Just to be clear, we have not yet moved to a 64bit rendering engine, we are only taking advantage of large address support, so in 64 bit Windows we can use up to 4GB (I think) of memory, even though it's a 32bit app still.
And no I don't think a larger cache will make a significant difference in itself (i.e. given two versions of the same CPU, one with a larger cache, they will perform fairly similarly). But that assumption is not based on much actual testing, it's more a general sense from looking at historical benchmark results for TG and other apps. There are a fairly narrow range of applications that actually do significantly benefit from larger caches.
- Oshyan