AMD's AM4 Platform Details Leaked: µOPGA Based Socket with 1331 Pins, 140W Max TDP [Updated]
It's still PGA, and there's 1331 pins (vs 940 pins used now)
This means that while the µOPGA AM4 socket size will remain approximately the same, it will be much more fragile than previous OPGA based iterations.
More details in the article, including an AMD patent to convert PGA to LGA.
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