Core i5-6400

Details and Benchmarks for Intel Core i5-6400

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Benchmark Results

Combined benchmark scores based on multiple data points, giving a quick overview of this processor's performance.

Overall Score

Overall score for Core i5-6400 based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,988 Rank: 881
Rank Name Score Visual
877 Ryzen Embedded V1605B 4,993
+0.1%
878 Core i5-4570S 4,992
+0.1%
879 Xeon D-1528 4,990
+0%
880 Pentium Gold G5420 4,990
+0%
881 Core i5-6400 4,988
882 Core i7-6700T 4,987
+-0%
883 Core i5-1030NG7 4,987
+-0%
884 Core i5-4460 4,986
+-0%
885 Core i7-4710MQ 4,986
+-0%
886 FX-8320E 4,986
+-0%

View full ranking →

Multicore Score

Multicore performance score for Core i5-6400 based on multi-threaded benchmark results.

4,573 Rank: 1130
Rank Name Score Visual
1126 Ryzen 3 2200GE 4,576
+0.1%
1127 Athlon 240GE 4,576
+0.1%
1128 A10-7890K 4,576
+0.1%
1129 Core i7-7560U 4,573
+0%
1130 Core i5-6400 4,573
1131 Core i3-2348M 4,572
+-0%
1132 Core i5-6400T 4,571
+-0%
1133 Atom x5-Z8300 4,570
-0.1%
1134 Pentium G4500T 4,569
-0.1%
1135 Xeon E5530 4,569
-0.1%

View full ranking →

Singlecore Score

Single-core performance score for Core i5-6400 based on single-threaded benchmark results.

5,264 Rank: 759
Rank Name Score Visual
755 Xeon E3-1280 v3 5,267
+0.1%
756 Xeon E5-2699A v4 5,266
+0%
757 Core i7-4810MQ 5,265
+0%
758 Core i7-4980HQ 5,265
+0%
759 Core i5-6400 5,264
760 Ryzen 5 4600H 5,263
+-0%
761 Xeon D-2183IT 5,261
-0.1%
762 EPYC 7232P 5,260
-0.1%
763 Pentium G4400 5,258
-0.1%
764 Core i7-5700HQ 5,258
-0.1%

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Workload Scores

Performance scores grouped by workload type, normalized and aggregated from multiple raw benchmark results.

Number Crunching

Aggregated score for Core i5-6400 based on integer math, floating point math, and prime number computation benchmarks.

4,626 Rank: 901
Rank Name Score Visual
897 Ryzen 3 PRO 2200GE 4,627
+0%
898 Core i3-8100T 4,627
+0%
899 Core i7-4702MQ 4,627
+0%
900 Core i5-7500T 4,626
+0%
901 Core i5-6400 4,626
902 Core i5-4460S 4,626
+0%
903 Core i7-3615QM 4,626
+0%
904 Xeon L5640 4,626
+0%
905 Core i7-6822EQ 4,625
+-0%
906 Atom C3758 4,625
+-0%

View full ranking →

Data Processing

Aggregated score for Core i5-6400 based on data encryption, data compression, and string sorting benchmarks.

4,594 Rank: 914
Rank Name Score Visual
910 Core i5-3550 4,596
+0%
911 Core i5-4570S 4,596
+0%
912 Xeon D-1527 4,595
+0%
913 Core i5-6440EQ 4,594
+0%
914 Core i5-6400 4,594
915 Core i3-8300T 4,594
+0%
916 Core i5-1030NG7 4,594
+0%
917 Xeon E5-1607 v4 4,593
+-0%
918 Core i5-7500T 4,593
+-0%
919 Core i3-8100T 4,593
+-0%

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Physics & Compute

Aggregated score for Core i5-6400 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,686 Rank: 764
Rank Name Score Visual
760 Core i5-6600T 4,687
+0%
761 Core i7-4820K 4,687
+0%
762 Xeon E5-2430 v2 4,687
+0%
763 Core i5-7500T 4,686
+0%
764 Core i5-6400 4,686
765 Core i5-4670 4,686
+0%
766 Ryzen 5 PRO 1500 4,685
+-0%
767 Xeon E5-2637 v2 4,685
+-0%
768 Ryzen 5 2500X 4,684
+-0%
769 Core i7-4900MQ 4,684
+-0%

View full ranking →

Core i5-6400 Details

Built on Intel's Skylake microarchitecture and fabricated on a 14 nm process, the Core i5-6400 represents a solid mid-range desktop CPU from 2015. As of early 2026, this processor is now over a decade old, placing it firmly in the legacy category. Despite its age, it remains a capable performer for basic productivity and light multimedia tasks, thanks to its efficient design and balanced feature set. With a base clock of 2.7 GHz and a maximum turbo frequency of 3.3 GHz, the i5-6400 delivers consistent performance across single-threaded and lightly threaded workloads.

