Arrange Layers
Now let’s organize layers. Drag the "Metal Right" layer below the "Top Extrude" layer and drag the "Metal Left" layer below the "Bottom Extrude" layer.

Extrude
Now go to Layers Panel, select the "Top Extrude" layer, right click and choose Rasterize Layer or go to Layer > Rasterize > Layer. Get the Move Tool, make sure Zoom is set to 100% and move the layer 20 pixels up by holding down the Shift key and pressing the up arrow two times. Duplicate the layer and name it "Top".

Extrude
Command-click the "Top Extrude" layer to load the selection. Select the "Top Extrude" layer in the Layers Panel as well. Get the Move Tool, holding down the Alt key, press Down Arrow 20 times and deselect. Drag a Vertical guide and place it at the corner of the microchip as in the below image.

Shading
Get the Rectangular Marquee Tool and make a selection like in the below image. Hit Command+U to bring up the Hue/Saturation dialog and set Lightness to -20. Then go to Select > Inverse. Hit Command+U again and set Lightness to -40 this time and deselect.

Shading
Apply a Gradient Overlay Layer Style to the "Top Extrude" layer using these settings: Blend Mode => Overlay, Opacity => 50%, Gradient => Black, White, => Style => Linear, Angle => 90. Then apply a Gradient Overlay to the "Top" layer and use these settings: Blend Mode => Normal, Opacity => 45%, Gradient => Black, White, Reverse => Checked, Style => Radial, Scale => 150% and drag the center of the gradient on the canvas to get something similar to the below image.

Shade the Dent
Create a new layer above the "Top Extrude" layer and name it "Shade". Get the Rectangular Marquee Tool and make a selection that is as wide as the dent like in the below image. Get the Gradient Tool, pick Foreground to Transparent and set Foreground Color to Black. Fill the selection with the gradient as below. Then Alt-click the line between "Top Extrude" and "Shade" layers to mask the shade. Hit Command+D to deselect.

Bevel
Command-click the "Top" layer thumbnail to load the selection and select this layer in the Layers Panel. Get the Rectangular Marquee Tool, move the selection 2 pixels up by pressing the Up Arrow Key twice. Go to Select > Inverse. Holding down the Alt key, make a selection like in the below image to substract from the current selection. Hit Command+U and set Lightness to 50 to lighten the left edge of the top part.

Bevel
Command-click the "Top" layer thumbnail to load the selection and move the selection 2 pixels up again. Go to Select > Inverse. Holding down the Alt key, make a selection like in the below image to substract from the current selection. Hit Command+U and set Lightness to -15 to darken the right edge of the top part.

Keep Extruding
Make the "Bottom Extrude" layer visible and rasterize it. Duplicate the layer and name it "Middle". Go back to "Bottom Extrude" layer, Command-click it’s thumbnail to load the selection, making sure the Zoom is set to 100%, get the Move Tool, holding down the Alt key press Down Arrow 20 times.

Shading
Get the Rectangular Marquee Tool and select the left part of the "Bottom Extrude" layer. Hit Command+U and set Lightness to -20. Then go to Select > Inverse, hit Command+U again and this time set Lightness to -40 and deselect.