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Core i5-6400


Description
The Core i5-6400 is a cpu manufactured by Intel that was released on September 2015. This model has 4 Skylake-S cores , runs at 2700 MHz as base frequency and has a a thermal design power of 65 W.

The i5-6400 has 4x32+4x32 kB of cache L1, 4x256 kB of cache L2 and 6144 kB of cache L3.

Sky Lake is also known as 6th generation Core. Include Thunderbolt 3.0, SATA Express and Iris Pro graphics with DirectX 12. It uses LGA 1151 socket for mainstream models and LGA 2066 for X-Series. Sky Lake comes with AVX2 support in all mainstreams CPUs and AVX-512 in some high end models.

Specs
Official name
Intel(R) Core(TM) i5-6400 CPU @ 2.70GHz
CPUID
506e3
Core
Skylake-S
Architecture
Base frecuency
2.7 GHz
Boost frecuency
3.3 GHz
Socket
LGA 1151
Cores/Threads
4/4
TDP
65 W
Cache L1 (d+i)
4x32+4x32 kB
Cache L2
4x256 kB
Cache L3
6144 kB
Release date
September 2015

Non-optimized benchmark
The benchmark in Mode 0 (FPU) measures cpu performance with non-optimized software. It uses the basic µinstructions from the i386 architecture with the i387 floating point unit. This mode is compatible with all CPUs so it's practical to compare very different CPUs
Monothread
Multithread
Test#1 (Integers)
3185
10777 (x3.4)
Test#2 (FP)
12581
44113 (x3.5)
Test#3 (Generic, ZIP)
4105
13887 (x3.4)
Test#1 (Memory)
3934
7829 (x2.0)
TOTAL
23805
76606 (x3.2)

SSE3 optimized benchmark
The benchmark in mode I (SSE) is optimized for the use of SIMD instructions with 128 bits register and the SSE set up to version 3. Nearly every modern CPU has support for this mode.
Monothread
Multithread
Test#1 (Integers)
11411
41474 (x3.6)
Test#2 (FP)
16352
65462 (x4.0)
Test#3 (Generic, ZIP)
4146
16202 (x3.9)
Test#1 (Memory)
3277
7660 (x2.3)
TOTAL
35186
130798 (x3.7)

AVX optimized benchmark
The benchmark in mode II (AVX) is optimized to used 256 bits registers beside the first version of the Advanced Vector Extensions (AVX). The first AVX compatible CPU was released in 2011.
Monothread
Multithread
Test#1 (Integers)
11824
46044 (x3.9)
Test#2 (FP)
18358
69468 (x3.8)
Test#3 (Generic, ZIP)
4426
16330 (x3.7)
Test#1 (Memory)
4950
7742 (x1.6)
TOTAL
39558
139584 (x3.5)

AVX2 optimized benchmark
The benchmark in mode III (AVX2), like AVX1, is optimized to used 256 bits registers beside the second version of the Advanced Vector Extensions (AVX). The first AVX2 compatible CPU was released in 2013.
Monothread
Multithread
Test#1 (Integers)
21213
80359 (x3.8)
Test#2 (FP)
18149
71943 (x4.0)
Test#3 (Generic, ZIP)
4213
16375 (x3.9)
Test#1 (Memory)
4304
8054 (x1.9)
TOTAL
47879
176731 (x3.7)

Monothread performance graph
Monothread performance graphics gives the performance vs time. They are useful to measure the time it takes to the CPU to reach the maximum performance.

Usually, CPU's performance will be steady during these tests but if it has a slow frequency strategy, the first samples will show a lower score.


Test#1 (Integers) [% vs time]

grafica bm.hardlimit.com


Test#2 (FP) [% vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [% vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [% vs time]

grafica bm.hardlimit.com

Multithread performance graph
Multithread graphs measure the performance against a heavy load during certain time.

If CPU's TDP doesn't limit the frequency and the machine is properly cooled, performance should remain steady vs time. Otherwise, the performance score will oscillate or decrease over time.