The processor features four cores and four threads, with no support for simultaneous multithreading. It includes 6 MB of L3 cache and 1 MB of L2 cache, ensuring fast access to frequently used data. The integrated HD Graphics 530 GPU provides basic display output, capable of driving up to three monitors and operating at a base frequency of 350 MHz, with a maximum dynamic frequency of 950 MHz. This makes it suitable for office applications and light gaming, though it falls short of modern integrated graphics solutions.

The Core i5-6400 operates within a 65 W TDP and uses the LGA-1151 socket, requiring a compatible Intel 100 or 200 Series chipset. It supports dual-channel DDR4-2133 and DDR3L-1600 memory, with a maximum memory capacity of 64 GB and a memory bandwidth of 34.1 GB/s. The processor supports a range of Intel technologies, including AVX, AVX2, AES-NI, and Intel VT-x, enhancing performance in encryption, virtualization, and multimedia applications.

In benchmark testing, the Core i5-6400 achieves a single-core score of 5264, ranking #759 of 2060, and a multicore score of 4573, placing it at #1129 of 2060. Its overall score of 4988 ranks it #881 of 2060, indicating that while it holds its own against older processors, it lags significantly behind modern CPUs. The single-core performance is particularly strong, outperforming several recent Intel and AMD models in the same category.

Given its age and performance level, the Core i5-6400 is best suited for budget systems, office environments, or as a replacement in older builds. While it no longer competes with today’s high-end processors, it remains a reliable option for users who prioritize cost-effectiveness and energy efficiency over cutting-edge performance.
Frequently Compared

AMD Ryzen 5 PRO 3500U 37 views

Intel Xeon Silver 4114 35 views

Intel Core i7-7600U 33 views

Intel Xeon Platinum 8270 32 views

Intel Xeon Silver 4116T 31 views

Intel Xeon Silver 4110 30 views

Intel Xeon Silver 4210 30 views

AMD Ryzen 3 PRO 2200GE 29 views

AMD Ryzen 9 PRO 3900 29 views

Intel Xeon Silver 4112 29 views

Intel Core i5-6400

Main Specifications

Designer: Intel
Name: Core i5-6400
Family: Core
Series: i5-6000
Model Number: i5-6400
Cores: 4
Threads: 4
Base Frequency: 2700 MHz
Turbo Frequency (1 core): 3300 MHz
Turbo Frequency (2 cores): 3300 MHz
Turbo Frequency (3 cores): 3200 MHz
Turbo Frequency (4 cores): 3100 MHz
Clock Multiplier: 27x (locked)
Microarchitecture: Skylake
Core Name: Skylake
Core Family: 6
Core Model: 94
Socket: LGA-1151
Package: FCLGA-1151
Chipset: Sunrise
Target Segment: Desktop
Max CPUs: 1
TDP: 65 W
Release Price: $187.00

Cache Specifications

L1 Cache: 256 KiB
L1 Instruction Cache: 128 KiB (8-way set associative)
L1 Data Cache: 128 KiB (8-way set associative)
L2 Cache: 1 MiB (4-way set associative)
L3 Cache: 6 MiB

Memory Specifications

Supported Memory Type: DDR3L-1600 and DDR4-2133
Memory Channels: 2
Maximum Memory: 64 GB
Maximum Bandwidth: 31.79 GB/s
ECC Support: No

Integrated Graphics

GPU: HD Graphics 530
GPU Designer: Intel
GPU Max Frequency: 950 MHz
Execution Units: 24

Physical Specifications

Process: 14 nm
Die Area: 122 mm²
Manufacturer: Intel
Technology: CMOS
Word Size: 64-bit
ISA: x86-64 (x86)

CPU Features

MMX EMMX SSE SSE2 SSE3 SSSE3 SSE4.1 SSE4.2 AVX AVX2 ABM BMI1 BMI2 FMA3 AES RdRand ADX CLMUL F16C x86-16 x86-32 x86-64 Real Protected SMM FPU NX TBT 2.0 EIST TXT vPro VT-x VT-d EPT MPX SGX Secure Key SMEP IPT TSX BPT
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