Intel Core i5-6400 vs Intel Core i5-6400T

Intel Core i5-6400

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The Intel Core i5-6400 is a desktop class quad-core CPU. The additional 4 threads are not available to the CPU as it is missing the HyperThreading support. The i5-6400 is based on Skylake architecture and clocks within the 2.7 GHz to 3.3 GHz range. 

Intel Core i5-6400T

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The Intel Core i5-6400T is a frugal quad-core desktop processor based on the Skylake architecture, which was announced in August 2015. The CPU, which is manufactured in a 14 nm process, runs at 2.2-2.8 GHz and does not support Hyperthreading (only 4 threads simultaneously).

Architecture

Intel uses Skylake to replace both Broadwell as well as Haswell and therefore uses one core design for all TDP classes between 4.5-45 Watts. Several improvements of the Skylake architecture include bigger Out-to-Order-Buffer, optimizations for pre-fetching as well as bigger gains by Hyperthreading. However, the changes are small for a "Tock" – a new micro architecture – in general, so the per-MHz performance is only between 5-10 % (compared to Haswell) or less than 5 % higher (compared to Broadwell), respectively.

Performance

Depending on the utilization of Hyperthreading, the performance is roughly on par with the old Core i7-2670QM mobile processor (Sandy Bridge, 2.2-2.8 GHz, Hyperthreading), but sometimes also much higher.

Graphics

Graphics are handled by the integrated Intel HD Graphics 530 with 24 EUs (Execution Units), which is clocked at 350 - 950 MHz. Compared to the HD Graphics 4600 (Haswell, 20 EUs), the performance is increased by around 25 percent. The overall GPU performance is still low-end, so modern games can, if at all, only be played smoothly with low settings.

Power Consumption

Intel specifies the TDP with 35 Watts, so it can also be used in notebooks (although bigger ones).

Intel Core i5-6400Intel Core i5-6400T
Intel Core i5 (Desktop)Intel Core i5 (Desktop)
SkylakeSkylake
: Core i5 (Desktop) Skylake
Intel Core i5-6600K compare3500 - 3900 MHz4 / 46 MB
Intel Core i5-6500 compare3200 - 3600 MHz4 / 46 MB
Intel Core i5-6600T compare2700 - 3500 MHz4 / 46 MB
» Intel Core i5-64002700 - 3300 MHz4 / 46 MB
Intel Core i5-6500T compare2500 - 3100 MHz4 / 46 MB
Intel Core i5-6400T2200 - 2800 MHz4 / 46 MB
Intel Core i5-6600K compare3500 - 3900 MHz4 / 46 MB
Intel Core i5-6500 compare3200 - 3600 MHz4 / 46 MB
Intel Core i5-6600T compare2700 - 3500 MHz4 / 46 MB
Intel Core i5-64002700 - 3300 MHz4 / 46 MB
Intel Core i5-6500T compare2500 - 3100 MHz4 / 46 MB
» Intel Core i5-6400T2200 - 2800 MHz4 / 46 MB
2700 - 3300 MHz2200 - 2800 MHz
256 KB256 KB
1 MB1 MB
6 MB6 MB
4 / 44 / 4
65 35
14 14
FCLGA1151FCLGA1151
DDR3(L)-1600/DDR4-2133 Memory Controller, AVX, AVX2, AES-NI, TSX-NI, Quick Sync, Virtualization, vProDDR3(L)-1600/DDR4-2133 Memory Controller, AVX, AVX2, AES-NI, TSX-NI, Quick Sync, Virtualization, vPro
iGPUIntel HD Graphics 530 (350 - 950 MHz)Intel HD Graphics 530 (350 - 950 MHz)
$187 U.S.$192 U.S.
Intel Core i5 (Desktop) 6400Intel Core i5 (Desktop) 6400T

Cinebench R15 - CPU Multi 64Bit
100%
6400 +
510 Points (12%)
420 Points (10%)
Cinebench R15 - CPU Single 64Bit
100%
6400 +
134 Points (60%)
119 Points (53%)
Cinebench R11.5 - CPU Multi 64Bit
100%
6400 +
5.9 Points (14%)
4.8 Points (11%)
Cinebench R11.5 - CPU Single 64Bit
100%
6400 +
1.5 Points (59%)
1.4 Points (53%)
Cinebench R10 - Rendering Single 32Bit
100%
6400 +
5088 Points (52%)
4397 Points (45%)
Cinebench R10 - Rendering Multiple CPUs 32Bit
100%
6400 +
18297 Points (31%)
14798 Points (25%)
Cinebench R10 - Rendering Multiple CPUs 64Bit
18940 Points (22%)
Cinebench R10 - Rendering Single CPUs 64Bit
5740 Points (53%)
wPrime 2.10 - 1024m *
100%
6400 +
327 seconds (4%)
405 seconds (5%)
wPrime 2.10 - 32m *
100%
6400 +
10.5 seconds (2%)
12.9 seconds (3%)
WinRAR - Result
2770 KB/s (28%)
X264 HD Benchmark 4.0 - Pass 2
100%
6400 +
33.9 fps (20%)
28.1 fps (17%)
X264 HD Benchmark 4.0 - Pass 1
100%
6400 +
150 fps (52%)
139 fps (48%)
TrueCrypt - Serpent Mean 100MB
100%
6400 +
0.3 GB/s (0%)
0.2 GB/s (0%)
TrueCrypt - Twofish Mean 100MB
100%
6400 +
0.4 GB/s (0%)
0.4 GB/s (0%)
TrueCrypt - AES Mean 100MB
100%
6400 +
2.7 GB/s (0%)
2.2 GB/s (0%)
3DMark 06 - CPU - CPU Score
5161 Points (35%)
Super Pi mod 1.5 XS 1M - 1M *
100%
6400 +
12 Seconds (3%)
13 Seconds (3%)
Super Pi mod 1.5 XS 2M - 2M *
100%
6400 +
27.6 Seconds (1%)
29 Seconds (1%)
Super Pi Mod 1.5 XS 32M - 32M *
100%
6400 +
660 Seconds (3%)
681 Seconds (3%)
3DMark 11 - Performance Physics 1280x720
100%
6400 +
6283 points (28%)
5475 points (25%)
3DMark - Ice Storm Standard Physics 1280x720
100%
6400 +
48092 Points (31%)
42400 Points (27%)
3DMark - Ice Storm Extreme Physics 1920x1080
100%
6400 +
50839 Points (61%)
3DMark - Ice Storm Unlimited Physics 1280x720 offscreen
100%
6400 +
53239 Points (62%)
3DMark - Cloud Gate Standard Physics 1280x720
100%
6400 +
4894 Points (12%)
3887 Points (10%)
3DMark - Fire Strike Physics 1920x1080
100%
6400 +
6903 Points (22%)
5433 Points (17%)
Geekbench 3 - 32 Bit Multi-Core Score
8687 Points (15%)
Geekbench 3 - 32 Bit Single-Core Score
3000 Points (62%)
Geekbench 3 - 64 Bit Multi-Core Score
9133 Points (14%)
Geekbench 3 - 64 Bit Single-Core Score
3131 Points (64%)
Sunspider - 1.0 Total Score *
100%
6400 +
82.9 ms (1%)
89.2 ms (1%)

Average Benchmarks Intel Core i5-6400 → 100%

Average Benchmarks Intel Core i5-6400T → 92%

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* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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> Notebook / Laptop Reviews and News > Benchmarks / Tech > Processor Comparison - Head 2 Head
Redaktion, 2017-09- 8 (Update: 2017-09-11)