i5-6400T vs i7-3970X

Primary details

Comparing Core i7-3970X and Core i5-6400T processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1138	1672
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.59	0.41
Market segment	Desktop processor	Desktop processor
Series	no data	Intel Core i5 (Desktop)
Architecture codename	Sandy Bridge-E (2011−2013)	Skylake (2015−2016)
Release date	1 November 2012 (11 years ago)	1 September 2015 (9 years ago)
Launch price (MSRP)	$593	$192

Cost-effectiveness evaluation

Performance per price, higher is better.

i7-3970X has 44% better value for money than i5-6400T.

Detailed specifications

Core i7-3970X and Core i5-6400T 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	6 (Hexa-Core)	4 (Quad-Core)
Threads	12	4
Base clock speed	3.5 GHz	2.2 GHz
Boost clock speed	4 GHz	2.8 GHz
Bus type	no data	DMI 3.0
Bus rate	5 GT/s	4 × 8 GT/s
Multiplier	no data	22
L1 cache	64 KB (per core)	256 KB
L2 cache	256 KB (per core)	1 MB
L3 cache	15 MB (shared)	6 MB
Chip lithography	32 nm	14 nm
Die size	435 mm2	122 mm2
Maximum core temperature	no data	66 °C
Maximum case temperature (TCase)	70 °C	no data
Number of transistors	2,270 million	no data
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	+	-

Compatibility

Information on Core i7-3970X and Core i5-6400T 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	FCLGA2011	FCLGA1151
Power consumption (TDP)	150 Watt	35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-3970X and Core i5-6400T. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2, Intel® AVX	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
AES-NI	+	+
AVX	+	+
vPro	no data	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	+	-
Idle States	+	+
Thermal Monitoring	+	+
Smart Response	+	no data
Demand Based Switching	-	no data
Status	Discontinued	Discontinued

Security technologies

Core i7-3970X and Core i5-6400T technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-3970X and Core i5-6400T are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-3970X and Core i5-6400T. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR3, DDR4
Maximum memory size	64.45 GB	64 GB
Max memory channels	4	2
Maximum memory bandwidth	51.2 GB/s	34.134 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

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

Graphics interfaces

Available interfaces and connections of Core i7-3970X and Core i5-6400T integrated GPUs.

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

Graphics image quality

Maximum display resolutions supported by Core i7-3970X and Core i5-6400T integrated GPUs, including resolutions over different interfaces.

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

Graphics API support

APIs supported by Core i7-3970X and Core i5-6400T integrated GPUs, sometimes API versions are included.

DirectX	no data	12
OpenGL	no data	4.5

Peripherals

Specifications and connection of peripherals supported by Core i7-3970X and Core i5-6400T.

PCIe version	2.0	3.0
PCI Express lanes	40	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.

Pros & cons summary

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Performance score	5.54	2.78
Recency	1 November 2012	1 September 2015
Physical cores	6	4
Threads	12	4
Chip lithography	32 nm	14 nm
Power consumption (TDP)	150 Watt	35 Watt

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Should you still have questions on choice between Core i7-3970X and Core i5-6400T, ask them in Comments section, and we shall answer.

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