i5-12400T vs i5-8400

Primary details

Comparing Core i5-8400 and Core i5-12400T processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	1129	765
Place by popularity	63	not in top-100
Cost-effectiveness evaluation	4.93	no data
Market segment	Desktop processor	Desktop processor
Series	Intel Core i5	no data
Power efficiency	8.46	27.61
Architecture codename	Coffee Lake-S (2017−2018)	Alder Lake-S (2022)
Release date	5 October 2017 (7 years ago)	January 2022 (2 years ago)
Launch price (MSRP)	$182	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i5-8400 and Core i5-12400T 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)	6 (Hexa-Core)
Performance-cores	no data	6
Threads	6	12
Base clock speed	2.8 GHz	1.8 GHz
Boost clock speed	4 GHz	4.2 GHz
Bus type	DMI 3.0	no data
Bus rate	4 × 8 GT/s	no data
Multiplier	28	no data
L1 cache	64K (per core)	80K (per core)
L2 cache	256K (per core)	1.25 MB (per core)
L3 cache	9 MB (shared)	18 MB (shared)
Chip lithography	14 nm	Intel 7 nm
Die size	149 mm2	163 mm2
Maximum core temperature	100 °C	100 °C
Maximum case temperature (TCase)	72 °C	no data
64 bit support	+	+
Windows 11 compatibility	+	+

Compatibility

Information on Core i5-8400 and Core i5-12400T 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 (Uniprocessor)	1
Socket	FCLGA1151	FCLGA1700
Power consumption (TDP)	65 Watt	35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-8400 and Core i5-12400T. 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	+	no data
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Turbo Boost Technology	2.0	2.0
Hyper-Threading Technology	-	+
TSX	-	+
Idle States	+	+
Thermal Monitoring	+	+
Turbo Boost Max 3.0	no data	-
Deep Learning Boost	-	+

Security technologies

Core i5-8400 and Core i5-12400T technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core i5-8400 and Core i5-12400T are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-8400 and Core i5-12400T. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3, DDR4	DDR5-4800, DDR4-3200
Maximum memory size	128 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	42.671 GB/s	76.8 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card Compare	Intel UHD Graphics 630	Intel UHD Graphics 730
Max video memory	64 GB	no data
Quick Sync Video	+	+
Clear Video	+	no data
Clear Video HD	+	+
Graphics max frequency	1.05 GHz	1.45 GHz
Execution Units	no data	24
InTru 3D	+	no data

Graphics interfaces

Available interfaces and connections of Core i5-8400 and Core i5-12400T integrated GPUs.

Number of displays supported

3

4

Graphics image quality

Maximum display resolutions supported by Core i5-8400 and Core i5-12400T integrated GPUs, including resolutions over different interfaces.

4K resolution support	+	no data
Max resolution over HDMI 1.4	4096x2304@24Hz	4096 x 2160 @ 60Hz
Max resolution over eDP	4096x2304@60Hz	5120 x 3200 @ 120Hz
Max resolution over DisplayPort	4096x2304@60Hz	7680 x 4320 @ 60Hz

Graphics API support

APIs supported by Core i5-8400 and Core i5-12400T integrated GPUs, sometimes API versions are included.

DirectX	12	12
OpenGL	4.5	4.5

Peripherals

Specifications and connection of peripherals supported by Core i5-8400 and Core i5-12400T.

PCIe version	3.0	5.0 and 4.0
PCI Express lanes	16	20

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	5.81	10.21
Integrated graphics card	3.09	4.16
Threads	6	12
Power consumption (TDP)	65 Watt	35 Watt

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Should you still have questions on choice between Core i5-8400 and Core i5-12400T, ask them in Comments section, and we shall answer.

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