Will This Heat Sink Fit?

I just bought a Dell XPS 7100, inside looks like this.

http://www.desktopreview.com/shared/picture.asp?f=6399

Dimensions:

Height: 16.02" (407.75 mm)
Width: 7.31" (185.81 mm)
Depth:17.9" (454.67mm)

OR 16.02 x 7.31 x 17.9 inches (HxWxD)

I want to get a V8 Cool Master heatsink, picture below.

http://www.coolermaster-usa.com/product.php?category_id=1623&product_id=2869

Dimensions:

120 x 128 x 161.1mm

Will this heatsink fit? I have a AM3 socket and the heatsink supports it.