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

► remove from comparison

The Intel Core i5-6600T 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 2.7-3.5 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

The performance should be similar to the old Core i5-2500K desktop processor (but at a much lower TDP) as well as the mobile Core i5-6440HQ (100 MHz lower base clock and GPU Turbo clock, 10 Watts higher TDP).

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

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 i5-6600TIntel Core i5-6600K
SeriesIntel Core i5 (Desktop)Intel Core i5 (Desktop)Intel Core i5 (Desktop)
CodenameSkylakeSkylakeSkylake
Series: Core i5 (Desktop) Skylake
Intel Core i5-6600K3.5 - 3.9 GHz4 / 46 MB
Intel Core i5-65003.2 - 3.6 GHz4 / 46 MB
Intel Core i5-6600T2.7 - 3.5 GHz4 / 46 MB
Intel Core i5-64002.7 - 3.3 GHz4 / 46 MB
Intel Core i5-6500T2.5 - 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 i5-65003.2 - 3.6 GHz4 / 46 MB
» Intel Core i5-6600T2.7 - 3.5 GHz4 / 46 MB
Intel Core i5-64002.7 - 3.3 GHz4 / 46 MB
Intel Core i5-6500T2.5 - 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 i5-65003.2 - 3.6 GHz4 / 46 MB
Intel Core i5-6600T2.7 - 3.5 GHz4 / 46 MB
Intel Core i5-64002.7 - 3.3 GHz4 / 46 MB
Intel Core i5-6500T2.5 - 3.1 GHz4 / 46 MB
Intel Core i5-6400T2.2 - 2.8 GHz4 / 46 MB
Clock2200 - 2800 MHz2700 - 3500 MHz3500 - 3900 MHz
L1 Cache256 KB256 KB256 KB
L2 Cache1 MB1 MB1 MB
L3 Cache6 MB6 MB6 MB
Cores / Threads4 / 44 / 44 / 4
TDP35 Watt35 Watt91 Watt
Technology14 nm14 nm14 nm
SocketFCLGA1151FCLGA1151FCLGA1151
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, 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 - 1100 MHz)Intel HD Graphics 530 (350 - 1150 MHz)
Architecturex86x86x86
$192 U.S.$192 U.S.$242 U.S.
Announced
ManufacturerIntel Core i5 (Desktop) 6400TIntel Core i5 (Desktop) 6600TIntel Core i5 (Desktop) 6600K

