i5-6400 vs i7-4785T

Primary details

Comparing Core i7-4785T and Core i5-6400 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1531	1551
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	0.66
Market segment	Desktop processor	Desktop processor
Series	no data	Intel Core i5
Power efficiency	9.41	4.96
Architecture codename	Haswell (2013−2015)	Skylake (2015−2016)
Release date	2 June 2013 (11 years ago)	2 July 2015 (9 years ago)
Launch price (MSRP)	no data	$187

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i7-4785T and Core i5-6400 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	4 (Quad-Core)	4 (Quad-Core)
Threads	8	4
Base clock speed	2.2 GHz	2.7 GHz
Boost clock speed	3.2 GHz	3.3 GHz
Bus type	no data	DMI 3.0
Bus rate	5 GT/s	4 × 8 GT/s
Multiplier	no data	27
L1 cache	64K (per core)	64K (per core)
L2 cache	256K (per core)	256K (per core)
L3 cache	8 MB (shared)	6 MB (shared)
Chip lithography	22 nm	14 nm
Die size	177 mm2	177 mm2
Maximum case temperature (TCase)	66 °C	72 °C
Number of transistors	1,400 million	no data
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Core i7-4785T and Core i5-6400 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	1	1 (Uniprocessor)
Socket	FCLGA1150	FCLGA1151
Power consumption (TDP)	35 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-4785T and Core i5-6400. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	+	+
vPro	+	+
Enhanced SpeedStep (EIST)	+	+
My WiFi	+	no data
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	-
Idle States	+	+
Thermal Monitoring	+	+
SIPP	+	-
FDI	+	no data

Security technologies

Core i7-4785T and Core i5-6400 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+
Secure Key	+	+
MPX	-	+
Identity Protection	+	+
SGX	no data	Yes with Intel® ME
OS Guard	+	+
Anti-Theft	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-4785T and Core i5-6400 are enumerated here.

AMD-V	-	+
VT-d	+	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-4785T and Core i5-6400. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3-1333/1600, DDR3L-1333/1600	DDR3, DDR4
Maximum memory size	32 GB	64 GB
Max memory channels	2	2
Maximum memory bandwidth	25.6 GB/s	34.134 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card Compare	Intel HD Graphics 4600	Intel HD Graphics 530
Max video memory	2 GB	64 GB
Quick Sync Video	+	+
Clear Video	no data	+
Clear Video HD	+	+
Graphics max frequency	1.2 GHz	950 MHz
InTru 3D	+	+

Graphics interfaces

Available interfaces and connections of Core i7-4785T and Core i5-6400 integrated GPUs.

Number of displays supported	3	3
eDP	+	+
DisplayPort	+	+
HDMI	+	+
DVI	+	+
VGA	+	no data

Graphics image quality

Maximum display resolutions supported by Core i7-4785T and Core i5-6400 integrated GPUs, including resolutions over different interfaces.

4K resolution support	no data	+
Max resolution over HDMI 1.4	4096x2304@24Hz	4096x2304@24Hz
Max resolution over eDP	3840x2160@60Hz	4096x2304@60Hz
Max resolution over DisplayPort	3840x2160@60Hz	4096x2304@60Hz
Max resolution over VGA	1920x1200@60Hz	N/A

Graphics API support

APIs supported by Core i7-4785T and Core i5-6400 integrated GPUs, sometimes API versions are included.

DirectX	11.2/12	12
OpenGL	4.3	4.5

Peripherals

Specifications and connection of peripherals supported by Core i7-4785T and Core i5-6400.

PCIe version	Up to 3.0	3.0
PCI Express lanes	16	16

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

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Pros & cons summary

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Performance score	3.48	3.41
Integrated graphics card	1.84	2.59
Recency	2 June 2013	2 July 2015
Threads	8	4
Chip lithography	22 nm	14 nm
Power consumption (TDP)	35 Watt	65 Watt

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Should you still have questions on choice between Core i7-4785T and Core i5-6400, ask them in Comments section, and we shall answer.

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