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Intel Xeon 6788P specifications and in-depth review

Intel Xeon 6788P

Manufacturer: Intel

The Intel Xeon 6788P is a high-core-count processor designed for demanding enterprise workloads, sitting firmly in the enterprise CPU category. Built on a 3 nm semiconductor process, it features 86 physical cores running at a base speed of 2 GHz per core, with a turbo clock speed reaching up to 3.8 GHz via Turbo Boost version 2. The chip does not include integrated graphics, keeping its focus squarely on compute throughput for server and data center environments.

On the memory side, the Xeon 6788P supports DDR5 ECC memory across eight channels, with a maximum RAM speed of 6400 MHz, a bus transfer rate of 24 GT/s, and a ceiling of 4000 GB of addressable memory — figures suited to memory-intensive server applications. The processor ships with a substantial cache hierarchy: 9632 KB of L1, 172 MB of L2 at 2 MB per core, and 336 MB of L3 cache at roughly 3.91 MB per core. It supports PCIe 5.0, operates with a 64-bit architecture, includes NX bit and multithreading support, and carries a thermal design power rating of 350W with a maximum CPU temperature of 97 °C.

Pros
  • 86 cores and 172 threads provide substantial parallel processing capacity for multi-threaded server workloads
  • Support for up to 4000 GB of DDR5 ECC memory across eight channels accommodates extremely memory-intensive enterprise applications
  • A 336 MB L3 cache reduces memory latency for workloads that benefit from large amounts of fast-access on-chip storage
  • PCIe 5.0 support enables high-bandwidth connectivity for modern server components and accelerators
  • ECC memory support helps maintain data integrity by detecting and correcting memory errors at the hardware level
  • The broad instruction set coverage, including AES, AVX2, and FMA3, allows the processor to handle encryption, vectorized computation, and floating-point tasks natively
Cons
  • A 350W thermal design power demands robust server cooling infrastructure and increases overall platform power consumption
  • The absence of integrated graphics means a discrete solution is required for any display output, adding platform complexity
  • The clock multiplier is locked, removing any possibility of manual frequency tuning beyond factory specifications
  • A base clock speed of 2 GHz per core is relatively modest, which may limit single-threaded responsiveness in workloads that do not scale across many cores
Who is this for?

This processor is well-suited to large-scale enterprise server deployments and data center environments where workloads distribute effectively across many cores. Organizations running highly parallel workloads — such as database engines, virtualization platforms, or scientific computing jobs — will benefit from the 86-core, 172-thread configuration combined with the 336 MB L3 cache. The support for up to 4000 GB of DDR5 ECC memory across eight channels also makes it a strong fit for in-memory databases and applications that require both massive memory capacity and reliable error correction at the hardware level. Platforms requiring PCIe 5.0 connectivity for high-bandwidth accelerators or storage solutions will also find this chip a capable foundation.

Who is this NOT for?

This processor is not a practical choice for desktop workstations or any environment where single-threaded responsiveness is the primary requirement, as a 2 GHz base clock leaves limited headroom for latency-sensitive tasks that do not scale across cores. The 350W thermal design power makes it unsuitable for deployments lacking enterprise-grade cooling and power delivery infrastructure, as the thermal and electrical demands go well beyond what standard workstation or small-form-factor systems can support. Additionally, the absence of integrated graphics means it cannot serve in any context where display output without a discrete GPU is expected, ruling it out for environments that rely on headless-free operation through onboard video.

General info:

Thermal Design Power (TDP) 350W
semiconductor size 3 nm
PCI Express (PCIe) version 5
Supports 64-bit ✓
CPU temperature 97 °C
Has integrated graphics ✕

The Intel Xeon 6788P is built on a 3 nm semiconductor process and carries a Thermal Design Power rating of 350W, with a maximum operating temperature of 97 °C. It supports the PCIe 5.0 interface and is fully 64-bit compatible, making it suited for modern server platform configurations. The processor does not include integrated graphics, so a discrete solution would be required for any display output needs.

Performance:

CPU speed 86 x 2 GHz
CPU threads 172 threads
turbo clock speed 3.8GHz
L3 cache 336 MB
L1 cache 9632 KB
L2 cache 172 MB
L2 core 2 MB/core
clock multiplier 20
Has an unlocked multiplier ✕
L3 core 3.91 MB/core
Turbo Boost version 2

The Xeon 6788P offers 86 cores running at a base clock of 2 GHz each, totaling 172 threads for concurrent workload handling, with a turbo clock speed of 3.8 GHz via Turbo Boost version 2. The clock multiplier is set at 20 and is not unlocked, meaning frequency adjustments outside standard operation are not supported. Cache capacity is substantial across all levels: 9632 KB of L1, 172 MB of L2 at 2 MB per core, and a 336 MB L3 cache at approximately 3.91 MB per core — providing ample fast-access memory to feed the processor's high thread count.

Memory:

Supports ECC memory ✓
DDR memory version 5
RAM speed (max) 6400 MHz
maximum memory amount 4000GB
memory channels 8
bus transfer rate 24 GT/s

The Xeon 6788P supports DDR5 ECC memory across eight channels, enabling both error correction and broad memory bandwidth for server workloads. RAM speeds reach up to 6400 MHz, and the bus transfer rate is rated at 24 GT/s. The processor accommodates a maximum of 4000 GB of total memory, giving platforms built around this chip considerable headroom for memory-intensive applications.

Features:

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

The Xeon 6788P supports multithreading, allowing each physical core to handle multiple threads simultaneously for more efficient parallel processing. It includes the NX bit for hardware-level memory protection against certain classes of malicious code execution. The processor also comes with a broad set of instruction sets — MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2 — covering vectorized math, encryption acceleration, and floating-point operations across a range of workload types.

Benchmarks:

Final Verdict

The Intel Xeon 6788P is a processor built with a clear and specific purpose: to serve as a compute foundation for demanding enterprise and data center environments. Its 86-core, 172-thread configuration, paired with 336 MB of L3 cache and support for up to 4000 GB of DDR5 ECC memory, positions it as a capable platform for workloads that scale broadly across threads and depend on large, reliable memory capacity. The platform demands are real — a 350W TDP requires serious infrastructure investment, and the locked multiplier leaves no room for tuning — but for organizations operating at the scale this chip is designed for, those are expected trade-offs rather than surprises. For enterprise deployments built around parallel computation, virtualization, or memory-intensive services, the Xeon 6788P represents a well-specified option within its category.

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