The Core i7-990X Extreme Edition 3.46GHz Six 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 B slots. For a faster access to the data used most often, this 64-bit Core i7 Extreme 1st Gen. processor features an integrated L1 cache of 32 KB, 256KB L2, and 12MB L3 cache size. In addition, the product has the following manufacturer part number (MPN): BX80613I7990X.