it was announced a while ago, and samsung/foxconn have already confirmed this for all but the top. and TSMC has not reported any meaningful 28nm shipments to NV, they did 2 wafers for MS and it got out then production got out this week but they did confirm when amd got large 28nm shipments.
they redid the 500 power tracing on most but the lowest end chips (that never really hit market in the 400), its like the 100, and 300 were its a direct rename for OEM only. and if not why would they have a 96 shader chip with a 128 bit buss, that would not fit on a 28nm chip without allot of creative core cutting.
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