Clearwater Forest Reaches Full Production on Intel’s 18A Process Node
Intel has confirmed that its Clearwater Forest Xeon 6+ processors are now in full mass production on the 18A process node, with a launch targeted for later this year. Clearwater Forest is the flagship Intel data center CPU for its next manufacturing wave, sitting alongside client-focused Panther Lake and Wildcat Lake chips that also use 18A. The node combines RibbonFET and PowerVia transistor technologies with advanced Foveros 3D stacking and EMIB packaging to push power efficiency and density. Intel CEO Lip-Bu Tan has highlighted that 18A yields are currently improving by about 7 percent each month, positioning the node as a proof point for Intel’s broader foundry comeback. Success here is critical: Clearwater Forest is the first high-volume 18A server product and a centerpiece in convincing cloud, telecom, and AI customers that Intel’s process roadmap is back on track.
Inside Xeon 6+: 288 Darkmont E-Cores and 576 MB of L3 Cache
Clearwater Forest Xeon 6+ leans fully into Intel’s E-core architecture, built around the new Darkmont microarchitecture. Each top-end chip integrates up to 288 E-cores across 12 compute chiplets, backed by a huge 576 MB of on-package L3 cache and 288 MB of L2 cache. This design targets extreme core density and parallel throughput rather than traditional per-core peak frequency. Platform-wise, Xeon 6+ will support up to 12-channel DDR5 at speeds reaching 8000 MT/s, six UPI 2.0 links at up to 24 GT/s per lane, 96 PCIe 5.0 lanes, and 64 lanes of CXL 2.0. TDP scales up to 450 W and the CPUs will drop into new LGA 7529 sockets in both single- and dual-socket configurations. Together, these features outline a platform tuned for high-core, memory-bandwidth-hungry workloads in modern data centers.
Workload Targets: 6G, Edge AI, and High-Density Cloud Compute
Intel positions Clearwater Forest Xeon 6+ primarily for emerging 6G, edge AI, and cloud-native workloads where thread-level parallelism and power efficiency matter more than maximum single-thread speed. Telecom vendors, for example, can consolidate more virtual network functions onto fewer racks, aided by the 288-core configuration and generous memory bandwidth. Ericsson’s tests of a 288-core Xeon 6990E+ Clearwater Forest CPU showed a 38 percent reduction in runtime rack power, more than 60 percent higher performance per watt, and 30 percent higher overall performance compared with a dual-socket Xeon 6780E “Sierra Forest” system that also totals 288 cores. That improvement, on equal core counts, underscores how much the new E-core architecture plus 18A, Foveros, and packaging refinements contribute to real-world efficiency gains. For hyperscalers and telcos, the prospect is denser compute, lower energy bills, and fewer nodes to manage.
Core Count Strategy and the Competitive Landscape
Clearwater Forest is a key pillar in Intel’s broader core-count and platform strategy, which pairs E-core-only Xeon 6+ with upcoming P-core-focused families like Diamond Rapids. While Clearwater Forest emphasizes maximum core density for highly parallel workloads, Diamond Rapids is expected to scale to 256 P-cores per socket initially and up to 512 cores in denser variants with 16-channel memory, reinforcing Intel’s intent to blanket the data center stack. Against AMD’s high-core-count server CPUs, Intel is answering with both architectural specialization and process technology: E-core architecture for throughput and efficiency, P-cores for latency-sensitive tasks, and 18A plus future 14A and beyond as the manufacturing backbone. This two-pronged strategy aims to reduce the core-per-watt gap and reclaim socket share in general-purpose compute, edge deployments, and AI inference clusters where CPU utilization is rising alongside GPUs.
A Crucial Test of Intel’s Foundry Comeback and AI Ambitions
For Intel, Clearwater Forest Xeon 6+ is more than a product launch; it is a litmus test for the company’s manufacturing reset and foundry aspirations. Lip-Bu Tan has acknowledged that Intel’s prior manufacturing stumbles hurt talent recruitment and customer confidence, but a strengthened balance sheet and external backing have enabled renewed investment in process and packaging. Customers are already signaling interest in 18A and even the performance-enhanced 18AP variant, with some reportedly willing to provide prepayments for advanced substrate capacity. At the same time, Intel is betting that agentic AI and inference workloads will increase the strategic importance of CPUs, including highly parallel E-core designs like Clearwater Forest. If 18A-based Xeon 6+ delivers on yield, performance, and efficiency in volume, it could validate Intel’s roadmap toward 14A, 10A, and 7A and restore its credibility as both a leading Intel data center CPU supplier and a viable foundry partner.