I asked NVidia on their website, and they answered (somewhat testily, and perhaps with a resigned air)
Thank you for contacting NVIDIA Customer Care.
Yes, the Geforce Go 7800 GPU can support up to 512 MB...
Originally Posted by PcGeek04
Yes, you can use those too, just remember, the 667Mhz ram has a CAS of 5-5-5-x where as the 533Mhz ram like the OCZ stuff mentioned in the posts above have CAS timings of 4-4-4-8 for...
Originally Posted by t024484
The 7800 Go has four Gddr3 Memory modules soldered on the PCB, totaling 128Mbyte.
That's all there is, no upgrading possible.
so why do they sell it as a 256 MB card then?
Originally Posted by Geth2
Hmm - the fact that that is on a GeForce Go 7800 GTX FAQ makes me think that this is only on GTX's, which, currently, means it won;t be for a 9400 (afaik - having read the dicussions...
Originally Posted by SirBA
same chassis but comes with...
... the latest mobile intel chipset meaning different main board 945PM
... 667mhz ram
... dual core cpu
... better GPU 7800 go vanillia