"Ultra" Specification
GPU: Latest DirectX 11 graphics card with 2 GB Video RAM or more
CPU: Latest Eight core or more
RAM: 8GB or more

example 1
GPU: Nvidia GTX 670
CPU: Intel Core i7-3930K

example 2
GPU: AMD Radeon HD 7970
CPU: AMD FX-9370 Eight-Core
Ist der i7-3930K nicht ein Sechskerner?