The last CPU to be revised with an update to Core architecture is the MP-capable Xeon, with the eagerly-anticipated multi-processor capable Tigerton on the horizon. Intel announced today that the Tigerton will start out as the Quad-Core Xeon 7300 series, and will using the Clarksboro chipset.
With a very low relative TDP of 50W, the new CPU also boasts significantly increased performance over the older core Xeons. We can pretty much be assured this will be the case, due to the night and day difference that Core brought over the older P4 architecture.
These CPUs are aimed at the higher end of x86 computing, for companies wanting systems sporting eight or more cores in a single box. Unless AMD does something fast, Intel will be the first to market with quad-core systems capable of multiple CPUs.