Incidentally, there have been rumors that the new 90nm Athlon 64s incorporate some planned enhancements to the K8 core, including SSE3, better data prefetch, additional write combining buffers, and a tweaked memory controller. We haven't yet been able to confirm with AMD whether the new 90nm chips include these changes, but the preliminary indications seem to be negative. CPU-Z identifies this chip as a Winchester core and doesn't list SSE3 among the supported extensions. More tellingly, I've run a handful of synthetic memory benchmarks on the 90nm 3500+, and scores didn't differ significantly from the 130nm chip in my preliminary tests. For now, the new 90nm chips appear to be a successfully die shrunk version of the current Athlon 64: cooler, with less appetite for power, and otherwise largely unchanged.