The Xeon E5420 2.5 GHz Quad-Core processor from Intel is engineered to deliver performance and power efficiency. Compatible with PC systems, the CPU can be installed on motherboards with integrated Socket J slots. For a faster access to the data used most often, this 64-bit Xeon processor features an integrated L1 cache of 32 KB, 3 MB L2, and 12 MB L3 cache size. In addition, the product has the following manufacturer part number (MPN): BX80574E5420P.