This message was posted on behalf of Intel Corporation
Hello Jacksharkben ,
In most cases, your computer manufacturer has already configured your computer to use the maximum amount of graphics memory possible. This maximum amount supported by your computer can be less than the maximum amount supported by Intel® graphics. Check with your computer manufacturer for the actual maximum graphics memory supported by your computer and if it is possible to increase the amount of graphics memory.
The amount of graphics memory in use is dynamically allocated to balance the needs of the operating system and all running applications.
The link provided above by Stefan3D is good as well.