how to increase vram in laptop

[rayanthetechpro]

i have a vaio laptop and my gpu is ati mobility radeon hd 4500
it has 1GB vram and im looking to increase it my specs are the following

intel pentium duel core @1.87GHz
2GB ddr3 ram
windows 8.1
and gpu is ati mobility radeon hd 4500

 

[Phillip Corcoran]

Look in the BIOS settings to see if shared RAM can be increased, but I very much doubt it can be if it's already set at 1GB, that's probably maxed out already. Additionally, you've only got 2GB of installed RAM so if you assign any more of that to the GPU, Windows is really going to struggle & slow down.

 

[ffg7]

what is the model# of the vaio?