Why is this bullshit upvoted?
Already the first sentence, they change from the headline “without recoding” to “with further optimization”.
Then the explanation “a companion chip that optimizes processing tasks in real-time”
This is already done at compiler level and internally in any modern CPU for more than a decade.
It might be possible to some degree for some specific forms of code, like maybe Java. But generally for the CPU this is bullshit, and the headline is decidedly dishonest.
Yes you are 100% right, and I did consider level 3 cache as a better measure, because that allows communication between cores without the need to go through RAM, and cache generally has a high hit rate. But this number was surprisingly difficult to find, so I settled on the data bus.
Anyways it would be absolutely fair to call it 256bit by more than one measure. But for sure it isn’t just 64 bit, because it has 512 bit instructions, so the instruction set isn’t limited to 64 bit. Even if someone was stubborn enough to claim the general instruction set is 64 bit, it has the ability to decode and execute 2 simultaneous 64 bit instructions per core, making at least 128 bit by any measure.