Newer intel CPUs use 'hyperthreading.' This makes the processor appear as 2 CPUs to the operating system in order to optimise multitasking. However not having one myself I can't tell you whether it's normal to see them listed as '1400' instead of '2800.' It may be easiest to benchmakr the CPU in SiSoft Sandra (just google for it) and see how it compares to a 2.8GHz P4 in order to decide whether it is running at it's correct speed
