The Thunderbolt port is shown in the top left corner of the first picture. Also seen are the traces leading to what we think is the Thunderbolt controller IC.

In the second picture is the AMD Radeon HD 6490M GPU.

If you're wondering about the AMD GPU, ATI was purchased by AMD in 2006. However, only within the last few months has AMD retired the ATI name and begun branding their graphics chips with AMD.

In the third picture is the quad-core Intel i7 processor.