Rev.II turbo-card contains rev.5 060 processor, while rev.I turbo-card contains rev.1 060 processor - with lower overclocking capabilities (not to say with none), higher temperatures and a "bug" (not precisely a bug, rather a "silly solution"), which can be avoided with cpu060 NOSTOREBYPASS entry in your Startup-Sequence. This is why I'm looking for rev.II card.Just for knowing better, what are the differences between different revisions of this board?