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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).

ModelIntel Core i5-6400Intel Core i5-6400T
SeriesIntel Core i5 (Desktop)Intel Core i5 (Desktop)
CodenameSkylakeSkylake
Series: Core i5 (Desktop) Skylake
Intel Core i5-6600K compare3.5 - 3.9 GHz4 / 46 MB
Intel Core i5-6500 compare3.2 - 3.6 GHz4 / 46 MB
Intel Core i5-6600T compare2.7 - 3.5 GHz4 / 46 MB
» Intel Core i5-64002.7 - 3.3 GHz4 / 46 MB
Intel Core i5-6500T compare2.5 - 3.1 GHz4 / 46 MB
Intel Core i5-6400T2.2 - 2.8 GHz4 / 46 MB
Intel Core i5-6600K compare3.5 - 3.9 GHz4 / 46 MB
Intel Core i5-6500 compare3.2 - 3.6 GHz4 / 46 MB
Intel Core i5-6600T compare2.7 - 3.5 GHz4 / 46 MB
Intel Core i5-64002.7 - 3.3 GHz4 / 46 MB
Intel Core i5-6500T compare2.5 - 3.1 GHz4 / 46 MB
» Intel Core i5-6400T2.2 - 2.8 GHz4 / 46 MB
Clock2700 - 3300 MHz2200 - 2800 MHz
L1 Cache256 KB256 KB
L2 Cache1 MB1 MB
L3 Cache6 MB6 MB
Cores / Threads4 / 44 / 4
TDP65 Watt35 Watt
Technology14 nm14 nm
SocketFCLGA1151FCLGA1151
FeaturesDDR3(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)
Architecturex86x86
$187 U.S.$192 U.S.
Announced
ManufacturerIntel Core i5 (Desktop) 6400Intel Core i5 (Desktop) 6400T

Benchmarks

Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
100%
6400 +
510 Points (5%)
420 Points (4%)
Cinebench R15 - Cinebench R15 CPU Single 64 Bit
100%
6400 +
134 Points (46%)
119 Points (41%)
Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
100%
6400 +
5.9 Points (11%)
4.8 Points (9%)
Cinebench R11.5 - Cinebench R11.5 CPU Single 64 Bit
100%
6400 +
1.5 Points (43%)
1.4 Points (39%)
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
100%
6400 +
5088 Points (45%)
4397 Points (39%)
Cinebench R10 - Cinebench R10 Rend. Multi (32bit)
100%
6400 +
18297 Points (25%)
14798 Points (20%)
Cinebench R10 - Cinebench R10 Rend. Multi (64bit)
100%
1 6400T +
18940 Points (17%)
Cinebench R10 - Cinebench R10 Rend. Single (64bit)
100%
1 6400T +
5740 Points (35%)
wPrime 2.10 - wPrime 2.0 1024m *
100%
6400 +
327.1 s (4%)
404.5 s (5%)
wPrime 2.10 - wPrime 2.0 32m *
100%
6400 +
10.5 s (2%)
12.9 s (3%)
WinRAR - WinRAR 4.0
100%
1 6400T +
2770 Points (16%)
X264 HD Benchmark 4.0 - x264 Pass 2
100%
6400 +
33.9 fps (15%)
28.1 fps (13%)
X264 HD Benchmark 4.0 - x264 Pass 1
100%
6400 +
150.1 fps (41%)
139.2 fps (38%)
TrueCrypt - TrueCrypt Serpent
100%
6400 +
0.3 GB/s (9%)
0.2 GB/s (8%)
TrueCrypt - TrueCrypt Twofish
100%
6400 +
0.4 GB/s (9%)
0.4 GB/s (8%)
TrueCrypt - TrueCrypt AES
100%
6400 +
2.7 GB/s (10%)
2.2 GB/s (8%)
3DMark 06 - CPU - 3DMark 06 - CPU
100%
1 6400T +
5161 Points (11%)
Super Pi mod 1.5 XS 1M - Super Pi mod 1.5 XS 1M *
100%
6400 +
12 s (3%)
13 s (3%)
Super Pi mod 1.5 XS 2M - Super Pi mod 1.5 XS 2M *
100%
6400 +
27.6 s (1%)
29 s (1%)
Super Pi Mod 1.5 XS 32M - Super Pi mod 1.5 XS 32M *
100%
6400 +
660 s (3%)
681 s (3%)
3DMark 11 - 3DM11 Performance Physics
100%
6400 +
6283 Points (22%)
5475 Points (19%)
3DMark - 3DMark Ice Storm Physics
100%
6400 +
48092 Points (31%)
42400 Points (27%)
3DMark - 3DMark Ice Storm Extreme Physics
100%
1 6400 +
50839 Points (42%)
3DMark - 3DMark Ice Storm Unlimited Physics
100%
1 6400 +
53239 Points (45%)
3DMark - 3DMark Cloud Gate Physics
100%
6400 +
4894 Points (12%)
3887 Points (10%)
3DMark - 3DMark Fire Strike Standard Physics
100%
6400 +
6903 Points (17%)
5433 Points (13%)
Geekbench 3 - Geekbench 3 32 Bit Multi-Core
100%
1 6400T +
8687 Points (15%)
Geekbench 3 - Geekbench 3 32 Bit Single-Core
100%
1 6400T +
3000 Points (62%)
Geekbench 3 - Geekbench 3 64 Bit Multi-Core
100%
1 6400T +
9133 Points (14%)
Geekbench 3 - Geekbench 3 64 Bit Single-Core
100%
1 6400T +
3131 Points (64%)
Sunspider - Sunspider 1.0 Total Score *
100%
6400 +
82.9 ms (1%)
89.2 ms (1%)

Average Benchmarks Intel Core i5-6400 → 100% n=21

Average Benchmarks Intel Core i5-6400T → 89% n=21

- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance
1 This benchmark is not used for the average calculation

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v1.17
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Redaktion, 2017-09- 8 (Update: 2017-09-11)