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Intel Xeon 6736P specifications and in-depth review

Intel Xeon 6736P

Manufacturer: Intel

The Intel Xeon 6736P is a server-grade processor designed for demanding enterprise workloads. Built on a 3 nm semiconductor process, it features 36 cores and 72 threads, with a base clock speed of 2 GHz per core and a turbo frequency that reaches 4.1 GHz. The chip supports 64-bit computing and includes multithreading, making it suited for highly parallel processing environments.

On the memory side, the Xeon 6736P supports DDR5 at up to 6400 MHz across eight channels, with a maximum capacity of 4000 GB and a peak bandwidth of 409.6 GB/s. ECC memory support is included, along with a 24 GT/s bus transfer rate and PCIe 5.0 connectivity. The processor carries a substantial cache hierarchy — 4032 KB of L1, 72 MB of L2, and 144 MB of L3 cache — and operates within a thermal envelope of 205W with a maximum junction temperature of 98°C. Instruction set support includes AVX, AVX2, AES, FMA3, and SSE 4.1/4.2, among others. Its PassMark multi-core score stands at 125,444, with a single-core result of 3,445.

Pros
  • Supports up to 4000 GB of DDR5 ECC memory across eight channels, offering substantial capacity and reliability for enterprise server deployments
  • The 144 MB L3 cache and 72 MB L2 cache provide a large on-chip memory pool that helps sustain throughput across 36 cores and 72 threads
  • PCIe 5.0 support enables high-bandwidth connectivity for storage and networking components
  • A maximum memory bandwidth of 409.6 GB/s at DDR5-6400 MHz suits workloads that depend on moving large volumes of data quickly
  • Includes a wide range of instruction sets — AVX2, AES, FMA3, and others — covering vectorized computation and hardware-accelerated encryption
  • NX bit support adds a layer of hardware-based memory protection relevant to security-conscious enterprise environments
Cons
  • A 205W TDP results in significant heat output, requiring robust server cooling infrastructure
  • No integrated graphics means a discrete GPU or remote management card is necessary for any display output
  • The clock multiplier is locked, offering no flexibility for frequency tuning
  • A base clock of 2 GHz per core is relatively modest for single-threaded tasks, with turbo headroom limited to 4.1 GHz
Who is this for?

The Xeon 6736P is well-matched to environments that demand sustained multi-threaded throughput, such as large-scale virtualization platforms, in-memory databases, and data analytics workloads. Its support for up to 4000 GB of ECC DDR5 memory across eight channels makes it a strong fit for memory-intensive enterprise server deployments where both capacity and data integrity are critical. Organizations running workloads that benefit from AVX2, AES, and FMA3 instruction sets — including scientific computing and encrypted data processing — will also find its feature set directly applicable.

Who is this NOT for?

This processor is not suited to environments where low power consumption or thermal efficiency is a priority, as its 205W TDP demands substantial cooling infrastructure that may not be available in compact or edge deployments. The absence of integrated graphics makes it entirely unsuitable for any scenario requiring direct display output without a discrete GPU or dedicated management card. Additionally, workloads that rely heavily on single-threaded performance may find the 2 GHz base clock limiting, since the turbo headroom is fixed and the locked clock multiplier leaves no room for manual frequency tuning.

General info:

Thermal Design Power (TDP) 205W
semiconductor size 3 nm
PCI Express (PCIe) version 5
Supports 64-bit ✓
CPU temperature 98 °C
Has integrated graphics ✕

The Intel Xeon 6736P is manufactured on a 3 nm semiconductor process and carries a Thermal Design Power of 205W, with a maximum operating temperature of 98°C. It supports 64-bit computing and connects via PCIe 5.0, enabling high-bandwidth peripheral communication. The processor does not include integrated graphics, so a discrete GPU is required for display output.

Performance:

CPU speed 36 x 2 GHz
CPU threads 72 threads
turbo clock speed 4.1GHz
L3 cache 144 MB
L1 cache 4032 KB
L2 cache 72 MB
L2 core 2 MB/core
clock multiplier 20
Has an unlocked multiplier ✕
L3 core 4 MB/core
Turbo Boost version 2

The processor features 36 cores running at a base speed of 2 GHz each, with 72 threads in total and a turbo clock speed of 4.1 GHz via Turbo Boost version 2. The clock multiplier is set at 20 and is not unlocked, meaning frequency adjustments are fixed. Cache is organized across three levels: 4032 KB of L1, 72 MB of L2 at 2 MB per core, and a 144 MB L3 cache at 4 MB per core — providing a substantial on-chip memory hierarchy to support throughput-heavy workloads.

Memory:

Supports ECC memory ✓
maximum memory bandwidth 409.6 GB/s
DDR memory version 5
RAM speed (max) 6400 MHz
maximum memory amount 4000GB
memory channels 8
bus transfer rate 24 GT/s

The Xeon 6736P supports DDR5 memory at speeds up to 6400 MHz across eight channels, delivering a maximum bandwidth of 409.6 GB/s and a bus transfer rate of 24 GT/s. It accommodates up to 4000 GB of total memory, making it well-suited for memory-intensive server configurations. ECC memory support is included, providing error detection and correction capabilities important for maintaining data integrity 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 6736P supports multithreading, allowing each core to handle multiple threads simultaneously for improved throughput under parallel workloads. It includes the NX bit for hardware-level memory protection against certain classes of malicious code execution. The processor also carries a broad set of instruction sets — MMX, F16C, FMA3, AES, AVX, AVX2, SSE 4.1, and SSE 4.2 — covering vectorized math, hardware-accelerated encryption, and floating-point operations across a range of application types.

Benchmarks:

PassMark result 125444
PassMark result (single) 3445

In PassMark testing, the Xeon 6736P achieves a multi-core score of 125,444, reflecting its capacity for handling heavily threaded workloads across its 36 cores. Its single-core PassMark result of 3,445 indicates the per-core processing capability available for tasks that rely on sequential execution rather than parallelism.

Final Verdict

The Intel Xeon 6736P is a processor built squarely for enterprise-scale server workloads, combining 36 cores, 72 threads, and up to 4000 GB of ECC DDR5 memory across eight channels into a platform that prioritizes throughput, capacity, and data integrity above all else. Its broad instruction set support, large cache hierarchy, and PCIe 5.0 connectivity reinforce its position as a chip designed for demanding, parallel environments rather than general-purpose or low-overhead use. Organizations deploying it in the right infrastructure — with adequate cooling and discrete GPU support where needed — will find it a well-specified option for virtualization, in-memory computing, and data-intensive enterprise applications.

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