THE CRUNCH

AMD's upcoming EPYC 9006-series "Verano" CPUs, aimed at AI servers, appear set to use an all-new SB1 socket, according to a cooler listing at server cooling maker Dynatron spotted by InstLatX64. The socket is reportedly smaller than the SP7 and SP8 sockets used by other Zen 6-based EPYC chips, and Verano systems will need different cooling as a result. AMD has not officially confirmed the socket name or disclosed SB1's specifications.

Verano is an unusual EPYC by the family's standards. It offers up to 72 Zen 6 cores at up to 5 GHz, paired with a 24-channel LPDDR5X memory subsystem built on replaceable SOCAMM2 modules. AMD positions it as a host processor for AI servers, where the CPU's job is to orchestrate workloads running on AI accelerators rather than deliver maximum general-purpose performance. That specialisation could explain a dedicated socket instead of reusing SP7, which accommodates up to 256-core EPYC "Venice" chips, or SP8, designed for models with up to 128 cores.

Dynatron's preliminary SB1-4U-Active cooler offers the first hint of Verano's cooling needs. The 4U unit measures 128.05 by 106.6 by 130.7 mm and combines an aluminium fin stack with a vapor chamber and heat pipes, driven by a double-ball-bearing fan at up to 6,000 RPM delivering up to 91.7 CFM. Those figures are virtually identical to Dynatron's J26 cooler for the larger SP7 CPUs, which may mean the design was reused or that the specifications are simply placeholders until the cooler is finalised. The listing gives no maximum supported processor power, so it cannot yet pin down Verano's TDP, though a large vapor-chamber 4U cooler suggests a high-power chip despite its comparatively modest core count.

One open question is how many Verano models AMD plans to offer. Because the chip targets systems with a set number of Instinct accelerators, AMD could ship just one or a few configurations to keep a consistent ratio of cores, memory bandwidth and host-to-accelerator connectivity, an approach Nvidia takes with its Grace and Vera processors. That is speculation for now, as AMD has announced no SKU plans, but it would fit a dedicated, tightly optimised socket. An earlier report on the same Dynatron listing by TechPowerUp adds that the "B" in SB1 could point to a BGA package soldered to the board, although that is a guess based on the name and nothing official, and AMD itself has not revealed the socket name.