Clearwater Forest Xeon 6+ Arrives as Intel 18A’s First Big Data Center CPU
Intel has moved its Clearwater Forest Xeon 6+ processors into full mass production, marking a key milestone for the Intel 18A process in the data center CPU market. While Intel’s first 18A products, such as Panther Lake and Wildcat Lake, are aimed at client devices, Clearwater Forest is squarely targeted at enterprise processors and cloud infrastructure. The chips are expected to launch this year and are positioned for high-throughput environments, including 6G infrastructure and edge AI workloads that demand dense compute and power efficiency. Clearwater Forest fits into Intel’s broader Xeon 6 family strategy, which separates performance-optimized P-core designs from efficiency-focused E-core parts. With this move, Intel is signaling that its most advanced manufacturing node is ready for large-scale server deployments, not just notebooks and desktops. That readiness is crucial as hyperscalers and enterprises look for next-generation platforms to power AI, networking, and cloud-native services.
288 Darkmont E-Cores and Massive Cache for High-Throughput Workloads
At the heart of the Clearwater Forest Xeon 6+ design are up to 288 Darkmont E-Cores, arranged across 12 compute chiplets and backed by 576 MB of on-package L3 cache plus 288 MB of L2 cache. This configuration is tuned for dense, parallel workloads where thread count and cache locality matter more than single-thread peak frequency, making it a strong fit for cloud-native microservices, telecom, content delivery, and edge AI inference. The platform supports up to 12-channel DDR5 memory at speeds reaching 8000 MT/s, pairing core density with substantial memory bandwidth. I/O capabilities include up to 96 PCIe Gen 5 lanes and 64 CXL 2.0 lanes, alongside six UPI 2.0 links for multi-socket scalability. With a TDP that can scale up to 450W and support on the LGA 7529 socket in one- and two-socket configurations, Clearwater Forest is clearly engineered for high-throughput, rack-level efficiency in modern data centers.
Intel 18A, Advanced Packaging, and oneAPI: A Platform-Level Play
Clearwater Forest is as much a showcase of Intel’s manufacturing and packaging roadmap as it is a new data center CPU. Built on the Intel 18A process, the chips integrate RibbonFET gate-all-around transistors and PowerVia backside power delivery, both aimed at improving performance-per-watt and enabling higher core densities. On top of that, the design leverages Foveros Direct 3D stacking and EMIB 2.5D packaging, allowing Intel to stitch together multiple chiplets and memory resources into a cohesive package. From a software standpoint, Intel is aligning Clearwater Forest with its oneAPI strategy. The oneAPI 2026.0 toolkit adds full support for these Xeon 6+ parts, alongside upcoming families like Crescent Island, Nova Lake, and Diamond Rapids. For enterprises, this means a unified programming model across Xeon CPUs, Core Ultra, Arc GPUs, and future accelerators, simplifying optimization and helping unlock the theoretical gains of the new architecture in real-world applications.
Performance, Efficiency, and Competitive Pressure in Enterprise Servers
Early testing data from Ericsson underscores Intel’s focus on efficiency with Clearwater Forest. A single Xeon 6990E+ Clearwater Forest processor with 288 cores reportedly delivers a 38% reduction in rack power runtime, more than 60% better performance-per-watt, and 30% higher overall performance compared with a dual-socket Xeon 6780E Sierra Forest platform that also totals 288 cores. Those gains suggest that Clearwater Forest’s combination of Darkmont E-Cores, 18A process technology, and advanced packaging can deliver meaningful improvements at the rack and cluster level. In the competitive landscape, these efficiency and density advances are critical as Intel seeks to regain server CPU market share from rival x86 vendors in data center and enterprise segments. Clearwater Forest gives Intel a high-core-count, E-core-only option for cloud and telecom operators, while the forthcoming Diamond Rapids P-core family—already highlighted in future Dell PowerEdge platforms—will complement it for performance-centric workloads, strengthening Intel’s overall enterprise lineup.