915G Combo graphic memory

Question

I cant see that how can i fix graphic memory in bios.
How can I configure or arrange graphic memory? For example; how can i
fixed 64 MB? Which program have to be used?
Aperture size option in the bios arranges how much graphic memory reserved from the all system memory. I dont ask that. My problem is how can i fix some memory part in the aperture size memory.
Thank you for your answers...

Answer 1

to Wonkanoby
All of the bottom from the 30262304.pdf in http://www.intel.com
2.2.2 Fixed Memory
Fixed is a memory allocation method addition to the Unified Memory Architecture (UMA) concept, wherein a static amount of page-locked graphics memory is allocated during driver initialization. This fixed amount will provide the total amount of graphics memory available to the system and is intended to provide the user with a guaranteed amount of graphics memory at all times. Once the fixed amount is allocated during OS boot and driver initialization, this system
memory amount will no longer be available to the OS. However, the OS will still report total system memory as including this allocated amount (as opposed to pre-allocated).
2.2.3 DVMT Memory
DVMT is an enhancement of the UMA concept, wherein the graphics driver allocates memory as needed for running graphics applications. The graphics driver is cooperatively using this memory with other system components. If a user is not performing any graphics-intensive operations, most of the DVMT memory can be utilized by the operating system for other uses. In an environment where the user is unlikely to run games that require a large amount of memory, the memory will
be available for other uses such as database applications etc. In an environment where the user is playing games or may not run any data intensive non-graphics applications, the memory will automatically be used to optimize the graphics. Intel recommends using the DVMT setting for better overall system performance.
2.2.4 “Fixed” + “DVMT” Memory “Fixed” + “DVMT” is a memory allocation in addition to the UMA concept, wherein a static amount of page-locked graphics memory is allocated during driver initialization and an additional amount of DVMT graphics memory is allocated and de-allocated based upon system need. This
new memory allocation addition provides guaranteed amount of graphics memory while providing the capability to scale the amount of available graphics memory to a higher amount needed by applications (up to the maximum supported by the GMCH and system memory installation – see table below). This allocation method, Fixed + DVMT, allows for the static allocation of memory to guarantee a minimum amount over that which is pre-allocated and also allows for a more balanced system performance versus the Fixed only allocation method.