Originally Posted by paperwastage
0928 says 2009 28th week...
mines 0940, 2009 40th week... unlockable...
either you subscribe to one of three axioms
1) Earlier in manfacturing, AMD needs to fulfill demand of dual cores, and bin more x4 to x2
2) Later in manufacturing, better process, fewer faulty cores, easier to get a good x4 chip...
3) Get lucky...
I would say (3) is the most valid choice
Unless the evidence contradicts it, the most reasonable chain of events looks like this:
1. Fab issues cause faulty cores
2. AMD uses chip harvesting to create lower core count chips at a more afforable price point (larger market for $99 and under)
3. Demand increases for said price point
4. AMD purposely deactivates cores on chips in order to sell a larger quantity of product at a lower price point, potentially reaching a break-even point, or even a small profit
5. AMD fabricators correct the fab process, meaning most chips are successful quads
6. AMD begins taking a loss, because more people are buying lower-cost harvested chips
7. AMD slowly phases out dual- and tri-core Phenoms and lowers prices on quads, since now the Athlon II chips fill their low-cost market segment
8. The few remaining X2 and X3 chips are either purposefully deactivated-core quads, or deactivated via fab errors (process will never be 100% successful).
AMD now sells more Athlons than Phenoms, because most customers are not interested in paying more than 100 bucks for a CPU. I could go on and on, but you get the point.