Fujitsu taps Broadcom's 3D chip tech for 144-core Monaka CPU

Fujitsu’s 144-core Monaka CPU will be built using 3D-chip stacking tech from Broadcom, the merchant silicon slinger revealed on Thursday.

Fujitsu is an old hand at CPU design. Its Arm-based A64FX catapulted the original Fugaku supercomputer to the number one spot on the Top500 in 2020.

Monaka is a very different animal. Gone is the on-package HBM, replaced instead by an SRAM-heavy architecture similar in principle to AMD's Genoa-X CPUs.

That platform used AMD's 3D V-Cache tech to stack 64 MB SRAM chiplets on top of the CPU's compute dies. In its top-specced config, the CPU boasted more than a gigabyte of L3 cache.

Fujitsu is going for something similar with Monaka, although the chip is aimed at a broader datacenter market. The chip's four 2nm compute dies, each with 36 Armv9 cores, will ride atop an equal number of SRAM chiplets fabbed on a ...