There's a good, long article on development of Xbox 360 from Dean Takahashi here:
http://www.reed-electronics.com/eb-mag/article/CA6328378?pubdate=5/1/2006
There's a good number of interesting bits in there, including:
- some of the original designs called for a 60-shader GPU and 16-core CPU
- IBM initially pitched Waternoose as a 3.5Ghz processor
- MS didn't finalise contracts immediately to keep their options open. At one point in 03, ATi's president thought they had lost the contract to nVidia. nVidia's president comments that 360 "wasn't a good deal" for them - if they were going to deviate in a large way from their PC line, they want $$$ for it.
- During the Xenon team's final pitch, Gates enquired if the box would ever be able to run a full version of Windows. They approved the Windows-less box, however.
- Initial tapeouts for Xenon and Xenos were Oct 04 and Sept 04 respectively. Final tapeouts were Jan 05 and July 05 respectively - ATi ran into a spot of bother getting Xenos finalised on time.
- In Spring 05, MS bumped the amount of memory in 360 for fear of Sony's plans, to 512MB. This will cost them $900m more than expected over 5 years, and has forced them to pare back spending elsewhere to meet profitability targets.
- Slow GDDR3 sticks were indeed one of the key causes of 360 shortages.
http://www.reed-electronics.com/eb-mag/article/CA6328378?pubdate=5/1/2006
There's a good number of interesting bits in there, including:
- some of the original designs called for a 60-shader GPU and 16-core CPU
- IBM initially pitched Waternoose as a 3.5Ghz processor
- MS didn't finalise contracts immediately to keep their options open. At one point in 03, ATi's president thought they had lost the contract to nVidia. nVidia's president comments that 360 "wasn't a good deal" for them - if they were going to deviate in a large way from their PC line, they want $$$ for it.
- During the Xenon team's final pitch, Gates enquired if the box would ever be able to run a full version of Windows. They approved the Windows-less box, however.
- Initial tapeouts for Xenon and Xenos were Oct 04 and Sept 04 respectively. Final tapeouts were Jan 05 and July 05 respectively - ATi ran into a spot of bother getting Xenos finalised on time.
- In Spring 05, MS bumped the amount of memory in 360 for fear of Sony's plans, to 512MB. This will cost them $900m more than expected over 5 years, and has forced them to pare back spending elsewhere to meet profitability targets.
- Slow GDDR3 sticks were indeed one of the key causes of 360 shortages.