Feex·CPU
Intel · Xeon Gold · Server

Intel® Xeon™ Gold 6266C

The Intel Xeon Gold 6266C is a server processor. It has 22 cores and 44 threads, a base clock of 3.00 GHz, a maximum boost of 3.40 GHz, 30 MB of L3 cache, a 205 W TDP and the FCLGA3647 socket.

Cores
22
Threads
44
Boost Clock
3.4 GHz
Base Clock
3.0 GHz
Socket
FCLGA3647
TDP
205 W
L3 Cache
30.3 MB
Multi-Core Performance
29,049
Core layout
PPPPPPPPPPPPPPPPPPPPPP
22 Performance 44 Threads
Notable capabilities:AVX-512Extended Page Tables (EPT)

Best for

Server / professional infrastructure

Overview

The Intel Xeon Gold 6266C is a server processor with 22 cores and 44 threads. Clocks run from 3.0 GHz base to 3.4 GHz boost. A 30.25-MB L3 cache backs the cores (1.4 MB per core). It supports DDR4 memory. It uses the FCLGA3647 socket. Rated TDP is 205 W. Notable platform capabilities: AVX-512, Extended Page Tables (EPT).

Performance

Overall CPU Performance computed
7,509
30% of reference
Reference ceiling 25,000
Multi-Core Performance PassMark rating
29,049
24% of reference
Reference ceiling 120,000
Single-Core Performance PassMark rating
1,941
35% of reference
Reference ceiling 5,500
Productivity Performance computed
21,599
13% of reference
Reference ceiling 160,000
Creator Performance computed
19,471
14% of reference
Reference ceiling 140,000
Engineering Performance computed
36,130
18% of reference
Reference ceiling 200,000
Gaming Performance computed
13,085
59% of reference
Reference ceiling 22,000
Performance per Core computed
1,320
6% of reference
Reference ceiling 21,053
Performance per Thread computed
660
6% of reference
Reference ceiling 10,527
Performance per Watt computed
142
7% of reference
Reference ceiling 2,000
Efficiency Index computed
524
13% of reference
Reference ceiling 4,000
Performance index computed
93
Intel Core i5-12400 = 100

The Intel Xeon Gold 6266C scores 1,941 in single-core performance and 29,049 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 7,509 for overall performance, 21,599 for productivity performance, 19,471 for creator performance, 36,130 for engineering performance and 13,085 for gaming performance. Its multi-core throughput works out to 1,320 per core, 660 per thread and 142 per watt. Its computed efficiency index is 524. Its performance index is 93, so its overall performance is 7% below the Intel Core i5-12400 (index 100). Each bar shows the score as a share of a reference ceiling, which is the larger of the 99th-percentile score across the Feex CPU database and a fixed baseline.

Workload sub-scores (integer math, floating point, compression, encryption, physics, SIMD, prime sieve and sorting) are not recorded for the Intel Xeon Gold 6266C.

How these scores are computed

Single-core and multi-core performance are PassMark CPU Mark single-thread and multi-thread ratings. Every other figure on this page's performance section is computed by Feex from those two ratings plus core count, thread count and TDP, so it is a derived value and not a separate benchmark run.

  • Overall performance is the geometric mean of the two ratings: the square root of single-core times multi-core.
  • Productivity performance is 0.65 times multi-core plus 1.4 times single-core.
  • Creator performance is 0.55 times multi-core plus 1.8 times single-core.
  • Engineering performance is multi-core times the smaller of 1.4 and (0.9 plus cores divided by 64).
  • Gaming performance is 3 times single-core plus 0.25 times multi-core.
  • Performance per core, per thread and per watt divide the multi-core rating by physical cores, logical threads and TDP in watts.
  • The efficiency index is the square root of single-core times multi-core, divided by the square root of TDP.
  • The performance index is overall performance divided by the overall performance of the Intel Core i5-12400 (8,069), times 100.

Core Configuration

Cores
22
Threads
44
Performance Cores
22
Threads per Core
2
Hybrid Architecture
No
Base Clock
3.0 GHz
Boost Clock
3.4 GHz

The Intel Xeon Gold 6266C has 22 physical cores and runs 44 logical threads. It does not use a hybrid performance and efficiency core layout. It runs 2 threads per core. It runs at a base clock of 3.00 GHz and boosts up to 3.40 GHz.

Architecture & Generation

Manufacturer
Intel
Family
Xeon Gold
Segment
Server
Generation
Not recorded
Architecture
Not recorded
Process Node
Not recorded
Lithography
Not recorded
Release Date
Not recorded

The Intel Xeon Gold 6266C is a server processor and belongs to the Intel Xeon Gold family.

Cache

L3 Cache
30.3 MB
Cache per Core
1.4 MB
Total Cache
30.3 MB

The Intel Xeon Gold 6266C has 30.3 MB of L3 cache. That adds up to about 30.3 MB of cache, or 1.38 MB per core. Feex has no recorded L1 cache size for this processor.

Memory Support

Max Memory
Not recorded
Memory Types
DDR4
DDR5 Support
No
DDR4 Support
Yes
LPDDR Support
No
Max Memory Speed
2,933

The Intel Xeon Gold 6266C supports DDR4 memory and runs memory at up to 2,933 MT/s. It does not support DDR5 and LPDDR memory.

Platform & Compatibility

Socket
FCLGA3647
PCIe Generation
Not recorded

The Intel Xeon Gold 6266C uses the FCLGA3647 socket.

