Intel Core i5-9400T vs Intel Core i5-8400

Comparative analysis of Intel Core i5-9400T and Intel Core i5-8400 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Security & Reliability, Advanced Technologies, Virtualization, Graphics, Graphics interfaces, Graphics image quality, Graphics API support, Peripherals. Benchmark processor performance analysis: PassMark - Single thread mark, PassMark - CPU mark, Geekbench 4 - Single Core, Geekbench 4 - Multi-Core, 3DMark Fire Strike - Physics Score, CompuBench 1.5 Desktop - Face Detection (mPixels/s), CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s), CompuBench 1.5 Desktop - T-Rex (Frames/s), CompuBench 1.5 Desktop - Video Composition (Frames/s), CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s), GFXBench 4.0 - Car Chase Offscreen (Frames), GFXBench 4.0 - Manhattan (Frames), GFXBench 4.0 - T-Rex (Frames), GFXBench 4.0 - Car Chase Offscreen (Fps), GFXBench 4.0 - Manhattan (Fps), GFXBench 4.0 - T-Rex (Fps).

Intel Core i5-9400T

Intel Core i5-8400

Differences

Reasons to consider the Intel Core i5-9400T

CPU is newer: launch date 1 year(s) 7 month(s) later
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 86% lower typical power consumption: 35 Watt vs 65 Watt

Launch date	September 2018 vs 5 January 2017
L1 cache	64K (per core) vs 256 KB
L2 cache	256K (per core) vs 1 MB
Thermal Design Power (TDP)	35 Watt vs 65 Watt

Reasons to consider the Intel Core i5-8400

Around 122% higher clock speed: 4.00 GHz vs 1.8 GHz
Around 13% better performance in PassMark - Single thread mark: 2382 vs 2114
Around 11% better performance in PassMark - CPU mark: 9238 vs 8348

Specifications (specs)
Maximum frequency	4.00 GHz vs 1.8 GHz
Benchmarks
PassMark - Single thread mark	2382 vs 2114
PassMark - CPU mark	9238 vs 8348

Compare benchmarks

CPU 1: Intel Core i5-9400T
CPU 2: Intel Core i5-8400

PassMark - Single thread mark

CPU 1

CPU 2

2114

2382

PassMark - CPU mark

CPU 1

CPU 2

8348

9238

Name	Intel Core i5-9400T	Intel Core i5-8400
PassMark - Single thread mark	2114	2382
PassMark - CPU mark	8348	9238
Geekbench 4 - Single Core		1048
Geekbench 4 - Multi-Core		4580
3DMark Fire Strike - Physics Score		3633
CompuBench 1.5 Desktop - Face Detection (mPixels/s)		5.68
CompuBench 1.5 Desktop - Ocean Surface Simulation (Frames/s)		73.097
CompuBench 1.5 Desktop - T-Rex (Frames/s)		0.752
CompuBench 1.5 Desktop - Video Composition (Frames/s)		3.767
CompuBench 1.5 Desktop - Bitcoin Mining (mHash/s)		10.333
GFXBench 4.0 - Car Chase Offscreen (Frames)		1826
GFXBench 4.0 - Manhattan (Frames)		3900
GFXBench 4.0 - T-Rex (Frames)		6201
GFXBench 4.0 - Car Chase Offscreen (Fps)		1826
GFXBench 4.0 - Manhattan (Fps)		3900
GFXBench 4.0 - T-Rex (Fps)		6201

Compare specifications (specs)

	Intel Core i5-9400T	Intel Core i5-8400
Essentials
Architecture codename	Coffee Lake	Coffee Lake
Launch date	September 2018	5 January 2017
Place in performance rating	1151	1144
Vertical segment	Desktop	Desktop
Launch price (MSRP)		$190
Price now		$259
Processor Number		i5-8400
Series		8th Generation Intel® Core™ i5 Processors
Status		Launched
Value for money (0-100)		13.28
Performance
64 bit support
L1 cache	64K (per core)	256 KB
L2 cache	256K (per core)	1 MB
L3 cache	9 MB (shared)	9 MB
Manufacturing process technology	14 nm	14 nm
Maximum case temperature (TCase)	72 °C	72 °C
Maximum frequency	1.8 GHz	4.00 GHz
Number of cores	6	6
Base frequency		2.80 GHz
Bus Speed		8 GT/s DMI3
Maximum core temperature		100°C
Number of threads		6
Memory
Supported memory types	DDR4	DDR4-2666
Max memory channels		2
Maximum memory bandwidth		41.6 GB/s
Maximum memory size		128 GB
Compatibility
Max number of CPUs in a configuration	1	1
Thermal Design Power (TDP)	35 Watt	65 Watt
Low Halogen Options Available
Package Size		37.5mm x 37.5mm
Sockets supported		FCLGA1151
Thermal Solution		PCG 2015C (65W)
Security & Reliability
Intel® Trusted Execution technology (TXT)
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)
Secure Boot
Advanced Technologies
Intel® Advanced Vector Extensions (AVX)
Intel® AES New Instructions
Enhanced Intel SpeedStep® technology
Idle States
Instruction set extensions		Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
Intel 64
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)
AMD Virtualization (AMD-V™)
Intel® VT-x with Extended Page Tables (EPT)
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
Peripherals
Max number of PCIe lanes		16
PCI Express revision		3.0
PCIe configurations		Up to 1x16, 2x8, 1x8+2x4
Scalability		1S Only