Clearwater Forest Xeon 6+ Reaches Full Production
Intel has confirmed that its Intel Xeon 6+ Clearwater processors are now in full mass production, marking a major milestone in the company’s data center roadmap. Built on the advanced 18A process node, Clearwater Forest targets 6G infrastructure and Edge AI workloads, positioning Intel squarely in the next wave of high-density, power‑efficient compute. The company disclosed the status during a oneAPI Toolkit briefing, noting that the upcoming oneAPI 2026.0 release will offer full support for Clearwater Forest alongside future platforms such as Crescent Island, Nova Lake, and Diamond Rapids. With launch expected later this year, Intel is moving quickly to translate its manufacturing progress into deployable silicon for cloud and telecom operators. The move also signals growing confidence in Intel’s foundry capabilities, as 18A transitions from a roadmap promise to a production technology underpinning real data center processors.
288 Darkmont E‑Cores and Massive On‑Package Cache
At the heart of Intel Xeon 6+ Clearwater is the new Darkmont E-core architecture, designed to maximize throughput and efficiency for massively parallel workloads. Each Clearwater Forest CPU can integrate up to 288 E-cores arranged across 12 compute chiplets, backed by 576 MB of on‑package L3 cache and 288 MB of L2 cache. This configuration is tailored for highly threaded services such as microservices, telco workloads, and cloud-native applications that benefit from large core counts and fast access to shared data. The platform scales up to a 450W TDP and uses the LGA 7529 socket in both single‑socket and dual‑socket configurations, giving system vendors flexibility in server designs. By pushing core density and cache capacity this far, Intel is aiming to deliver data center processors that can consolidate more workloads per rack while improving performance per watt compared to previous Xeon generations.
18A Process Node Showcases Intel’s Advanced Manufacturing
Clearwater Forest is a showcase for Intel’s 18A process node and a cluster of new manufacturing technologies. The chips combine RibbonFET transistors and PowerVia backside power delivery with advanced packaging methods such as Foveros Direct 3D stacking and EMIB 2.5D interconnects. Together, these innovations are intended to reduce power loss, shorten signal paths, and increase integration density, enabling more cores and cache within the same power envelope. Clearwater Forest sits alongside client products like Panther Lake Core Ultra Series 3 and Wildcat Lake Core Series 3 as part of Intel’s broader 18A rollout, but it is the flagship for the data center segment. By bringing 18A into full production on a complex, high‑core‑count server CPU, Intel is signaling that its foundry evolution is not theoretical: it is delivering real enterprise CPU architecture advances that cloud providers and enterprises can plan around.
Platform Features and Performance Uplift for Data Centers
Beyond core counts, the Intel Xeon 6+ Clearwater platform is built to feed data‑hungry workloads. It supports up to 12‑channel DDR5 memory with speeds reaching 8000 MT/s, along with up to six UPI 2.0 links delivering 24 GT/s per lane for high‑bandwidth socket‑to‑socket communication. For I/O and accelerators, Clearwater provides up to 96 PCIe 5.0 lanes and 64 CXL 2.0 lanes, enabling dense attachment of GPUs, DPUs, and storage. Early testing by Ericsson with a Xeon 6990E+ Clearwater chip shows a single‑socket configuration with 288 cores reducing runtime rack power by 38%, delivering more than 60% better performance per watt, and 30% higher overall performance versus a dual‑socket Xeon 6780E Sierra Forest platform with the same core count. These gains highlight Clearwater’s value proposition: consolidate servers, cut power, and still increase throughput for modern cloud and telecom environments.
Competitive Positioning and the Road to Diamond Rapids
Clearwater Forest sits within a broader Xeon roadmap that blends efficiency‑focused E-cores with performance‑oriented P-cores. While Clearwater targets dense, energy‑efficient data center processors, Intel is also preparing Diamond Rapids P-core CPUs, which are expected to offer 256 cores in initial configurations and scale to 512 cores with 16‑channel memory in denser variants. Dell has already announced its PowerEdge R9810 server platform with Diamond Rapids, highlighting doubled memory bandwidth and up to 50% more CPU cores compared with previous generations, with availability targeted for 2027. Together, Clearwater and Diamond Rapids illustrate Intel’s dual‑track strategy: use E-core heavy designs like Intel Xeon 6+ Clearwater for highly parallel workloads, while P-core heavy systems tackle latency‑sensitive, high‑single‑thread tasks. As Clearwater Forest launches this year, it will give Intel a more competitive portfolio in enterprise CPU architecture, directly addressing cloud, telecom, and high‑performance computing requirements.