Test#1 (Integers) [% vs time]

grafica bm.hardlimit.coma


Test#2 (FP) [% vs time]

grafica bm.hardlimit.coma


Test#3 (Generic, ZIP) [% vs time]

grafica bm.hardlimit.coma


Test#1 (Memory) [% vs time]

grafica bm.hardlimit.coma

Similar CPUs to Core i5-6400
Intel Core i5-6400 (This model)
 Mode FPU monothread  [23805 points]
 Mode FPU multithread  [76606 points]
 Mode AVX2 monothread  [47879 points]
 Mode AVX2 multithread  [176731 points]
 Mode FPU monothread  [30829 points +29.51%]
 Mode FPU multithread  [90854 points +18.60%]
 Mode AVX2 monothread  [55591 points +16.11%]
 Mode AVX2 multithread  [177841 points +0.63%]
 Mode FPU monothread  [28342 points +19.06%]
 Mode FPU multithread  [84242 points +9.97%]
 Mode AVX2 monothread  [54852 points +14.56%]
 Mode AVX2 multithread  [175965 points -0.43%]
 Mode FPU monothread  [27299 points +14.68%]
 Mode FPU multithread  [101292 points +32.23%]
 Mode AVX2 monothread  [50409 points +5.28%]
 Mode AVX2 multithread  [206271 points +16.71%]
 Mode FPU monothread  [25362 points +6.54%]
 Mode FPU multithread  [49558 points -35.31%]
 Mode AVX2 monothread  [47245 points -1.32%]
 Mode AVX2 multithread  [101638 points -42.49%]
 Mode FPU monothread  [21020 points -11.70%]
 Mode FPU multithread  [70000 points -8.62%]
 Mode AVX2 monothread  [38294 points -20.02%]
 Mode AVX2 multithread  [138686 points -21.53%]
 Mode FPU monothread  [24123 points +1.34%]
 Mode FPU multithread  [95355 points +24.48%]
 Mode AVX2 monothread  [37320 points -22.05%]
 Mode AVX2 multithread  [151106 points -14.50%]
 Mode FPU monothread  [28468 points +19.59%]
 Mode FPU multithread  [117844 points +53.83%]
 Mode AVX2 monothread  [53555 points +11.86%]
 Mode AVX2 multithread  [219503 points +24.20%]
 Mode FPU monothread  [24373 points +2.39%]
 Mode FPU multithread  [51093 points -33.30%]
 Mode AVX2 monothread  [47102 points -1.62%]
 Mode AVX2 multithread  [98145 points -44.47%]
 Mode FPU monothread  [28910 points +21.45%]
 Mode FPU multithread  [106178 points +38.60%]
 Mode AVX2 monothread  [51428 points +7.41%]
 Mode AVX2 multithread  [194201 points +9.89%]
 Mode FPU monothread  [24406 points +2.53%]
 Mode FPU multithread  [55356 points -27.74%]
 Mode AVX2 monothread  [48247 points +0.77%]
 Mode AVX2 multithread  [109099 points -38.27%]
          
FPU mode comparison

Monothread integers operations
Model
Score
3241 [1.77%]
Intel Core i5-6400
3185
This model

Multithread integers operations
Model
Score
12246 [13.63%]
Intel Core i5-6400
10777
This model
9666 [-10.31%]

Monothread floating point operations
Model
Score
13158 [4.59%]
Intel Core i5-6400
12581
This model
12264 [-2.52%]
12238 [-2.73%]
12231 [-2.79%]
12185 [-3.15%]

Multithread floating point operations
Model
Score
52878 [19.87%]
50797 [15.15%]
50154 [13.69%]
Intel Core i5-6400
44113
This model
40728 [-7.67%]
38702 [-12.27%]

Monothread generic test (Zip compression)
Model
Score
Intel Core i5-6400
4105
This model

Multithread generic test (Zip compression)
Model
Score
14311 [3.06%]
Intel Core i5-6400
13887
This model
13429 [-3.30%]
12689 [-8.62%]
12565 [-9.52%]
12376 [-10.88%]
12129 [-12.66%]

Monothread memory performance
Model
Score
Intel Core i5-6400
3934
This model

Multithread memory performance
Model
Score
8201 [4.75%]
Intel Core i5-6400
7829
This model
7082 [-9.54%]
          
