I've compared both of them: Intel i7-920 http://ark.intel.com/products/37147/Intel-Core-i7-920-Processor-8M-Cache-2_66-GHz-4_80-GTs-Intel-QPI Dual Intel Xeon L5630 http://ark.intel.com/products/47927/Intel-Xeon-Processor-L5630-12M-Cache-2_13-GHz-5_86-GTs-Intel-QPI What i found, Xeon is far better than 920.
That is correct - Xeon-setups are usually better for servers in general, mostly because they support quite a lot more RAM. In a dual setup, they will almost ALWAYS outperform regular CPUs, simply because of the architecture.