Re: 169.07 Ubuntu 7.10 Fan at %100
The amount of 'turbocache' of addressable turbocache for some cards depends on the amount of system memory. The manual of the card mentions how it scales.
Second for midend-highend desktop cards with turbocache the feature is 'useless' (not that useless, it is still useful for transferring data from memory to the gpu which is always done) but it should rarely get used for real purposes. Turbocache is mainly marketed on lowend cards which have small memory busses and not much and fast video memory. For those system memory isn't that slow.