Intel Xeon X3330 2.66 Ghz 6M L2 Cache 1333MHz FSB LGA775 Quad-Core Processor Industry leading performance headroom, especially for multi-threaded applications, helps boost system utilization through virtualization and application responsiveness. Low power, high performance computing architecture Increases efficiency of L2 cache-to-processor data transfers, maximizing main memory to processor bandwidth and reducing latency. Entire L2 cache can be allocated to one core Fast system bus speeds for increased throughput New processor hardware enhancements that support software-based virtualization, enabling migration of more environments - including 64-bit OSs and applications - to virtual environments.