Many Quad Core processors are composed of two separate dies, which means some cached data has to travel outside the processor to get from core to core. That's an inefficient way to access information. Enter the Quad-Core Intel Xeon "Nehalem" processor. Its simple-die, 64-bit architecture makes 8MB of fully shared L3 cache data and greater application performance. The result is faster access to cache data and greater application performance. Combine that with the other technological advances and you get an IPS System that's up to 2.0 faster than the previous generation.

System memory is often connected to a processor through a separate  I/O controller. But each Intel Xeon "Nehalem" processor features an integrated memory controller  - another leap foreward for workstation system architecture. By connecting memory direct to the processor, the new IPS Nehalem Workstation processors have faster access to data stored in memory, and memory latency is reduced by up to 40% percent.

The integrated memory controller, along with fast DDR3 1333/1066MHz Registered ECC SDRAM also gives the IPS system up to 2.5x increase in memory bandwidth 

over previous generations. More bandwidth allows for more data to be fed to the processor faster, helping each core spend its time processing data, not waiting for information to arrive. And error correction Code (ECC) corrects single-bit errors automatically. That's especially imported in mission critical and compute-intensive environment.