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ESXi 5.5 will install and run only on servers with
64-bit x86 CPUs.
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ESXi 5.5 requires a host machine with at least two
cores.
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ESXi 5.5 supports only LAHF and SAHF CPU
instructions.
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ESXi 5.5 requires the NX/XD bit to be enabled for the
CPU in the BIOS.
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ESXi supports a broad range of x64 multicore
processors. For a complete list of supported processors.
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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.
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To support 64-bit virtual machines, support for
hardware virtualization (Intel VT-x or AMD RVI) must be enabled on x64 CPUs.
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One or more Gigabit or 10Gb Ethernet controllers. For
a list of supported network adapter models.
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Any combination of one or more of the following
controllers:
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Basic SCSI controllers. Adaptec Ultra-160 or
Ultra-320, LSI Logic Fusion-MPT, or most NCR/Symbios SCSI.
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RAID controllers. Dell PERC (Adaptec RAID or LSI
MegaRAID), HP Smart Array RAID, or IBM (Adaptec) ServeRAID controllers.
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SCSI disk or a local, non-network, RAID LUN with
unpartitioned space for the virtual machines.
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For Serial ATA (SATA), a disk connected through
supported SAS controllers or supported on-board SATA controllers.
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