Intel Core i7-7800X vs Intel Core i5-8400

Comparative analysis of Intel Core i7-7800X and Intel Core i5-8400 processors for all known characteristics in the following categories: Essentials, Performance, Memory, Compatibility, Peripherals, Security & Reliability, Advanced Technologies, Virtualization, Graphics, Graphics interfaces, Graphics image quality, Graphics API support. 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).

 

Differences

Reasons to consider the Intel Core i7-7800X

  • CPU is newer: launch date 4 month(s) later
  • Processor is unlocked, an unlocked multiplier allows for easier overclocking
  • 6 more threads: 12 vs 6
  • 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 39% better performance in PassMark - CPU mark: 12872 vs 9237
  • Around 6% better performance in Geekbench 4 - Single Core: 1109 vs 1048
  • Around 45% better performance in Geekbench 4 - Multi-Core: 6640 vs 4580
  • Around 80% better performance in 3DMark Fire Strike - Physics Score: 6534 vs 3633
Specifications (specs)
Launch date June 2017 vs 5 January 2017
Unlocked Unlocked vs Locked
Number of threads 12 vs 6
L1 cache 64 KB (per core) vs 256 KB
L2 cache 256 KB (per core) vs 1 MB
Benchmarks
PassMark - Single thread mark 2389 vs 2381
PassMark - CPU mark 12872 vs 9237
Geekbench 4 - Single Core 1109 vs 1048
Geekbench 4 - Multi-Core 6640 vs 4580
3DMark Fire Strike - Physics Score 6534 vs 3633

Reasons to consider the Intel Core i5-8400

  • Around 9% more L3 cache; more data can be stored in the L3 cache for quick access later
  • 2.2x lower typical power consumption: 65 Watt vs 140 Watt
L3 cache 9 MB vs 8448 KB (shared)
Thermal Design Power (TDP) 65 Watt vs 140 Watt

Compare benchmarks

CPU 1: Intel Core i7-7800X
CPU 2: Intel Core i5-8400

PassMark - Single thread mark
CPU 1
CPU 2
2389
2381
PassMark - CPU mark
CPU 1
CPU 2
12872
9237
Geekbench 4 - Single Core
CPU 1
CPU 2
1109
1048
Geekbench 4 - Multi-Core
CPU 1
CPU 2
6640
4580
3DMark Fire Strike - Physics Score
CPU 1
CPU 2
6534
3633
Name Intel Core i7-7800X Intel Core i5-8400
PassMark - Single thread mark 2389 2381
PassMark - CPU mark 12872 9237
Geekbench 4 - Single Core 1109 1048
Geekbench 4 - Multi-Core 6640 4580
3DMark Fire Strike - Physics Score 6534 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 i7-7800X Intel Core i5-8400

Essentials

Architecture codename Skylake Coffee Lake
Launch date June 2017 5 January 2017
Launch price (MSRP) $416 $190
Place in performance rating 1153 1144
Price now $378.99 $259
Processor Number i7-7800X i5-8400
Series Intel® Core™ X-series Processors 8th Generation Intel® Core™ i5 Processors
Status Launched Launched
Value for money (0-100) 11.29 13.28
Vertical segment Desktop Desktop

Performance

64 bit support
Base frequency 3.50 GHz 2.80 GHz
Bus Speed 8 GT/s DMI3 8 GT/s DMI3
L1 cache 64 KB (per core) 256 KB
L2 cache 256 KB (per core) 1 MB
L3 cache 8448 KB (shared) 9 MB
Manufacturing process technology 14 nm 14 nm
Maximum case temperature (TCase) 72 °C 72 °C
Maximum core temperature 100°C 100°C
Maximum frequency 4.00 GHz 4.00 GHz
Number of cores 6 6
Number of QPI Links 0
Number of threads 12 6
Unlocked

Memory

Max memory channels 4 2
Maximum memory size 128 GB 128 GB
Supported memory types DDR4-2400 DDR4-2666
Maximum memory bandwidth 41.6 GB/s

Compatibility

Low Halogen Options Available
Max number of CPUs in a configuration 1 1
Sockets supported FCLGA2066 FCLGA1151
Thermal Design Power (TDP) 140 Watt 65 Watt
Thermal Solution PCG 2017X PCG 2015C (65W)
Package Size 37.5mm x 37.5mm

Peripherals

Max number of PCIe lanes 28 16
PCI Express revision 3.0 3.0
Scalability 1S Only 1S Only
PCIe configurations Up to 1x16, 2x8, 1x8+2x4

Security & Reliability

Execute Disable Bit (EDB)
Intel® Trusted Execution technology (TXT)
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

Enhanced Intel SpeedStep® technology
Instruction set extensions Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512 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® Turbo Boost technology
Number of AVX-512 FMA Units 2
Idle States
Intel® Stable Image Platform Program (SIPP)
Intel® TSX-NI
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