The Core i7 Extreme Edition 3940XM 3 GHz Quad-Core processor from Intel offers both performance and efficiency. The CPU features DMI Speed, 5 GT/s bus speed, and it is compatible with PC motherboards with integrated Socket G1 slots. The 64-bit Core i7 Extreme third generation processor features an integrated L1 cache of 32 KB, 256 KB L2, and 2 MB L3 cache size, for faster access to the most frequently used data. The clock speed of 3 GHz is an advantage for gamers, where speed is a special concern. Turbo Boost means that speed is adjustable in response to demand, so the unit uses less energy for the same high performance.