Hi,
This toshiba has a Mobile Intel® GMA 4500MHD .
It is intergrated to the Motherboard so there is no chance to upgrade it.
It does share memory from the motherboard to run.
Here is the specs for this model:
http://uk.computers.toshiba-europe.c...0-1MC/1058203/
Here is the review for this card:
http://en.wikipedia.org/wiki/Intel_GMA#GMA_X4500
Bill