Pentium III 800 vs i5-8400

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Primary details

Comparing Core i5-8400 and Pentium III 800 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking1107not rated
Place by popularity69not in top-100
Cost-effectiveness evaluation5.21no data
Market segmentDesktop processorDesktop processor
SeriesIntel Core i5no data
Power efficiency8.47no data
Architecture codenameCoffee Lake-S (2017−2018)Coppermine T (2000)
Release date24 September 2017 (7 years ago)no data (2024 years ago)
Launch price (MSRP)$182no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Core i5-8400 and Pentium III 800 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 cores6 (Hexa-Core)1 (Single-Core)
Threads6no data
Base clock speed2.8 GHzno data
Boost clock speed4 GHz0.8 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/sno data
Multiplier28no data
L1 cache384 KB8 KB
L2 cache1.5 MB256 KB
L3 cache9 MB (shared)0 KB
Chip lithography14 nm180 nm
Die size149 mm280 mm2
Maximum core temperature100 °Cno data
Maximum case temperature (TCase)72 °C69 °C
Number of transistorsno data44 million
64 bit support+-
Windows 11 compatibility+-

Compatibility

Information on Core i5-8400 and Pentium III 800 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 configuration1 (Uniprocessor)1
SocketFCLGA1151370
Power consumption (TDP)65 Watt38 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-8400 and Pentium III 800. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2, Intel® AVX2no data
AES-NI+-
AVX+-
vPro+no data
Enhanced SpeedStep (EIST)+no data
Turbo Boost Technology2.0no data
Hyper-Threading Technology-no data
Idle States+no data
Thermal Monitoring+-

Security technologies

Core i5-8400 and Pentium III 800 technologies aimed at improving security, for example, by protecting against hacks.

TXT-no data
EDB+no data
Secure Key+no data
MPX+-
Identity Protection+-
SGXYes with Intel® MEno data
OS Guard+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i5-8400 and Pentium III 800 are enumerated here.

AMD-V+-
VT-d+no data
VT-x+no data
EPT+no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-8400 and Pentium III 800. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3, DDR4no data
Maximum memory size128 GBno data
Max memory channels2no data
Maximum memory bandwidth42.671 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardIntel UHD Graphics 630no data
Max video memory64 GBno data
Quick Sync Video+-
Clear Video+no data
Clear Video HD+no data
Graphics max frequency1.05 GHzno data
InTru 3D+no data

Graphics interfaces

Available interfaces and connections of Core i5-8400 and Pentium III 800 integrated GPUs.

Number of displays supported3no data

Graphics image quality

Maximum display resolutions supported by Core i5-8400 and Pentium III 800 integrated GPUs, including resolutions over different interfaces.

4K resolution support+no data
Max resolution over HDMI 1.44096x2304@24Hzno data
Max resolution over eDP4096x2304@60Hzno data
Max resolution over DisplayPort4096x2304@60Hzno data

Graphics API support

APIs supported by Core i5-8400 and Pentium III 800 integrated GPUs, sometimes API versions are included.

DirectX12no data
OpenGL4.5no data

Peripherals

Specifications and connection of peripherals supported by Core i5-8400 and Pentium III 800.

PCIe version3.0no data
PCI Express lanes16no data

Pros & cons summary


Physical cores 6 1
Chip lithography 14 nm 180 nm
Power consumption (TDP) 65 Watt 38 Watt

i5-8400 has 500% more physical cores, and a 1185.7% more advanced lithography process.

Pentium III 800, on the other hand, has 71.1% lower power consumption.

We couldn't decide between Core i5-8400 and Pentium III 800. We've got no test results to judge.


Should you still have questions on choice between Core i5-8400 and Pentium III 800, ask them in Comments section, and we shall answer.

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Intel Core i5-8400
Core i5-8400
Intel Pentium III  800
Pentium III 800

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Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


3.9 2644 votes

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3.6 63 votes

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Questions & comments

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