PFG-1 Sophon: 330 GB On-Die DRAM, 4,200 TFLOPS FP8 on 750mm² Die

PhantaField's PFG-1 Sophon is a monolithic 3D AI ASIC using 32-tier 2D-TMD gain-cell DRAM to put 330 GB of weight storage on-die, eliminating HBM entirely. At 131,072 compute-in-memory tiles running 500 MHz bit-serial activation, it claims 4,200 TFLOPS FP8 and 2,100 TFLOPS BF16 on a single 750mm² die built on 28nm CMOS. The same die handles both training and low-batch inference decode at compute-bound rates.