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<?xml version='1.0' encoding='UTF-8'?>
<!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
<topic xml:lang="en-us" id="create-vm-wizard-hardware">
<title>Set Up VM Hardware</title>
<body>
<ol id="ol_ndb_dbx_4bc">
<li>For <b outputclass="bold">Base Memory</b>, select the amount of RAM that <ph
conkeyref="vbox-conkeyref-phrases/product-name"/> should allocate to the virtual machine
(VM) every time it is started. The guest OS will report this size as the VM's installed RAM.
<note type="caution" id="note_pjs_x1x_4bc">
<p>Choose this setting carefully. The memory you give to the VM will not be available to
your host OS while the VM is running. </p>
</note><p>Do not specify more than you can spare, whilst ensuring you allocate enough for
your guest OS and applications to run properly. For example, if your host machine has 4 GB
of RAM and you enter 2048 MB as the base memory for a VM, you will have 2 GB left for all
the other software on your host while that VM is running. </p><p>A guest OS may require at
least 1 or 2 GB of memory to install and boot up. If you intend to run more than one VM at
a time, plan accordingly. A VM will not start if it does not have enough RAM to
boot.</p><p>Always ensure that the host OS has enough RAM remaining. If insufficient RAM
remains, the system might excessively swap memory to the hard disk, which will effectively
bring the host system to a standstill. </p></li>
<li>For <b>Processor(s)</b>, select the number of virtual processors to assign to the VM. Do
not assign more than half of the total processor threads from the host machine. </li>
<li>Select <b outputclass="bold">Enable EFI</b> if you want to enable Extensible Firmware
Interface (EFI) booting for the guest OS.</li>
<li>Click <b outputclass="bold">Next</b> to <xref
href="create-vm-wizard-virtual-hard-disk.dita"/>. </li>
</ol>
</body>
</topic>
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