To install and use ESXi 5.5, your hardware and system resources must meet the following
1 ESXi 5.5 will install and run only on servers with 64-bit x86 CPUs. 2 ESXi 5.5 requires a host machine with at least two cores. 3 ESXi 5.5 supports only LAHF and SAHF CPU instructions. 4 ESXi 5.5 requires the NX/XD bit to be enabled for the CPU in the BIOS. 5 ESXi requires a minimum of 4GB of physical RAM. Provide at least 8GB of RAM to take full advantage of ESXi features and run virtual machines in typical production environments. 6 To support 64-bit virtual machines, support for hardware virtualization (Intel VT-x or AMD RVI) must be enabled on x64 CPUs. 7 One or more Gigabit or 10Gb Ethernet controllers. For a list of supported network adapter models
Open VMware Workstation 10 & from the VMware Workstation toolbar, click File > New Virtual machine. Click Custom (advanced), then click Next.
Select the hardware compatibility for the virtual machine, then click Next.
Click Installer disk Image file (ISO), and browse and open the ESXi ISO file downloaded from the VMware Download Center.
Enter a name for your virtual machine and choose where to save it, then click Next.
Follow the on-screen options to configure the virtual machine. Use the defaults unless you need to make changes for your environment.
Click Power on the virtual machine after creation. When the virtual machine powers on and the installation starts, choose ESXi-5.x.x-build_number-standard Installer, or wait 5 seconds. On the Welcome screen, press Enter to continue.