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Intel Core i5-6400T vs Intel Core i5-6600K

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 i5-6600K

► remove from comparison Intel 6600K

The Intel Core i5-6600K is a high-end 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 3.5 up to 3.9 GHz (2 cores: 3.8 GHz, 3 cores: 3.7 GHz, 4 cores: 3.6 GHz) and – contrary to the i7-series – does not support Hyperthreading. Being a so called "K"-model, the Core i5-6600K has a free multiplier and can be easily overclocked. 

Performance

Because of the slightly slower clocks, the smaller L3-cache (6 instead of 8 MB) as well as the missing Hyperthreading support, the Core i5-6600K is about 10-30 percent slower than the top model i7-6700K. The CPU will still handle demanding applications and games without any problems.

Graphics

Graphics are handled by the integrated Intel HD Graphics 530 with 24 EUs (Execution Units), which is clocked at 350 - 1150 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

The TDP was slightly raised from 88 to 91 Watts compared to the predecessor.

ModelIntel Core i5-6400TIntel Core i5-6600K
SeriesIntel Core i5 (Desktop)Intel Core i5 (Desktop)
CodenameSkylakeSkylake
Series: Core i5 (Desktop) Skylake
Intel Core i5-6600K3.5 - 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 i5-6400 compare2.7 - 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 i5-6600K3.5 - 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 i5-6400 compare2.7 - 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
Clock2200 - 2800 MHz3500 - 3900 MHz
L1 Cache256 KB256 KB
L2 Cache1 MB1 MB
L3 Cache6 MB6 MB
Cores / Threads4 / 44 / 4
TDP35 Watt91 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 save
iGPUIntel HD Graphics 530 (350 - 950 MHz)Intel HD Graphics 530 (350 - 1150 MHz)
Architecturex86x86
$192 U.S.$242 U.S.
Announced
ManufacturerIntel Core i5 (Desktop) 6400TIntel Core i5 (Desktop) 6600K

Benchmarks

Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
420 Points (4%)
min: 601     avg: 615     median: 601.5 (6%)     max: 654 Points
Cinebench R15 - Cinebench R15 CPU Single 64 Bit
119 Points (37%)
min: 161     avg: 165.5     median: 166 (51%)     max: 169 Points
Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
4.8 Points (9%)
min: 6.93     avg: 7.1     median: 6.9 (13%)     max: 7.5 Points
Cinebench R11.5 - Cinebench R11.5 CPU Single 64 Bit
1.4 Points (4%)
min: 1.88     avg: 1.9     median: 1.9 (6%)     max: 2.03 Points
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
4397 Points (39%)
6188 Points (55%)
Cinebench R10 - Cinebench R10 Rend. Multi (32bit)
14798 Points (20%)
21324 Points (29%)
Cinebench R10 - Cinebench R10 Rend. Multi (64bit)
18940 Points (16%)
29100 Points (24%)
Cinebench R10 - Cinebench R10 Rend. Single (64bit)
5740 Points (35%)
8370 Points (51%)
wPrime 2.10 - wPrime 2.0 1024m *
100%
1 6400T +
404.5 s (5%)
wPrime 2.10 - wPrime 2.0 32m *
100%
1 6400T +
12.9 s (3%)
WinRAR - WinRAR 4.0
2770 Points (16%)
3643 Points (21%)
X264 HD Benchmark 4.0 - x264 Pass 2
28.1 fps (12%)
40.1 fps (17%)
X264 HD Benchmark 4.0 - x264 Pass 1
139.2 fps (37%)
196.3 fps (52%)
TrueCrypt - TrueCrypt Serpent
0.2 GB/s (0%)
0.3 GB/s (0%)
TrueCrypt - TrueCrypt Twofish
0.4 GB/s (0%)
0.5 GB/s (0%)
TrueCrypt - TrueCrypt AES
2.2 GB/s (0%)
3.2 GB/s (0%)
3DMark 06 - CPU - 3DMark 06 - CPU
5161 Points (11%)
7413 Points (16%)
Super Pi mod 1.5 XS 1M - Super Pi mod 1.5 XS 1M *
13 s (3%)
9.5 s (2%)
Super Pi mod 1.5 XS 2M - Super Pi mod 1.5 XS 2M *
29 s (1%)
21.5 s (1%)
Super Pi Mod 1.5 XS 32M - Super Pi mod 1.5 XS 32M *
681 s (3%)
501 s (2%)
3DMark Vantage - 3DM Vant. Perf. CPU no Physx
100%
1 6600K +
21951 Points (21%)
3DMark 11 - 3DM11 Performance Physics
5475 Points (19%)
7754 Points (27%)
3DMark - 3DMark Ice Storm Physics
42400 Points (27%)
61050 Points (39%)
3DMark - 3DMark Cloud Gate Physics
3887 Points (10%)
5562 Points (14%)
3DMark - 3DMark Fire Strike Standard Physics
5433 Points (13%)
7863 Points (18%)
Geekbench 3 - Geekbench 3 32 Bit Multi-Core
8687 Points (15%)
12270 Points (22%)
Geekbench 3 - Geekbench 3 32 Bit Single-Core
3000 Points (59%)
4080 Points (80%)
Geekbench 3 - Geekbench 3 64 Bit Multi-Core
9133 Points (14%)
min: 12175     avg: 12545     median: 12544.5 (20%)     max: 12914 Points
Geekbench 3 - Geekbench 3 64 Bit Single-Core
3131 Points (51%)
min: 4160     avg: 4215     median: 4214.5 (69%)     max: 4269 Points
Mozilla Kraken 1.1 - Kraken 1.1 Total Score *
100%
1 6600K +
850 ms (1%)
Sunspider - Sunspider 1.0 Total Score *
89.2 ms (1%)
64.4 ms (1%)
Octane V2 - Octane V2 Total Score
100%
1 6600K +
43012 Points (44%)

Average Benchmarks Intel Core i5-6400T → 100% n=27

Average Benchmarks Intel Core i5-6600K → 135% n=27

- 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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show all (including archived), 2022, 2021
v1.18
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Redaktion, 2017-09- 8 (Update: 2017-09-11)