Intel Xeon Processor 7150N - 3.5 GHz 667 MHz 2 x 1 MB L2 & 16 MB L3 Cache Upgrade (43V4553) supports internal processing speeds of 3.5 GHz and external processing operations to memory at 667 MHz. It contains an integrated, full-speed, 2 MB Level 2 cache and 16 MB Level 3 cache.