NVIDIA Tegra processor front and center. In a stark contrast to Apple's relationship with Samsung, NVIDIA's product page actually has a link to buy the Zune HD.
To the right is the SiPORT HD Radio receiver. This chip supports AM, FM, HD Radio, Microsoft MSN Direct Data Services, and a slew of other frequencies (including the Weather Band).
The SDRAM is Hynix! H5MS1G22MFP J3M 926A. In the upper left, is a 1GB Hynix Mobile DDR SDRAM.
The accelerometer is below the Hynix SDRAM and to the left of the Nvidia processor. It's a Kionix KXSD9.
Images by iFixit, used by permission
Cracking Open the Microsoft Zune HD
by Mark Kaelin | September 18, 2009, 11:40am PDT | Image 13 of 30