Recently Anandtech wrote up an article comparing the Latest Intel Xeon 54xx series Harpertown 45nm processor, with Xeon 53xx series and AMD‘s 3rd generation Opteron cpus. The new Intel processor 54xx is an manufactured using the latest in nanotechnology, the processor takes only 107 mm² and contains somewhere around 410 million transistors. The cpu runs cool and is about 20% faster than the previous model 53xx.

Xeon 54xx
(thats 2 cores fit inside a penny)