Intel's six-core Xeon processor, known as Westmere, has been seen in a leak of an engineering sample today [caution: may not be safe for work). Still identified as a mainstream Core i7 chip by software, the Xeon W5590 example runs at a relatively low 2.4GHz clock speed but has 12MB of Level 3 cache shared between all cores and 256KB of Level 2 cache for each core. With Hyperthreading, which runs
