Intel Xeon 6766E
Expert rating8.6 / 10
- Brand:
- Intel
- Form Factor:
- Server & Enthusiast
- CPU Socket:
- LGA 4710
- Core/Thread Count:
- 144C/144T
- TDP:
- 400W
- Core Type:
- Efficient
- CPU Series:
- Xeon 6
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Manufacturer: Intel Last updated: 2026-09-11
Intel Xeon 6766E Review
Intel Xeon 6766E 144-core 144-thread server processor, 1.9GHz base / 3.1GHz boost, 400W TDP, 180MB L3 cache, Sierra Rapids, LGA 4710 socket
The Intel Xeon 6766E is a core-dense Xeon 6 E-core processor built for horizontally-scaled cloud-native and throughput-bound workloads. Built on Intel's Sierra Rapids architecture with efficient (E-core, no Hyper-Threading) and rated for a 400W TDP, it pairs 144 cores and 144 threads with a 1.9GHz base clock that boosts up to 3.1GHz, backed by 180MB of L3 cache.
Performance and Architecture
With 144 cores and 144 threads, the Intel Xeon 6766E is built on Intel's Sierra Rapids generation, using efficient (E-core, no Hyper-Threading) designed for maximum core density per rack. Its 1.9GHz base clock boosts to 3.1GHz, and the 180MB L3 cache helps keep large working sets in cache for throughput-bound cloud services.
Platform and Memory
The Intel Xeon 6766E uses the LGA 4710 platform in a 1S/2S configuration, supporting 8-channel memory up to 2TB (8-channel DDR5-6400). This represents AMD-style core-density competition, trading per-core clock speed and Hyper-Threading for raw core count per socket, giving system builders a clear point in Intel's current Xeon 6 stack to match against specific rack power and density budgets.
Comparison to Alternatives
Within the Xeon 6 lineup in this catalog, the Intel Xeon 6766E sits at the 144-core tier, trading Hyper-Threading for core density against the P-core parts at similar core counts. Against AMD's EPYC processors in this catalog, Intel's Xeon 6 competes primarily on raw core density and rack-level efficiency. It fits hyperscale and cloud-native fleets optimizing for cores-per-rack.
Specifications
Identity
| Product Line | Xeon |
|---|---|
| Model Number | 6766E |
| Codename | Sierra Rapids |
| Release Year | 2024 |
Segment and platform
| Market Segment | Server |
|---|---|
| Microarchitecture | Sierra Rapids |
| Socket | Other |
| Socket | 1S/2S |
| Socket Status | Current |
| Process Node | 3 nm |
Core configuration
| Total Cores | 144 |
|---|---|
| Performance Cores | 0 |
| Efficiency Cores | 144 |
| Total Threads | 144 |
| SMT Enabled | No |
Clock speeds
| P-Core Base Clock | 1.9 GHz |
|---|---|
| P-Core Boost Clock | 3.1 GHz |
| Unlocked Multiplier | No |
Cache
| L3 Cache | 180 MB |
|---|
Power and thermal
| Base Power | 400 W |
|---|
Memory
| Memory Type | DDR5 |
|---|---|
| Memory Channels | 8 |
| Max Memory Capacity | 2048 GB (8-channel DDR5-6400) |
| Max Memory Capacity | 2048 GB |
| ECC Support | Yes |
Graphics and AI
| Integrated Graphics | No |
|---|---|
| Copilot Plus Certified | No |
Expansion
| PCIe Generation | PCIe 5.0 |
|---|
| Form Factor | Server & Enthusiast |
|---|---|
| TDP | 400 W |
Measured results
SPEC CPU 2017
Best published result on spec.org as of 23 Sept 2026.
| SPECrate® 2017 Integer (base) | 665 |
Cores 144 · Tested in meta brain NF3180G8 (Intel Xeon 6766E) · Published by IEIT Systems Co., Ltd., Jan-2025
Full disclosure on spec.org| SPECrate® 2017 Floating Point (base) | 579 |
Cores 144 · Tested in meta brain NF3180G8 (Intel Xeon 6766E) · Published by IEIT Systems Co., Ltd., Jan-2025
Full disclosure on spec.org| SPECrate® 2017 Integer (base) | 1,350 |
Cores 288 · Tested in ASUS RS720-E12-RS8G (1.90 GHz, Intel Xeon 6766E) · Published by ASUSTeK Computer Inc., Jan-2026
Full disclosure on spec.org| SPECrate® 2017 Floating Point (base) | 1,140 |
Cores 288 · Tested in ASUS RS720-E12-RS8G (1.90 GHz, Intel Xeon 6766E) · Published by ASUSTeK Computer Inc., Jan-2026
Full disclosure on spec.orgSPEC®, SPECrate® and SPECspeed® are registered trademarks of the Standard Performance Evaluation Corporation. Copied by permission of the Standard Performance Evaluation Corporation (SPEC). Results retrieved from www.spec.org on 23 Sept 2026.
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating8.6 / 10
The Intel Xeon 6766E trades per-core performance for AMD-style core density, a strong pick for horizontally-scaled cloud-native fleets.
Best for
- Cloud-native microservices
- Horizontally-scaled web tiers
- Container-dense hosts
Not for
- Latency-sensitive single-threaded workloads
- Legacy per-core-licensed software
- Small deployments
FAQs
What are the key specifications of the Intel Xeon 6766E?
The Intel Xeon 6766E is a processor from Intel. Key specs: Cores 144, Threads 144, Base Clock 1.9 GHz, Boost Clock 3.1 GHz, L3 Cache 180.
Will the Intel Xeon 6766E work with my current setup?
The Intel Xeon 6766E lists Socket is LGA 4710. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the Intel Xeon 6766E best suited to?
It suits cloud-native microservices, horizontally-scaled web tiers, container-dense hosts.
What are the drawbacks of the Intel Xeon 6766E?
It is a poor fit for latency-sensitive single-threaded workloads, legacy per-core-licensed software, small deployments.