Database Smart Flash Cache on F80 PCIe Card

We are considering the purchase of a F80 PCI flash accelerator
card so we can take advantage of the 11G database smart flash cache
feature.  But the documentation states to
size database smart flash cache between 2 and 10 times the size of
SGA_TARGET.  Our SGA_TARGET to 20GB and
the F80 PCI flash accelerator card is 800GB, so I will at most be using 200GB
of the 800GB available for database fast cache.
Does anyone know how I can use the remaining 600GB of cache on the F80
card?

Database version is 11.2.0.1 on Solaris 10.

Thanks,

John