Power & Thermals

TDP
205 W

The Intel Xeon Gold 6266C has a rated TDP of 205 W.

Platform Capabilities

Instruction sets, security, virtualization, AI acceleration and OS readiness. Features are listed as supported, explicitly not supported, or not recorded; a feature that is not recorded is not the same as unsupported.

Instruction Sets

7 supported
Supported
AES-NIAVX-512AVX2AVXFMASHA64-bit (x86-64)
Not supported
AMX
Not recorded
AVX-VNNICETCET-IBTCET-SSFMA3Hyper-Threading

Security and Reliability

4 supported
Supported
Execute Disable (NX)Boot GuardSGXTrusted Execution
Not recorded
AES-NIControl-flow Enforcement (CET)Hardware RNGHardware ShieldOS GuardOS Guard (SMAP)

Virtualization

3 supported
Supported
Extended Page Tables (EPT)VT-d (DMA Remapping)VT-x (Hardware Virtualization)
Not recorded
VT-x with EPTIOMMUSecond-Level Address TranslationUnrestricted Guest

OS Compatibility

1 supported
Supported
Windows 11 eligible

The Intel Xeon Gold 6266C supports AES-NI, AVX-512, AVX2, AVX, FMA, SHA and 64-bit (x86-64) among its instruction set features. It does not support AMX. Feex has no record for AVX-VNNI, CET, CET-IBT, CET-SS, FMA3 and Hyper-Threading, which is different from being unsupported.

The Intel Xeon Gold 6266C supports Execute Disable (NX), Boot Guard, SGX and Trusted Execution among its security features. Feex has no record for AES-NI, Control-flow Enforcement (CET), Hardware RNG, Hardware Shield, OS Guard and OS Guard (SMAP), which is different from being unsupported.

The Intel Xeon Gold 6266C supports Extended Page Tables (EPT), VT-d (DMA Remapping) and VT-x (Hardware Virtualization) among its virtualization features. Feex has no record for VT-x with EPT, IOMMU, Second-Level Address Translation and Unrestricted Guest, which is different from being unsupported.

Feex records the Intel Xeon Gold 6266C as Windows 11 eligible.

Naming & Aliases

Display Name
Intel® Xeon™ Gold 6266C
Normalized Name
Intel® Xeon™ Gold 6266C
Product line brand
Xeon

Real-world compute in the Feex fleet

No Feex fleet machines with the Intel Xeon Gold 6266C have reported compute telemetry yet, so real-world compute for this processor is not recorded.

How fleet compute is measured · Fleet compute leaderboard · JSON

Data Coverage

Feex has recorded 42% of the specifications it tracks for the Intel Xeon Gold 6266C. Values Feex does not hold are shown as "Not recorded" rather than estimated.

Not recorded: Core Configuration: Efficiency Cores, All-Core Boost and Unlocked Multiplier. Architecture & Generation: Codename, ISA Family and Market Status. Cache: L1 Cache (Total), L2 Cache (Total), L2 Cache (per Core) and L4 Cache. Memory Support: Memory Channels, Memory Bandwidth and ECC Memory. Graphics: Integrated Graphics, Graphics Model, Graphics Base Clock, Graphics Max Clock, Execution Units, Display Outputs and Max Video Memory. Platform & Compatibility: Package, Package Size and PCIe Lanes. Power & Thermals: Base Power, Maximum Turbo Power, Configurable TDP (Min), Configurable TDP (Max), Max Junction Temperature and Tcase. Physical & Manufacturing: Transistor Count, Die Size, Die Count, Foundry and Launch Price. Naming & Aliases: SKU, Model Number, Processor Number and Part Number.

Common questions

How many cores and threads does the Intel Xeon Gold 6266C have?

The Intel Xeon Gold 6266C has 22 cores and 44 threads.

What socket does the Intel Xeon Gold 6266C use?

The Intel Xeon Gold 6266C uses the FCLGA3647 socket.

What memory does the Intel Xeon Gold 6266C support?

The Intel Xeon Gold 6266C supports DDR4.

How fast does the Intel Xeon Gold 6266C run?

The Intel Xeon Gold 6266C can boost up to 3.4 GHz, with a 3.0 GHz base clock.

What is the TDP of the Intel Xeon Gold 6266C?

The Intel Xeon Gold 6266C has a TDP of 205 W.

How does the Intel Xeon Gold 6266C perform?

In the Feex normalized performance dataset, the Intel Xeon Gold 6266C scores 29,049 multi-core and 1,941 single-core.

What advanced capabilities does the Intel Xeon Gold 6266C support?

Notable platform capabilities reported for the Intel Xeon Gold 6266C include AVX-512, Extended Page Tables (EPT).

What is the Intel Xeon Gold 6266C best for?

Based on its specifications, the Intel Xeon Gold 6266C is well suited for Server / professional infrastructure.

How much cache does the Intel Xeon Gold 6266C have?

The Intel Xeon Gold 6266C has 30.25 MB of L3 cache.

How does the Intel Xeon Gold 6266C compare with the Intel Core i5-12400?

The Intel Xeon Gold 6266C has a computed performance index of 93, which is 7% below the Intel Core i5-12400 (index 100). The index is derived from the single-core and multi-core ratings.

Which features does the Intel Xeon Gold 6266C not support?

The Intel Xeon Gold 6266C does not support AMX.