SSE mode comparison

Monothread integers operations
Model
Score
11671 [2.27%]
Intel Core i5-6400
11411
This model
11389 [-0.20%]
11105 [-2.68%]
10196 [-10.65%]

Multithread integers operations
Model
Score
44607 [7.55%]
Intel Core i5-6400
41474
This model
41109 [-0.88%]
41004 [-1.13%]
34434 [-16.98%]
32503 [-21.63%]
31501 [-24.05%]

Monothread floating point operations
Model
Score
Intel Core i5-6400
16352
This model
15972 [-2.32%]
15846 [-3.10%]
15107 [-7.61%]
14355 [-12.22%]
14019 [-14.27%]

Multithread floating point operations
Model
Score
77016 [17.65%]
75624 [15.52%]
74193 [13.34%]
72582 [10.88%]
Intel Core i5-6400
65462
This model
65038 [-0.65%]
64608 [-1.30%]
62550 [-4.45%]
60203 [-8.03%]

Monothread generic test (Zip compression)
Model
Score
Intel Core i5-6400
4146
This model

Multithread generic test (Zip compression)
Model
Score
18086 [11.63%]
17399 [7.39%]
Intel Core i5-6400
16202
This model
15777 [-2.62%]
15605 [-3.69%]
15474 [-4.49%]
14911 [-7.97%]

Monothread memory performance
Model
Score
3293 [0.49%]
Intel Core i5-6400
3277
This model
3082 [-5.95%]
3026 [-7.65%]

Multithread memory performance
Model
Score
Intel Core i5-6400
7660
This model
          
AVX mode comparison

Monothread integers operations
Model
Score
12119 [2.49%]
Intel Core i5-6400
11824
This model
11784 [-0.34%]
11586 [-2.02%]
11538 [-2.42%]

Multithread integers operations
Model
Score
Intel Core i5-6400
46044
This model
45911 [-0.29%]
45747 [-0.65%]
45738 [-0.67%]
44810 [-2.68%]

Monothread floating point operations
Model
Score
18975 [3.36%]
Intel Core i5-6400
18358
This model
18271 [-0.47%]
18056 [-1.64%]
17891 [-2.54%]
17552 [-4.39%]
17366 [-5.40%]

Multithread floating point operations
Model
Score
Intel Core i5-6400
69468
This model
67501 [-2.83%]
61912 [-10.88%]
60653 [-12.69%]

Monothread generic test (Zip compression)
Model
Score
Intel Core i5-6400
4426
This model

Multithread generic test (Zip compression)
Model
Score
17814 [9.09%]
Intel Core i5-6400
16330
This model
14639 [-10.35%]

Monothread memory performance
Model
Score
5098 [2.99%]
Intel Core i5-6400
4950
This model
4799 [-3.05%]

Multithread memory performance
Model
Score
Intel Core i5-6400
7742
This model
          
AVX2 mode comparison

Monothread integers operations
Model
Score
Intel Core i5-6400
21213
This model
21147 [-0.31%]
21092 [-0.57%]
20683 [-2.50%]

Multithread integers operations
Model
Score
Intel Core i5-6400
80359
This model
79853 [-0.63%]
78378 [-2.47%]
75272 [-6.33%]

Monothread floating point operations
Model
Score
18509 [1.98%]
Intel Core i5-6400
18149
This model
17761 [-2.14%]
17292 [-4.72%]
16519 [-8.98%]
16513 [-9.01%]

Multithread floating point operations
Model
Score
Intel Core i5-6400
71943
This model
71851 [-0.13%]
70301 [-2.28%]
68277 [-5.10%]
66345 [-7.78%]

Monothread generic test (Zip compression)
Model
Score
4221 [0.19%]
Intel Core i5-6400
4213
This model

Multithread generic test (Zip compression)
Model
Score
Intel Core i5-6400
16375
This model
16125 [-1.52%]
15822 [-3.37%]
15765 [-3.73%]
15478 [-5.47%]

Monothread memory performance
Model
Score
Intel Core i5-6400
4304
This model
4238 [-1.53%]

Multithread memory performance
Model
Score
8168 [1.42%]
Intel Core i5-6400
8054
This model
8028 [-0.32%]
7828 [-2.80%]

Hardlimit Benchmark Central - Ver. 3.7.9