Quick Verdict
A balanced Granite Rapids-SP SKU with strong per-core performance, large cache, and serious AI acceleration, best suited for memory-intensive and AI-augmented server workloads rather than cost-sensitive or purely throughput-oriented deployments.
Overview
Launch
2025
Status
LaunchedGeneration
Xeon 6 (Granite Rapids-SP)
Market
2S/4S/8S Server and High-End Workstation
The Intel Xeon 6728P is a 24-core, 48-thread server and workstation processor based on the Granite Rapids-SP platform, offering 144 MB of L3 cache, 8-channel DDR5-6400 memory, and 88 PCIe 5.0 lanes in a 210 W TDP envelope.
Intel’s Xeon 6728P sits in the middle of the Granite Rapids-SP stack with 24 P-cores, 48 threads, a 2.7 GHz base and 4.1 GHz max turbo, and 144 MB of shared L3 cache.
It supports 8-channel DDR5-6400 with up to 4 TB of memory per socket, 88 PCIe 5.0 lanes, and Intel’s latest AMX and on-die accelerators. That combination makes it a strong fit for virtualized infrastructure, in-memory databases, and AI inference workloads that benefit from high memory bandwidth and matrix math acceleration, though its 210 W TDP and premium pricing push it toward enterprise and professional use rather than budget homelab builds.
Specifications
Performance
Strong multi-threaded and memory-bandwidth-heavy productivity performance; benefits from cache, DDR5 channels, and AMX where applicable.
Excellent for high-VM-count and memory-intensive virtualization thanks to 8-channel DDR5 and large cache.
Not designed for gaming; can game in a pinch but lacks iGPU and is far from cost-effective for pure gaming builds.
Competitive performance-per-watt within Granite Rapids, but 210 W TDP is still substantial and requires robust cooling.
- •No integrated graphics; discrete GPU required.
- •High platform cost makes it unattractive for gaming versus consumer CPUs.
- •Adequate for casual gaming but not a target use case.
- •Intel AMX accelerates INT8 and BF16 matrix operations for deep learning inference.
- •Good fit for CPU-based LLM inference and small-to-medium model serving.
- •AI performance per core significantly better than pre-AMX Xeon generations.
Architecture
Intel 3 compute tiles + Intel 7 I/O tiles (commonly marketed as ~3 nm class)
Process Node
Granite Rapids-SP
Codename
24C / 48T
Core Config
144 MB
L3 Cache
210 W
TDP
Architecture Overview
Granite Rapids-SP is Intel’s 6th-generation Xeon Scalable server architecture, built on a tile-based design with Redwood Cove P-cores on Intel 3 compute tiles and Intel 7 I/O tiles, connected via embedded interconnects.
CPU Design
The Xeon 6728P uses one HCC compute tile with 24 Redwood Cove P-cores and 48 threads via Intel Hyper-Threading, along with 144 MB of shared L3 cache and integrated accelerators.
Memory Subsystem
An 8-channel DDR5 memory controller supports DDR5-6400 with ECC and up to 4 TB per socket, delivering high bandwidth for memory-bound workloads and CXL 2.0 memory expansion.
PCIe & I/O
88 PCIe 5.0 lanes from the CPU provide substantial I/O bandwidth for GPUs, NVMe, and networking, with flexibility for multi-socket topologies.
Overclocking
The multiplier is locked; Xeon 6728P is not designed for enthusiast overclocking and relies on Intel Turbo Boost and Speed Select Technology for performance tuning.
- Move from DDR4-2933 to DDR5-6400 with 8 channels vs 6 channels.
- L3 cache increased from ~36 MB to 144 MB.
- PCIe 3.0 to PCIe 5.0 with more lanes.
- Addition of AMX, QAT, DLB, DSA, IAA accelerators.
- Significant IPC and efficiency gains from Redwood Cove cores and Intel 3 process.
Key Highlights
- 24 high-performance Redwood Cove P-cores with strong IPC.
- 144 MB L3 cache benefits latency-sensitive workloads.
- 8-channel DDR5-6400 with up to 4 TB per socket.
- 88 PCIe 5.0 lanes for GPUs, NVMe, and networking.
- AMX and on-die accelerators (QAT, DLB, DSA, IAA) for AI and data processing.
- Supports 2S/4S/8S configurations for scalable enterprise deployments.
- High platform cost and 210 W TDP require robust cooling and power delivery.
- Locked multiplier; no overclocking headroom.
- No integrated graphics; must pair with discrete GPU or BMC.
- Memory and motherboard ecosystem are more expensive than consumer platforms.
- Less core-count density than higher-end Granite Rapids or EPYC 9004 SKUs.
History
The Xeon 6728P launched in February 2025 as part of Intel’s Xeon 6700P Granite Rapids-SP family, filling the mid-range of Intel’s new server platform. It arrived after the high-core-count Xeon 6900P Granite Rapids-AP parts and alongside the Xeon 6500P series, targeting customers who needed strong per-core performance and 8-channel DDR5 but not the maximum core counts or the highest TDPs. Built on Redwood Cove P-cores and Intel 3 compute tiles, the 6728P replaced older Cascade Lake and Ice Lake 24-core Xeons in many server designs, offering a substantial jump in memory bandwidth, cache, and AI capabilities through AMX and on-die accelerators.
Over time, it has become a common choice for enterprise servers and AI-focused workstations where 24 high-frequency cores, large cache, and 8-channel memory provide a good balance between cost and performance.
Improvements over Previous Generation
- Move from DDR4-2933 to DDR5-6400 with 8 channels vs 6 channels.
- L3 cache increased from ~36 MB to 144 MB.
- PCIe 3.0 to PCIe 5.0 with more lanes.