Benchmarks

Cinebench R15 - Cinebench R15 CPU Multi 64 Bit
420 Points (4%)
min: 418     avg: 464.5     median: 464.5 (5%)     max: 511 Points
min: 601     avg: 615     median: 601.5 (6%)     max: 654 Points
Cinebench R15 - Cinebench R15 CPU Single 64 Bit
119 Points (36%)
min: 135     avg: 138     median: 138 (42%)     max: 141 Points
min: 161     avg: 165.5     median: 166 (51%)     max: 169 Points
Cinebench R11.5 - Cinebench R11.5 CPU Multi 64 Bit
4.8 Points (7%)
min: 5.28     avg: 5.6     median: 5.6 (8%)     max: 5.88 Points
min: 6.93     avg: 7.1     median: 6.9 (10%)     max: 7.5 Points
Cinebench R11.5 - Cinebench R11.5 CPU Single 64 Bit
1.4 Points (4%)
min: 1.5     avg: 1.6     median: 1.6 (5%)     max: 1.63 Points
min: 1.88     avg: 1.9     median: 1.9 (6%)     max: 2.03 Points
Cinebench R10 - Cinebench R10 Rend. Single (32bit)
4397 Points (36%)
min: 5234     avg: 5355     median: 5354.5 (44%)     max: 5475 Points
6188 Points (50%)
Cinebench R10 - Cinebench R10 Rend. Multi (32bit)
14798 Points (17%)
min: 16473     avg: 17623     median: 17622.5 (20%)     max: 18772 Points
21324 Points (24%)
Cinebench R10 - Cinebench R10 Rend. Multi (64bit)
18940 Points (14%)
20716 Points (16%)
29100 Points (22%)
Cinebench R10 - Cinebench R10 Rend. Single (64bit)
5740 Points (31%)
6771 Points (37%)
8370 Points (46%)
wPrime 2.10 - wPrime 2.0 1024m *
100%
1 6400T +
404.5 s (5%)
101%
1 6600T +
min: 318.9     avg: 323.1     median: 323.1 (4%)     max: 327.3 s
wPrime 2.10 - wPrime 2.0 32m *
100%
1 6400T +
12.9 s (3%)
101%
1 6600T +
min: 9.912     avg: 10.1     median: 10.1 (2%)     max: 10.2 s
WinRAR - WinRAR 4.0
2770 Points (16%)
min: 3148     avg: 3151     median: 3151 (18%)     max: 3154 Points
3643 Points (21%)
X264 HD Benchmark 4.0 - x264 Pass 2
28.1 fps (10%)
min: 32.59     avg: 33.5     median: 33.4 (12%)     max: 34.3 fps
40.1 fps (15%)
X264 HD Benchmark 4.0 - x264 Pass 1
139.2 fps (33%)
min: 160.1     avg: 163.9     median: 163.9 (39%)     max: 167.7 fps
196.3 fps (46%)
TrueCrypt - TrueCrypt Serpent
0.2 GB/s (0%)
min: 0.291     avg: 0.3     median: 0.3 (0%)     max: 0.294 GB/s
0.3 GB/s (0%)
TrueCrypt - TrueCrypt Twofish
0.4 GB/s (0%)
min: 0.491     avg: 0.5     median: 0.5 (0%)     max: 0.494 GB/s
0.5 GB/s (0%)
TrueCrypt - TrueCrypt AES
2.2 GB/s (0%)
min: 2.8     avg: 2.9     median: 2.9 (0%)     max: 2.9 GB/s
3.2 GB/s (0%)
3DMark 06 - CPU - 3DMark 06 - CPU
5161 Points (11%)
min: 5831     avg: 6276     median: 6275.5 (13%)     max: 6720 Points
7413 Points (16%)
Super Pi mod 1.5 XS 1M - Super Pi mod 1.5 XS 1M *
13 s (3%)
min: 11     avg: 16.5     median: 16.5 (4%)     max: 22 s
9.5 s (2%)
Super Pi mod 1.5 XS 2M - Super Pi mod 1.5 XS 2M *
29 s (1%)
min: 24     avg: 51     median: 51 (2%)     max: 78 s
21.5 s (1%)
Super Pi Mod 1.5 XS 32M - Super Pi mod 1.5 XS 32M *
681 s (3%)
min: 575     avg: 935     median: 934.5 (4%)     max: 1294 s
501 s (2%)
3DMark Vantage - 3DM Vant. Perf. CPU no Physx
100%
1 6600K +
21951 Points (20%)
3DMark 11 - 3DM11 Performance Physics
5475 Points (15%)
5406 Points (15%)
7754 Points (21%)
3DMark - 3DMark Ice Storm Physics
42400 Points (27%)
49853 Points (32%)
61050 Points (39%)
3DMark - 3DMark Cloud Gate Physics
3887 Points (10%)
4769 Points (12%)
5562 Points (14%)
3DMark - 3DMark Fire Strike Standard Physics
5433 Points (10%)
6686 Points (12%)
7863 Points (15%)
Geekbench 3 - Geekbench 3 32 Bit Multi-Core
8687 Points (15%)
min: 9886     avg: 10463     median: 10463 (19%)     max: 11040 Points
12270 Points (22%)
Geekbench 3 - Geekbench 3 32 Bit Single-Core
3000 Points (59%)
min: 3473     avg: 3528     median: 3528 (69%)     max: 3583 Points
4080 Points (80%)
Geekbench 3 - Geekbench 3 64 Bit Multi-Core
9133 Points (14%)
min: 10304     avg: 10943     median: 10943 (17%)     max: 11582 Points
min: 12175     avg: 12545     median: 12544.5 (20%)     max: 12914 Points
Geekbench 3 - Geekbench 3 64 Bit Single-Core
3131 Points (51%)
min: 3667     avg: 3701     median: 3700.5 (61%)     max: 3734 Points
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%)
88.2 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 i5-6600T → 116% 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

v1.22
log 09. 20:22:25

#0 checking url part for id 8006 +0s ... 0s

#1 checking url part for id 7859 +0s ... 0s

#2 checking url part for id 6950 +0s ... 0s

#3 not redirecting to Ajax server +0s ... 0s

#4 did not recreate cache, as it is less than 5 days old! Created at Wed, 07 Dec 2022 16:40:39 +0100 +0.001s ... 0.001s

#5 composed specs +0.018s ... 0.019s

#6 did output specs +0s ... 0.019s

#7 getting avg benchmarks for device 8006 +0.002s ... 0.021s

#8 got single benchmarks 8006 +0.007s ... 0.028s

#9 getting avg benchmarks for device 7859 +0.002s ... 0.029s

#10 got single benchmarks 7859 +0.007s ... 0.036s

#11 getting avg benchmarks for device 6950 +0.002s ... 0.038s

#12 got single benchmarks 6950 +0.009s ... 0.047s

#13 got avg benchmarks for devices +0s ... 0.047s

#14 min, max, avg, median took s +0.205s ... 0.252s

#15 return log +0s ... 0.252s

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