CPU Direct Access FB – BIOS Optimization Guide

CPU Direct Access FB - BIOS Optimization Guide

CPU Direct Access FB

Common Options : Enabled, Disabled

 

Quick Review

This BIOS feature controls the processor’s access to the section of system memory reserved for use by the integrated graphics processor as graphics memory. Please note that we were referring to the CPU, not the graphics processor.

When enabled, the processor is allowed to directly write to the section of system memory reserved as graphics memory. This increases the performance of applications that write directly to the frame buffer.

When disabled, the processor is not allowed to directly write to the section of system memory reserved as graphics memory. This reduces the performance of applications that write directly to the frame buffer.

It is recommended that you enable this BIOS feature for maximum performance. Of course, this only improves performance of applications that write directly to the frame buffer.

 

Details

This BIOS feature is found in VIA-based motherboards with integrated graphics processors. The integration of the graphics processor into the motherboard chipset reduces the cost of building the PC.

To further reduce cost, the integrated graphics processor does not come with dedicated graphics memory. Instead, part of system memory is cordoned off and used exclusively by the graphics processor as graphics memory.

This BIOS feature controls the processor’s access to the section of system memory reserved for use by the integrated graphics processor as graphics memory. Please note that we were referring to the CPU, not the graphics processor.

When enabled, the processor is allowed to directly write to the section of system memory reserved as graphics memory. This increases the performance of applications that write directly to the frame buffer.

When disabled, the processor is not allowed to directly write to the section of system memory reserved as graphics memory. This reduces the performance of applications that write directly to the frame buffer.

It is recommended that you enable this BIOS feature for maximum performance. Of course, this only improves performance of applications that write directly to the frame buffer.

Please note that this BIOS feature has no effect on the frame buffer of any discrete graphics card that you install. It only controls the processor’s access to the section of system memory reserved for use by the integrated graphics processor as graphics memory.

 

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