4 ms·
What about the dies that aren't 100% perfect, and don't work at those high end specs? If there's a defect in a core or two, or in some area of cache, why not tr
by theandrewbailey 8y ago
What about the dies that aren't 100% perfect, and don't work at those high end specs? If there's a defect in a core or two, or in some area of cache, why not trim it down to a lower spec part and sell it for something (rather than scrapping it)?
- nilsbunger 8y agoI think the case of HT is more pure "segmentation", and a little different. I bet most of the parts that ship with HT disabled have all threads working. The number of transistors involved in HT are quite small. There are probably very few cores where one thread works and the other doesn't, compared to the number of CPUs that work or don't work because their cache or something more fundamental is screwed up by a defect. I wouldn't be surprised if they don't even test for one thread working and the other not, and the "defeaturing" is a separate step after yield binning.