ASRock H370M-HDV/M.2 Software/BIOS Setup Guide - Page 38

Chipset Configuration, Primary Graphics Adapter, Above 4G Decoding, PCIE1 Link Speed - m 2 compatibility

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3.4.2 Chipset Configuration Primary Graphics Adapter Select a primary VGA. Above 4G Decoding Enable or disable 64bit capable Devices to be decoded in Above 4G Address Space (only if the system supports 64 bit PCI decoding). VT-d Intel® Virtualization Technology for Directed I/O helps your virtual machine monitor better utilize hardware by improving application compatibility and reliability, and providing additional levels of manageability, security, isolation, and I/O performance. PCIE1 Link Speed Select the link speed for PCIE1. PCIE2 Link Speed Select the link speed for PCIE2. PCI Express Native Control Select Enable for enhanced PCI Express power saving in OS. 34

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34
3.4.2
Chipset Configuration
Primary Graphics Adapter
Select a primary VGA.
Above 4G Decoding
Enable or disable 64bit capable Devices to be decoded in Above 4G Address Space
(only if the system supports 64 bit PCI decoding).
VT-d
Intel® Virtualization Technology for Directed I/O helps your virtual machine
monitor better utilize hardware by improving application compatibility and
reliability, and providing additional levels of manageability, security, isolation, and
I/O performance.
PCIE1 Link Speed
Select the link speed for PCIE1.
PCIE2 Link Speed
Select the link speed for PCIE2.
PCI Express Native Control
Select Enable for enhanced PCI Express power saving in OS.