- Addition of AMX, QAT, DLB, DSA, IAA accelerators.
- Significant IPC and efficiency gains from Redwood Cove cores and Intel 3 process.
Alternatives & Competitors
Should You Buy It?
Recommended for the right buyer
Building or upgrading a 2S/4S server or workstation for AI inference, in-memory databases, or virtualization where 8-channel DDR5 and AMX are valuable.
Avoid if…
- Your workload is modest and fits cheaper Xeon E or older Xeon Scalable CPUs.
- You prioritize maximum cores per socket and can afford Xeon 6900P or EPYC 9004.
- You are building a pure gaming or light-use desktop.
Use Cases
Interesting Facts
Granite Rapids-SP uses a chiplet design with Intel 3 compute tiles and Intel 7 I/O tiles, a major shift from monolithic Xeon dies.
Redwood Cove P-cores first appeared in Meteor Lake client CPUs and were adapted for server use in Granite Rapids.
SPEC CPU2017 results published by Cisco and others show multi-socket Xeon 6728P systems delivering over 1100 SPECrate2017_int_base on integer workloads.
The 6728P supports Intel Speed Select Technology with configurable TDP profiles, allowing a 185 W mode for denser deployments.
Versus lists the 6728P as having a 3 nm process technology, reflecting Intel 3’s ~3 nm class marketing rather than a literal node size.
The 6728P can address up to 4 TB of DDR5 memory per socket when using 64 GB DIMMs.
Intel’s Xeon 6 launch emphasized up to 2x higher AI inference performance vs prior Xeon generations, heavily leveraging AMX.
The 6700P/6500P series is the first Xeon 6 family to support 8-socket configurations with the LGA4710 socket.
Granite Rapids-SP includes CXL 2.0 support for memory expansion and cache-coherent accelerators.
The 6728P’s 144 MB cache gives 6 MB per core, more than many competing 24-core server CPUs.
People Also Ask
Is Intel Xeon 6728P good for AI workloads?
Yes. It includes Intel AMX for INT8/BF16 matrix acceleration and 8-channel DDR5 for high memory bandwidth, making it well suited for CPU-based AI inference and small LLM hosting.
How much memory does the Xeon 6728P support?
Up to 4 TB of DDR5-6400 memory per socket across 8 channels, depending on DIMM capacity and population rules.
What socket does the Xeon 6728P use?
It uses the FCLGA4710 socket (LGA4710), part of Intel’s Birch Stream platform for Granite Rapids-SP processors.
Does the Xeon 6728P have integrated graphics?
No. Like other Xeon 6700P/6500P processors, it has no integrated GPU and requires a discrete graphics card or BMC for display output.
Can you overclock the Xeon 6728P?
No. The multiplier is locked; performance tuning relies on Intel Turbo Boost and Speed Select Technology profiles rather than overclocking.
What process node is the Xeon 6728P built on?
Its compute tiles use Intel’s Intel 3 process (roughly 3 nm class), with I/O tiles on Intel 7, though some third parties simplify this to “3 nm” or “5 nm” in marketing.
How many PCIe lanes does the Xeon 6728P have?
It provides 88 PCIe 5.0 lanes from the CPU, enabling high-bandwidth connectivity for GPUs, NVMe, and networking cards.
Is Xeon 6728P better than EPYC 9224?
It depends on workload. Xeon 6728P offers AMX and higher DDR5 speed per channel, while EPYC 9224 offers 12-channel DDR5 and more cores at similar TDP; for many server workloads they are competitive.
What is the TDP of Intel Xeon 6728P?
The default TDP is 210 W. Intel Speed Select Technology also defines a 185 W configuration for denser server deployments.
Which servers use the Xeon 6728P?
Multiple vendors including HPE, Cisco, Fujitsu, and Lenovo offer servers based on Xeon 6728P, such as HPE ProLiant DL380 Gen12 and Cisco UCS X410 M8.
Frequently Asked Questions
What generation is the Intel Xeon 6728P?
It belongs to Intel’s Xeon 6 (Granite Rapids-SP) generation, which is the 6th generation of Xeon Scalable server processors.
How many cores and threads does the Xeon 6728P have?
It has 24 cores and supports Intel Hyper-Threading for 48 threads.
What is the max turbo frequency of the Xeon 6728P?
The maximum single-core turbo frequency is 4.1 GHz, with an all-core turbo of 3.9 GHz under ideal conditions.
What memory speed does the Xeon 6728P support?
It supports DDR5-6400 (6400 MT/s) with ECC across 8 memory channels.
Does the Xeon 6728P support CXL?
Yes, Granite Rapids-SP supports CXL 2.0 Type 3 devices for memory expansion and coherent accelerators.
Is the Xeon 6728P unlocked for overclocking?
No. The processor has a locked multiplier and is not designed for overclocking; it relies on Intel Turbo Boost and Speed Select Technology instead.
What accelerators are included in the Xeon 6728P?
It includes Intel QuickAssist Technology (QAT), Dynamic Load Balancer (DLB), Data Streaming Accelerator (DSA), and In-Memory Analytics Accelerator (IAA), plus Intel AMX for AI workloads.
What is the maximum memory capacity supported by Xeon 6728P?
Up to 4 TB of DDR5 memory per socket when using 64 GB DIMMs, subject to population and vendor support.
Can Xeon 6728P be used in workstations?
Yes. It is used in high-end workstations for AI development, rendering, and simulation, though most buyers will prefer Xeon W-2400/3400 or Granite Rapids-WS for single-socket workstation use.
Is Xeon 6728P suitable for homelab use?
Only for very high-end homelabs. Its cost, TDP, and platform complexity make it overkill for most homelab builds; cheaper Xeon E or older Xeon Scalable CPUs are usually more practical.