7600go The good, The bad, The ugly...

So I recently purchased a Toshiba A100-TA9
It features a 15.4" screen
2 gigs of ram
Core 2 Duo 5600 1.83 ghz
and a go 7600 128mb.

The problem with this laptop is the go 7600 has a crippled 64 bit memory interface. I was wondering if their was a way to "uncrilppe" it, unfortunately I believe this is in the circuitry unless I am proven wrong. Anyways I feel quite mislead by this purchase, considering every single go 7600 and 7600's for desktop feature a 128bit interface. No where was it mentioned it was a crippled edition. What should I do? I am quite informed on PC hardware, but I felt their was no way to check this issue in advance or to be informed about it.

*What is odd about it, is it features 12 active pixel pipelines... when usualy it is 8, yet the crippled buswith still kills it

So what should I do, can the PCI-E slot in the A100's series put in something better?

Thanks