Is this laptop upgradable.

[cardiffcitydylan]

Hi...
I was wondering if theres any way I can upgrade my Toshiba A660-11m It currently got Nvidia GeForce-330M with an
Intel Quad core i7-720QM Processor clocked at 1.60/ 2.80Turbo GHz with 4gb of RAM running on Windows7 Home Premium 64-bit it also got an PCI Express slot (34 mm)
Thanks....

Processor: Intel Core i7-720QM Processor @ 1.60 / 2.80 Turbo GHz
Memory(RAM): 4GB of DDR3 Ram @ 1,066MHz
Graphics Adaptor: NVIDIA GeForce GT 330M
Expansions: (2 × memory slots) (1 × ExpressCard slot (34 mm)

More specifications....

 

[cardiffcitydylan]

I forgot it say if its upgradable what graphics would you recommend.