Acer Aspire L310 Service Manual page 47

Parameter
On-Chip Frame Buffer Size
DVMT Mode
DVMT/FIXED Memory Size
Chapter 2
Description
This BIOS feature controls the amount of system memory
that is allocated to the integrated graphics processor when
the system boots up. Please visit http://www.rojakpot.com/
showFreeBOG.aspx?lang=0&bogno=325 for more detailed
settings.
The BIOS feature that controls all this is the DVMT Mode
BIOS feature. It allows you to select the DVMT operating
mode.
When set to Fixed Mode , the graphics driver will reserve a
fixed portion of the system memory as graphics memory.
This ensures that the graphics processor has a guaranteed
amount of graphics memory but the downside is once
allocated, this memory cannot be used by the operating
system even when it is not in use.
When set to DVMT Mode, the graphics chip will
dynamically allocate system memory as graphics memory,
according to system and graphics requirements. The
system memory is allocated as graphics memory when
graphics-intensive applications are running but when the
need for graphics memory drops, the allocated graphics
memory can be released to the operating system for other
uses.
When set to Combo Mode , the graphics driver will allocate
a fixed amount of memory as dedicated graphics memory,
as well as allow more system memory to be dynamically
allocated between the graphics processor and the
operating system.
It is recommended that you set this BIOS feature to DVMT
Mode for maximum performance. Setting it to DVMT Mode
ensures that system memory is dynamically allocated for
optimal balance between graphics and system
performance.
It allows you to set the maximum amount of system
memory that can be allocated as graphics memory, but only
for the Fixed or DVMT operating modes. When the DVMT +
Fixed mode is selected, this BIOS feature is grayed out
because when in that operating mode, the graphics driver
automatically allocates a total of 128MB of graphics
memory.
When set to 64MB, up to 64MB of system memory can be
used as graphics memory.
When set to 128MB, up to 128MB of system memory can
be used as graphics memory.
Options
1MB, 4MB, 8MB,
16MB, 32MB,
64MB, 128MB (for
UMA)
1MB, 8MB (for
DVMT)
Fixed Mode
DVMT Mode
Combo Mode
64MB
128MB
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