For anybody wondering the P670s are advertised to be around Cortex-A78 performance, their slides 5% slower on SpecINT2k6, but 50% less area) [0] and have 128 bit vector registers.<p>The X280s are more of an external accelerator with 512 bit wide vector registers and an integrated TPU using Sifives VCIX interface [1]. It enables custom vector coprocessors, in this case a TPU, to interface directly with the vector register file.<p>The X280s will very likely not run the same OS as the main P670s because of their different VLEN, which would't allow for moving processes between them.<p>[0] <a href="https://www.youtube.com/watch?v=C4DcZyB6i1E">https://www.youtube.com/watch?v=C4DcZyB6i1E</a>
[1] <a href="https://www.youtube.com/watch?v=si5w7JQtSDk">https://www.youtube.com/watch?v=si5w7JQtSDk</a>