Acer Aspire L350 Service Manual page 45

Parameter Description Options
DVMT/FIXED Memory Size Unified Memory Architecture (UMA) is a concept whereby 64MB, 128MB
system memory is shared by both CPU and graphics
processor. While this reduces cost, it also reduces the
system's performance by taking up a large portion of
memory for the graphics processor.
Intel's Dynamic Video Memory Technology (DVMT) takes
that concept further by allowing the system to dynamically
allocate memory resources according to the demands of
the system at any point in time. The key idea in DVMT is to
improve the efficiency of the memory allocated to either
system or graphics processor.
This is where the DVMT/FIXED Memory BIOS feature
comes in. 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.
Generally, you can leave this BIOS feature at the default
setting of 128MB. This setting works well in systems with
lots of memory (768MB or more). But if you have 384MB or
less of system memory, it is highly recommended that you
restrict the amount of DVMT memory to 64MB. Intel's
graphics processors are not so fast that allocating huge
amounts of memory is going to have any significant effect
on their performance.
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