That's a Xeon 5050. The cache size is 2x2MB ( i suspect whatever tool reported that 2MB was reporting per core) not 4MB as indicated on the Intel site http://ark.intel.com/Product.aspx?id=27210. It's not hard to figure this out. The socket for 5000P is LGA 771. You now go to http://en.wikipedia.org/wiki/List_of_Intel_Xeon_microprocessors search for 3000 MHz and 3 GHz and look for LGA 771 matches with a low amount of cache. That's then 5050 or 5160 where the latter does not support HT http://ark.intel.com/Product.aspx?id=27219

That's a Xeon 5050. The cache size is 2x2MB ( i suspect whatever tool reported that 2MB was reporting per core) not 4MB as indicated on the Intel site Intel® Xeon® Processor 5050 | intel.com. It's not hard to figure this out. The socket for 5000P is LGA 771. You now go to List of Intel Xeon microprocessors | en.wikipedia.org search for 3000 MHz and 3 GHz and look for LGA 771 matches with a low amount of cache. That's then 5050 or 5160 where the latter does not support HT Intel® Xeon® Processor 5160 | intel.com