GPUHoarder from Squirrels Research Labs has uncapped one of the 12 Bitmain BM1740 mining chips in a Z9 mini generously provided by greerso (Greerso) · GitHub
The chip has 8x8=64 blocks, with with each block featuring 96 half-stacks of what looks like SRAM. Each half-stack is estimated to contain192Kb, giving a total 144MB per chip, just enough for Equihash (200,9) with negligible solution loss.