Athlon II X2 255 vs i5-8400

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Aggregate performance score

Core i5-8400
2017
6 cores / 6 threads, 65 Watt
5.81
+685%
Athlon II X2 255
2010
2 cores / 2 threads, 65 Watt
0.74

Core i5-8400 outperforms Athlon II X2 255 by a whopping 685% based on our aggregate benchmark results.

Primary details

Comparing Core i5-8400 and Athlon II X2 255 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking11292680
Place by popularity63not in top-100
Cost-effectiveness evaluation4.920.02
Market segmentDesktop processorDesktop processor
SeriesIntel Core i5no data
Power efficiency8.461.08
Architecture codenameCoffee Lake-S (2017−2018)Regor (2009−2013)
Release date5 October 2017 (7 years ago)25 January 2010 (14 years ago)
Launch price (MSRP)$182$60

Cost-effectiveness evaluation

Performance per price, higher is better.

i5-8400 has 24500% better value for money than Athlon II X2 255.

Detailed specifications

Core i5-8400 and Athlon II X2 255 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)2 (Dual-core)
Threads62
Base clock speed2.8 GHz3.1 GHz
Boost clock speed4 GHz3.1 GHz
Bus typeDMI 3.0no data
Bus rate4 × 8 GT/sno data
Multiplier28no data
L1 cache64K (per core)128 KB
L2 cache256K (per core)1 MB
L3 cache9 MB (shared)0 KB
Chip lithography14 nm45 nm
Die size149 mm2117 mm2
Maximum core temperature100 °Cno data
Maximum case temperature (TCase)72 °Cno data
Number of transistorsno data410 million
64 bit support++
Windows 11 compatibility+-

Compatibility

Information on Core i5-8400 and Athlon II X2 255 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
SocketFCLGA1151AM3
Power consumption (TDP)65 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-8400 and Athlon II X2 255. 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 Athlon II X2 255 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 Athlon II X2 255 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 Athlon II X2 255. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3, DDR4DDR3
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 Athlon II X2 255 integrated GPUs.

Number of displays supported3no data

Graphics image quality

Maximum display resolutions supported by Core i5-8400 and Athlon II X2 255 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 Athlon II X2 255 integrated GPUs, sometimes API versions are included.

DirectX12no data
OpenGL4.5no data

Peripherals

Specifications and connection of peripherals supported by Core i5-8400 and Athlon II X2 255.

PCIe version3.02.0
PCI Express lanes16no data

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


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.

i5-8400 5.81
+685%
Athlon II X2 255 0.74

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

i5-8400 9234
+686%
Athlon II X2 255 1175

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

i5-8400 1373
+369%
Athlon II X2 255 293

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

i5-8400 4810
+1094%
Athlon II X2 255 403

Gaming performance

Pros & cons summary


Performance score 5.81 0.74
Recency 5 October 2017 25 January 2010
Physical cores 6 2
Threads 6 2
Chip lithography 14 nm 45 nm

i5-8400 has a 685.1% higher aggregate performance score, an age advantage of 7 years, 200% more physical cores and 200% more threads, and a 221.4% more advanced lithography process.

The Core i5-8400 is our recommended choice as it beats the Athlon II X2 255 in performance tests.


Should you still have questions on choice between Core i5-8400 and Athlon II X2 255, ask them in Comments section, and we shall answer.

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Intel Core i5-8400
Core i5-8400
AMD Athlon II X2 255
Athlon II X2 255

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Community ratings

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Questions & comments

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