> the XCGPU you mentioned, Andreas, may be two separate dies
> under a common heatspreader.

Seems it is not:

http://arstechnica.com/gaming/news/2010/08/microsoft-beats-intel-amd-to-market-with-cpugpu-combo-chip.ars
http://www.eetimes.com/electronics-news/4206424/Microsoft-IBM-Xbox-360-250G-chip

Edit: added link to another article

[ Edited by Andreas_Wolf on 2010/8/25 6:36 ]