Windows 3.1, MS-DOS 6.22; Mandrake Linux, Red Hat Linux, SuSE Linux, SuSE Linux Enterprise Server 7, TurboLinux, FreeBSD, Netware, OS/2, Solaris x86	Any version of Linux (disparate concurrent versions supported) with Linux host OS; FreeBSD with FreeBSD host OS
Host RAM	GSX Server: 256MB min, 8GB max ESX Server: 256MB min, 64GB max	64GB max	No minimum or maximum
VM/VE RAM	GSX Server: 2GB max ESX Server: 3.6GB max	3.6GB max	64GB max, across 16 CPUs
Concurrent VMs/VEs	GSX Server: 4 per CPU, 16 max ESX Server: 8 per CPU, 64 max	64 max	Up to 2,500 on one physical server
Extensibility	GSX Server: COM/Perl API scripting ESX Server: API scripting	COM API scripting	API scripting, templating