[imtringued]

https://cloud.google.com/tpu/docs/system-architecture-tpu-vm...

>The primary task for TPUs is matrix processing, which is a combination of multiply and accumulate operations. TPUs contain thousands of multiply-accumulators that are directly connected to each other to form a large physical matrix. This is called a systolic array architecture. Cloud TPU v3, contain two systolic arrays of 128 x 128 ALUs, on a single processor.

[robinhouston]

I don't see any contradiction between your claim that TPU v3 uses systolic arrays and the parent post's claim that TPU v4 does not.