Intel's 256-core Xeon 7 CPUs are a Diamond in the rough

Intel's Xeon 7 platform, known as Diamond Rapids internally, was initially planned to launch this year with up to 192 cores and 16 memory channels. However, the launch has been delayed until 2027 to allow the remaining engineering team to refine the chip. At the Hot Chips show, Intel revealed that the chip will not ship with 192 cores, but will instead include 256 performance cores in a single socket.

This platform competes well with AMD's sixth-gen Venice EPYC chips, which also top out at 256 cores. Although Diamond Rapids lacks hyperthreading and is only offered in high-core-count SKUs for HPC applications, it represents Intel's most sophisticated Xeon ever built, akin to AMD's Rome architecture. Intel's 18A-P process technology and 3D packaging techniques enable the chip to deliver high performance with lower power consumption.

The platform features up to 16 memory channels and 128 lanes of PCIe 6.0/ CXL 3/ UPI 3, along with an 8,000 MT/s DDR5 memory configuration. While Intel has skipped EMIB interconnect technology, the chip's architecture is designed for uniform memory access and cost-effective packaging.