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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="intro-64bitguests">
<title>64-bit Guests</title>
<body>
<note>
<p>Be sure to enable <b outputclass="bold">I/O APIC</b> for virtual machines that you intend to use in 64-bit
mode. This is especially true for 64-bit Windows VMs. See <xref
href="settings-motherboard.dita#settings-motherboard"/>. For 64-bit Windows guests, ensure that the VM uses
the <b outputclass="bold">Intel networking device</b> because there is no 64-bit driver support for the AMD
PCNet card. See <xref href="nichardware.dita#nichardware"/>. </p>
</note>
<p>If you use the <b outputclass="bold">Create VM</b> wizard of <ph conkeyref="vbox-conkeyref-phrases/vbox-mgr"/>,
<ph conkeyref="vbox-conkeyref-phrases/product-name"/> automatically uses the correct settings for each selected
64-bit OS type. See <xref href="create-vm-wizard.dita#create-vm-wizard"/>. </p>
</body>
</topic>
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