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Intel Xeon 6776P specifications and in-depth review

Intel Xeon 6776P

Manufacturer: Intel

The Intel Xeon 6776P is a high-core-count processor designed for demanding enterprise workloads, offering 64 physical cores with 128 threads through multithreading support. Built on a 3 nm semiconductor process, it operates at a base clock speed of 2.3 GHz across all cores, with a turbo clock speed reaching 3.9 GHz under supported conditions.

From a technical standpoint, the Xeon 6776P carries a 336 MB L3 cache — equating to 5.25 MB per core — and supports PCIe 5.0 connectivity alongside DDR5 memory at speeds up to 8000 MHz across eight memory channels, with a maximum addressable memory capacity of 4000 GB. The processor also supports ECC memory, includes NX bit protection, and is compatible with instruction set extensions including AVX2, FMA3, AES, and SSE 4.2, all within a thermal envelope of 350W and a maximum operating temperature of 100 °C.

Pros
  • 64 cores and 128 threads provide substantial parallel processing capacity for multi-threaded enterprise workloads
  • 336 MB of L3 cache with 5.25 MB per core helps sustain throughput across all cores with reduced memory latency
  • Supports up to 4000 GB of DDR5 memory across 8 channels, accommodating memory-demanding server configurations
  • ECC memory support helps maintain data integrity by detecting and correcting memory errors during operation
  • Unlocked clock multiplier allows for clock speed adjustments within supported platform configurations
  • Broad instruction set support including AVX2, FMA3, and AES enables hardware-accelerated vectorized and cryptographic operations
Cons
  • 350W TDP places significant demands on cooling infrastructure and power delivery within server environments
  • No integrated graphics means a discrete or external graphics solution is required for display output
  • Turbo clock speed of 3.9 GHz is relatively modest given the 2.3 GHz base, limiting single-threaded frequency headroom
  • High maximum memory capacity and 8-channel configuration require compatible server platforms that may have complex setup requirements
Who is this for?

This processor is well-matched for large-scale enterprise environments that depend on high core and thread counts to handle deeply parallel workloads such as virtualization, containerized infrastructure, and database processing. The support for up to 4000 GB of DDR5 ECC memory across eight channels makes it particularly relevant for memory-intensive server applications where both capacity and data integrity are critical. Organizations running workloads that benefit from AVX2, FMA3, or AES instruction acceleration — such as scientific computing, encryption-heavy services, or large-scale data analytics — will find the processor's feature set directly applicable to their needs.

Who is this NOT for?

This processor is not suited for environments where power consumption and thermal management are constrained, as the 350W TDP requires robust cooling and power delivery infrastructure that smaller deployments may not have. It is also a poor fit for any workload that places a premium on single-threaded clock speed, since the modest gap between the 2.3 GHz base and 3.9 GHz turbo frequency limits responsiveness in tasks that do not scale across many cores. Additionally, any setup requiring integrated display output — such as lightweight embedded systems or configurations without a dedicated GPU — would be incompatible, as this processor includes no integrated graphics capability.

General info:

Thermal Design Power (TDP) 350W
semiconductor size 3 nm
PCI Express (PCIe) version 5
Supports 64-bit ✓
CPU temperature 100 °C
Has integrated graphics ✕

The Intel Xeon 6776P carries a Thermal Design Power (TDP) of 350W and a maximum operating temperature of 100 °C, reflecting the thermal demands of a processor at this scale. It is manufactured on a 3 nm semiconductor process and supports the PCIe 5.0 interface for high-bandwidth connectivity. The processor is fully 64-bit compatible and does not include integrated graphics, making it suited for deployments that rely on discrete or external graphics solutions.

Performance:

CPU speed 64 x 2.3 GHz
CPU threads 128 threads
turbo clock speed 3.9GHz
L3 cache 336 MB
clock multiplier 23
Has an unlocked multiplier ✓
L3 core 5.25 MB/core
Turbo Boost version 2

The processor runs 64 cores at a base speed of 2.3 GHz, delivering a total of 128 threads through multithreading, with a turbo clock speed of 3.9 GHz supported via Turbo Boost version 2. It features a 336 MB L3 cache, translating to 5.25 MB per core, which helps sustain throughput across its many cores. The clock multiplier is set at 23, and the processor ships with an unlocked multiplier, allowing for clock speed adjustments within supported configurations.

Memory:

Supports ECC memory ✓
DDR memory version 5
RAM speed (max) 8000 MHz
maximum memory amount 4000GB
memory channels 8

The Intel Xeon 6776P supports DDR5 memory at speeds of up to 8000 MHz across eight memory channels, enabling substantial memory bandwidth for data-intensive workloads. It accommodates a maximum installed memory capacity of 4000 GB, making it well-suited for configurations that demand large memory footprints. ECC memory support is also included, providing hardware-level error detection and correction to help maintain data integrity during operation.

Features:

uses multithreading ✓
instruction sets MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, SSE 4.2
Has NX bit ✓

The processor supports multithreading, allowing each physical core to handle multiple threads simultaneously for improved throughput under parallel workloads. It includes a broad set of instruction set extensions — MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2 — covering vectorized math, encryption acceleration, and floating-point operations. Additionally, NX bit support is present, enabling hardware-enforced memory protection that helps prevent certain classes of malicious code execution.

Benchmarks:

Final Verdict

The Intel Xeon 6776P is a processor built around one clear purpose: handling the demands of large-scale enterprise infrastructure at scale. With 64 cores, 128 threads, and 336 MB of L3 cache backed by DDR5 ECC memory support reaching up to 4000 GB, it offers a technically dense foundation for virtualization, data-intensive workloads, and parallel computing environments. Its thermal and power requirements mean it belongs in purpose-built server deployments rather than constrained settings, and its limited single-threaded frequency ceiling is a reasonable trade-off given its architectural focus on breadth over peak speed. For organizations operating environments that match those demands, the Xeon 6776P represents a well-specified option within the enterprise CPU category.

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