Intel Core i5-8400T vs Intel Core i5-7640X

Comparative analysis of Intel Core i5-8400T and Intel Core i5-7640X processors for all known characteristics in the following categories: Essentials, Performance, Memory, Graphics, Graphics interfaces, Graphics image quality, Graphics API support, Compatibility, Peripherals, Security & Reliability, Advanced Technologies, Virtualization. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark, Geekbench 4 - Single Core, Geekbench 4 - Multi-Core, 3DMark Fire Strike - Physics Score.

Intel Core i5-8400T

Intel Core i5-7640X

Differences

Reasons to consider the Intel Core i5-8400T

CPU is newer: launch date 10 month(s) later
2 more cores, run more applications at once: 6 vs 4
2 more threads: 6 vs 4
Around 50% more L1 cache; more data can be stored in the L1 cache for quick access later
Around 50% more L2 cache; more data can be stored in the L2 cache for quick access later
Around 50% more L3 cache; more data can be stored in the L3 cache for quick access later
2x more maximum memory size: 128 GB vs 64 GB
3.2x lower typical power consumption: 35 Watt vs 112 Watt
Around 9% better performance in PassMark - CPU mark: 7432 vs 6844
Around 1% better performance in Geekbench 4 - Multi-Core: 3657 vs 3628

Specifications (specs)
Launch date	April 2018 vs June 2017
Number of cores	6 vs 4
Number of threads	6 vs 4
L1 cache	64 KB (per core) vs 64 KB (per core)
L2 cache	256 KB (per core) vs 256 KB (per core)
L3 cache	9216 KB (shared) vs 6144 KB (shared)
Maximum memory size	128 GB vs 64 GB
Thermal Design Power (TDP)	35 Watt vs 112 Watt
Benchmarks
PassMark - CPU mark	7432 vs 6844
Geekbench 4 - Multi-Core	3657 vs 3628

Reasons to consider the Intel Core i5-7640X

Processor is unlocked, an unlocked multiplier allows for easier overclocking
Around 27% higher clock speed: 4.20 GHz vs 3.30 GHz
Around 32% better performance in PassMark - Single thread mark: 2532 vs 1920
Around 34% better performance in Geekbench 4 - Single Core: 1151 vs 861

Specifications (specs)
Unlocked	Unlocked vs Locked
Maximum frequency	4.20 GHz vs 3.30 GHz
Benchmarks
PassMark - Single thread mark	2532 vs 1920
Geekbench 4 - Single Core	1151 vs 861

Compare benchmarks

CPU 1: Intel Core i5-8400T
CPU 2: Intel Core i5-7640X

PassMark - Single thread mark

CPU 1

CPU 2

1920

2532

PassMark - CPU mark

CPU 1

CPU 2

7432

6844

Geekbench 4 - Single Core

CPU 1

CPU 2

861

1151

Geekbench 4 - Multi-Core

CPU 1

CPU 2

3657

3628

Name	Intel Core i5-8400T	Intel Core i5-7640X
PassMark - Single thread mark	1920	2532
PassMark - CPU mark	7432	6844
Geekbench 4 - Single Core	861	1151
Geekbench 4 - Multi-Core	3657	3628
3DMark Fire Strike - Physics Score		0

Compare specifications (specs)

	Intel Core i5-8400T	Intel Core i5-7640X
Essentials
Architecture codename	Coffee Lake	Kaby Lake
Launch date	April 2018	June 2017
Place in performance rating	1502	1503
Price now	$179	$263.13
Processor Number	i5-8400T	i5-7640X
Series	8th Generation Intel® Core™ i5 Processors	Intel® Core™ X-series Processors
Status	Launched	Discontinued
Value for money (0-100)	15.83	10.73
Vertical segment	Desktop	Desktop
Launch price (MSRP)		$240
Performance
64 bit support
Base frequency	1.70 GHz	4.00 GHz
Bus Speed	8 GT/s DMI3	8 GT/s DMI3
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	9216 KB (shared)	6144 KB (shared)
Manufacturing process technology	14 nm	14 nm
Maximum case temperature (TCase)	72 °C	72 °C
Maximum core temperature	100°C	100°C
Maximum frequency	3.30 GHz	4.20 GHz
Number of cores	6	4
Number of threads	6	4
Number of QPI Links		0
Unlocked
Memory
Max memory channels	2	2
Maximum memory bandwidth	41.6 GB/s
Maximum memory size	128 GB	64 GB
Supported memory types	DDR4-2666	DDR4-2666
Graphics
Device ID	0x3E92
Graphics base frequency	350 MHz
Graphics max dynamic frequency	1.05 GHz
Intel® Clear Video HD technology
Intel® Clear Video technology
Intel® InTru™ 3D technology
Intel® Quick Sync Video
Max video memory	64 GB
Processor graphics	Intel® UHD Graphics 630
Graphics interfaces
Number of displays supported	3
Graphics image quality
4K resolution support
Max resolution over DisplayPort	4096x2304@60Hz
Max resolution over eDP	4096x2304@60Hz
Max resolution over HDMI 1.4	4096x2304@24Hz
Graphics API support
DirectX	12
OpenGL	4.5
Compatibility
Configurable TDP-down	25 W
Configurable TDP-down Frequency	1.20 GHz
Low Halogen Options Available
Max number of CPUs in a configuration	1	1
Package Size	37.5mm x 37.5mm
Sockets supported	FCLGA1151	FCLGA2066
Thermal Design Power (TDP)	35 Watt	112 Watt
Thermal Solution	PCG 2015A (35W)	PCG 2017X
Peripherals
Max number of PCIe lanes	16	16
PCI Express revision	3.0	3.0
PCIe configurations	Up to 1x16, 2x8, 1x8+2x4	Up to 1x16, 2x8, 1x8+2x4
Scalability	1S Only	1S Only
Security & Reliability
Execute Disable Bit (EDB)
Intel® Identity Protection technology
Intel® Memory Protection Extensions (Intel® MPX)
Intel® OS Guard
Intel® Secure Key technology
Intel® Software Guard Extensions (Intel® SGX)
Intel® Trusted Execution technology (TXT)
Secure Boot
Advanced Technologies
Enhanced Intel SpeedStep® technology
Idle States
Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
Intel 64
Intel® Advanced Vector Extensions (AVX)
Intel® AES New Instructions
Intel® Hyper-Threading technology
Intel® Optane™ Memory Supported
Intel® Stable Image Platform Program (SIPP)
Intel® TSX-NI
Intel® Turbo Boost technology
Intel® vPro™ Platform Eligibility
Thermal Monitoring
Virtualization
Intel® Virtualization Technology (VT-x)
Intel® Virtualization Technology for Directed I/O (VT-d)
Intel® VT-x with Extended Page Tables (EPT)