TurboVS
Intel Xeon 6738P specifications and in-depth review

Intel Xeon 6738P

Manufacturer: Intel

The Intel Xeon 6738P is a high-core-count server processor designed for demanding enterprise workloads. Manufactured on a 3nm process node, it operates across 32 cores and 64 threads with a base clock of 2.9 GHz per core, scaling up to 4.2 GHz under Turbo Boost 2 conditions. It does not include integrated graphics, which is typical for this class of server-oriented silicon.

On the memory side, the Xeon 6738P supports eight-channel DDR5 at speeds up to 6400 MHz, with a maximum addressable capacity of 4000GB and mandatory ECC support for data integrity in server environments. Its cache hierarchy is substantial, with 3584 KB of L1, 64 MB of L2, and 144 MB of L3 cache in total. The chip communicates over PCIe 5.0 and carries a bus transfer rate of 24 GT/s, while its thermal ceiling sits at 102°C under a rated TDP of 270W. Supported instruction sets include AVX, AVX2, AES, FMA3, and others relevant to modern computational workloads.

Pros
  • 32 cores and 64 threads provide substantial parallel processing capacity for multi-threaded server workloads
  • Eight-channel DDR5 support with speeds up to 6400 MHz enables high memory bandwidth for data-intensive applications
  • Maximum memory capacity of 4000GB accommodates large in-memory datasets common in enterprise deployments
  • ECC memory support helps maintain data integrity by detecting and correcting memory errors at the hardware level
  • A 144 MB L3 cache reduces latency by keeping large working datasets closer to the execution cores
  • Broad instruction set support including AVX2, AES, and FMA3 allows efficient handling of vectorized and cryptographic workloads
Cons
  • A 270W TDP places significant demands on server cooling infrastructure and power delivery systems
  • The absence of integrated graphics requires a dedicated GPU or remote management solution for display output
  • The clock multiplier is locked, offering no flexibility for frequency adjustments outside factory settings
  • Base clock of 2.9 GHz is relatively modest, meaning single-threaded tasks rely heavily on Turbo Boost availability
Who is this for?

This processor is well-matched for large-scale enterprise server deployments where sustained multi-threaded throughput is a priority, such as virtualization hosts, database servers, and high-performance computing nodes. The eight-channel DDR5 configuration with support for up to 4000GB of ECC memory makes it particularly well-suited for memory-intensive workloads like in-memory analytics, large virtual machine pools, or cloud infrastructure. Organizations running workloads that benefit from hardware-accelerated encryption or vectorized computation will also find the included AES and AVX2 instruction set support directly relevant to their needs.

Who is this NOT for?

This processor is not a practical fit for desktop or workstation use cases, given the absence of integrated graphics and the 270W thermal envelope, which demands purpose-built server cooling and power infrastructure that standard consumer or small-form-factor systems cannot accommodate. It is equally unsuitable for tasks that rely heavily on single-threaded responsiveness, as the 2.9 GHz base clock and locked multiplier leave limited room for frequency headroom outside of Turbo Boost conditions. Environments with constrained power budgets or cooling limitations would also struggle to deploy this processor effectively.

General info:

Thermal Design Power (TDP) 270W
semiconductor size 3 nm
PCI Express (PCIe) version 5
Supports 64-bit ✓
CPU temperature 102 °C
Has integrated graphics ✕

The Intel Xeon 6738P is built on a 3nm semiconductor process and carries a Thermal Design Power of 270W, with a maximum operating temperature of 102°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, which is consistent with its enterprise-focused design.

Performance:

CPU speed 32 x 2.9 GHz
CPU threads 64 threads
turbo clock speed 4.2GHz
L3 cache 144 MB
L1 cache 3584 KB
L2 cache 64 MB
L2 core 2 MB/core
clock multiplier 29
Has an unlocked multiplier ✕
L3 core 4.5 MB/core
Turbo Boost version 2

The Xeon 6738P runs 32 cores at a base clock of 2.9 GHz across 64 threads, with Turbo Boost 2 scaling individual cores up to 4.2 GHz under suitable workloads. The clock multiplier is set at 29 and cannot be adjusted, as the processor does not feature an unlocked multiplier. Its cache layout spans 3584 KB of L1, 64 MB of L2 at 2 MB per core, and a 144 MB L3 cache at 4.5 MB per core, providing a substantial memory buffer close to the execution units to help sustain throughput across multi-threaded workloads.

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 6738P supports DDR5 memory across eight channels, with a maximum rated speed of 6400 MHz and a bus transfer rate of 24 GT/s. It can address up to 4000GB of total system memory, providing substantial headroom for memory-intensive server workloads. ECC memory support is included, enabling the platform to detect and correct in-memory errors for improved data reliability in enterprise environments.

Features:

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

The Xeon 6738P supports multithreading, allowing each physical core to handle two threads simultaneously for improved throughput under parallel workloads. It also includes the NX bit, a hardware-level feature that helps prevent certain classes of malicious code execution by marking memory regions as non-executable. The processor supports a broad set of instruction sets including AVX, AVX2, AES, FMA3, F16C, MMX, SSE 4.1, and SSE 4.2, covering a range of operations from vectorized floating-point computation to hardware-accelerated encryption.

Benchmarks:

Final Verdict

The Intel Xeon 6738P is a purpose-built enterprise processor that makes a compelling case for itself within large-scale server environments where parallel throughput and memory capacity are critical. Its 32-core, 64-thread configuration paired with eight-channel DDR5 support and a 144 MB L3 cache forms a cohesive platform for virtualization, in-memory analytics, and compute-intensive workloads that demand both bandwidth and data locality. The 270W thermal footprint and absence of integrated graphics do narrow its deployment scope to infrastructure with adequate power and cooling resources, but within that context, the Xeon 6738P delivers a well-rounded specification set that aligns closely with the demands of modern enterprise computing. Organizations investing in purpose-built server hardware will find it a technically solid fit for the workloads it was clearly designed to serve.

Popular Comparisons

Intel Xeon 6738P
Intel Xeon 6738P
VS
Intel Xeon 6737P
Intel Xeon 6737P