Intel Core i5-6400T

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).


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.


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 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).

SeriesIntel Core i5 (Desktop)
Series: Core i5 (Desktop) Skylake
Intel Core i5-6600K (compare)3500 - 3900 MHz4 / 46 MB
Intel Core i5-6500 (compare)3200 - 3600 MHz4 / 46 MB
Intel Core i5-6600T (compare)2700 - 3500 MHz4 / 46 MB
Intel Core i5-6400 (compare)2700 - 3300 MHz4 / 46 MB
Intel Core i5-6500T (compare)2500 - 3100 MHz4 / 46 MB
» Intel Core i5-6400T2200 - 2800 MHz4 / 46 MB
Clock Rate2200 - 2800 MHz
Level 1 Cache256 KB
Level 2 Cache1 MB
Level 3 Cache6 MB
Number of Cores / Threads4 / 4
Max. Power Consumption (TDP = Thermal Design Power)35 Watt
Manufacturing Technology14 nm
FeaturesDDR3(L)-1600/DDR4-2133 Memory Controller, AVX, AVX2, AES-NI, TSX-NI, Quick Sync, Virtualization, vPro
GPUIntel HD Graphics 530 (350 - 950 MHz)
64 Bit64 Bit support
Starting Price$192 U.S.
Announcement Date08/05/2015
Product Link (external)Intel Core i5 (Desktop) 6400T


Cinebench R10 - Rendering Multiple CPUs 32Bit
14798 Points (23%)
wPrime 2.0x - 1024m *
404.5 seconds (5%)
wPrime 2.0x - 32m *
12.9 seconds (3%)
- Range of benchmark values for this graphics card
- Average benchmark values for this graphics card
* Smaller numbers mean a higher performance

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