How to adjust video memory for Toshiba A305-s6905?

Hello, I bought Toshiba A305-S6905 from best buy last month or more.
Now everything goes well. I am glad to own such a laptop.
The machine's spec describes the graphics card:
"Mobile Intel® Graphics Media Accelerator 4500MHD
Features 128-1294MB dynamically allocated shared video memory for intense detail."
the video memory is dynamically allocated, and the range is 128-1294MB.
I want to know how to get the largest video memory for some games like CS, etc. I tried to manually adjust the video memory size in BIOS, but failed. There is nothing related with video memory option.
please help.
thanks.

There's software installed that does it automatically based on what the system is doing at the time. If you're playing a game, it will give it the necessary video memory.
I am assuming you're asking this because you're not happy with the performance of the game, otherwise you wouldn't be trying to adjust it manually. I am also assuming you're talking about CS. Unfortunately, systems with integrated graphics (what yours has) just aren't cut out for playing graphically-intensive games. You'll need to spend more than $600 for a computer that is good for games.

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