ASRock CoreHT User Manual (CoreHT Server Series) - Page 46
North Bridge Configuration
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7.4.2 North Bridge Configuration VT-d Use this to enable or disable Intel® VT-d technology (Intel® Virtualization Technology for Directed I/O). The default value of this feature is [Disabled]. Onboard VGA Share Memory This allows you to set onboard VGA share memory feature. The default value is [Auto]. Configuration options: [Auto], [32MB], [64MB], [128MB], [256MB] and [512MB]. DVMT Mode Select Use this option to adjust DVMT mode. The default value is [DVMT Mode]. DVMT (Dynamic Video Memory Technology) is an architecture that offers breakthrough performance for the motherboard through efficient memory utilization. In DVMT mode, the graphics driver allocates memory as needed for running graphics applications and is cooperatively using this memory with other system components. This item will not be used under Windows® VistaTM / 7 OS because the driver will intelligently detect physical memory available and allocate necessary video memory. DVMT Memory You are allowed to adjust the shared memory size in this item. Configuration options: [128MB], [256MB] and [Maximum]. The option [Maximum] only appears when you adopt the memory module with 1024MB or above. 46