Atom N455 vs Pentium G840

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Aggregate performance score

Pentium G840
2011
2 cores / 2 threads, 65 Watt
0.81
+575%
Atom N455
2010
1 core / 2 threads, 6 Watt
0.12

Pentium G840 outperforms Atom N455 by a whopping 575% based on our aggregate benchmark results.

Primary details

Comparing Pentium G840 and Atom N455 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking26043352
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation4.61no data
Market segmentDesktop processorLaptop
Seriesno dataIntel Atom
Power efficiency1.181.62
Architecture codenameSandy Bridge (2011−2013)Pinetrail (2009−2011)
Release date22 May 2011 (13 years ago)1 June 2010 (14 years ago)
Launch price (MSRP)$60$64

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Pentium G840 and Atom N455 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 cores2 (Dual-core)1 (Single-Core)
Threads22
Base clock speed2.8 GHz1.66 GHz
Boost clock speed2.8 GHz1.67 GHz
Bus rateno data533 MHz
L1 cache64 KB (per core)64 KB (per core)
L2 cache256 KB (per core)512K (per core)
L3 cache3 MB (shared)0 KB
Chip lithography32 nm45 nm
Die size131 mm266 mm2
Maximum core temperature69 °C100 °C
Number of transistors504 million123 million
64 bit support++
Windows 11 compatibility--

Compatibility

Information on Pentium G840 and Atom N455 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 configuration11
SocketFCLGA1155FCBGA559
Power consumption (TDP)65 Watt6.5 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium G840 and Atom N455. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.1, Intel® SSE4.2Intel® SSE2, Intel® SSE3, Intel® SSSE3
AES-NI+-
AVX+-
Enhanced SpeedStep (EIST)++
Turbo Boost Technology--
Hyper-Threading Technology-+
Idle States+no data
Thermal Monitoring++
Flex Memory Access+no data
Demand Based Switchingno data-
FDI+no data
Fast Memory Access+no data

Security technologies

Pentium G840 and Atom N455 technologies aimed at improving security, for example, by protecting against hacks.

TXT--
EDB++

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium G840 and Atom N455 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium G840 and Atom N455. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR3
Maximum memory size32 GB2 GB
Max memory channels21
Maximum memory bandwidth21 GB/sno data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card
Compare
Intel HD Graphics for 2nd Generation Intel ProcessorsIntel GMA 3150
Graphics max frequency1.1 GHzno data

Graphics interfaces

Available interfaces and connections of Pentium G840 and Atom N455 integrated GPUs.

Number of displays supported2no data

Peripherals

Specifications and connection of peripherals supported by Pentium G840 and Atom N455.

PCIe version2.0no 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.

Pentium G840 0.81
+575%
Atom N455 0.12

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.

Pentium G840 1294
+560%
Atom N455 196

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.

Pentium G840 452
+753%
Atom N455 53

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.

Pentium G840 789
+886%
Atom N455 80

Gaming performance

Pros & cons summary


Performance score 0.81 0.12
Integrated graphics card 0.77 0.01
Recency 22 May 2011 1 June 2010
Physical cores 2 1
Chip lithography 32 nm 45 nm
Power consumption (TDP) 65 Watt 6 Watt

Pentium G840 has a 575% higher aggregate performance score, 7600% faster integrated GPU, an age advantage of 11 months, 100% more physical cores, and a 40.6% more advanced lithography process.

Atom N455, on the other hand, has 983.3% lower power consumption.

The Pentium G840 is our recommended choice as it beats the Atom N455 in performance tests.

Note that Pentium G840 is a desktop processor while Atom N455 is a notebook one.


Should you still have questions on choice between Pentium G840 and Atom N455, ask them in Comments section, and we shall answer.

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Intel Pentium G840
Pentium G840
Intel Atom N455
Atom N455

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Community ratings

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Questions & comments

Here you can ask a question about Pentium G840 or Atom N455, agree or disagree with our judgements, or report an error or mismatch.