Celeron 4205U vs B840

Aggregate performance score

Celeron B840
2011
2 cores / 2 threads, 35 Watt
0.62
Celeron 4205U
2019
2 cores / 2 threads, 15 Watt
0.88
+41.9%

Celeron 4205U outperforms Celeron B840 by a considerable 42% based on our aggregate benchmark results.

Primary details

Comparing Celeron B840 and Celeron 4205U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking27852554
Place by popularitynot in top-100not in top-100
Market segmentLaptopLaptop
SeriesIntel CeleronIntel Celeron
Power efficiency1.655.45
Architecture codenameSandy Bridge (2011−2013)Whiskey Lake-U (2018−2019)
Release date1 July 2011 (13 years ago)23 January 2019 (5 years ago)
Launch price (MSRP)$86$107

Detailed specifications

Celeron B840 and Celeron 4205U 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)2 (Dual-core)
Threads22
Base clock speed1.9 GHz1.8 GHz
Boost clock speed1.9 GHz1.8 GHz
Bus typeDMI 2.0OPI
Bus rate4 × 5 GT/s4 GT/s
Multiplier1918
L1 cache128 KB128 KB
L2 cache512 KB512 KB
L3 cache2 MB (shared)2 MB (shared)
Chip lithography32 nm14 nm
Die size131 mm2no data
Maximum core temperature100 °C100 °C
Number of transistors504 millionno data
64 bit support++
Windows 11 compatibility-+

Compatibility

Information on Celeron B840 and Celeron 4205U 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 (Uniprocessor)
SocketFCPGA988,PGA988FCBGA1528
Power consumption (TDP)35 Watt15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Celeron B840 and Celeron 4205U. You'll probably need this information if you require some particular technology.

Instruction set extensionsno dataIntel® SSE4.1, Intel® SSE4.2
AES-NI-+
FMA+-
Enhanced SpeedStep (EIST)++
Speed Shiftno data+
My WiFi++
Turbo Boost Technology--
Hyper-Threading Technology--
Idle States++
Thermal Monitoring++
Flex Memory Access++
Smart Responseno data+
Demand Based Switching-no data
FDI+no data
Fast Memory Access+no data

Security technologies

Celeron B840 and Celeron 4205U technologies aimed at improving security, for example, by protecting against hacks.

TXT--
EDB++
Secure Keyno data+
Identity Protection-+
SGXno dataYes with Intel® ME
OS Guardno data+
Anti-Theft-no data

Virtualization technologies

Virtual machine speed-up technologies supported by Celeron B840 and Celeron 4205U are enumerated here.

VT-d-+
VT-x++
EPTno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Celeron B840 and Celeron 4205U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR3, DDR4
Maximum memory size16 GB64 GB
Max memory channels22
Maximum memory bandwidth21.335 GB/s38.397 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardIntel® HD Graphics for 2nd Generation Intel® ProcessorsIntel® UHD Graphics for 8th Generation Intel® Processors
Max video memoryno data32 GB
Quick Sync Video-+
Clear Videono data+
Clear Video HD-+
Graphics max frequency1 GHz900 MHz

Graphics interfaces

Available interfaces and connections of Celeron B840 and Celeron 4205U integrated GPUs.

Number of displays supported23
eDP++
DisplayPort++
HDMI++
DVIno data+
SDVO+no data
CRT+no data

Graphics image quality

Maximum display resolutions supported by Celeron B840 and Celeron 4205U integrated GPUs, including resolutions over different interfaces.

4K resolution supportno data+
Max resolution over HDMI 1.4no data4096x2304@24Hz
Max resolution over eDPno data4096x2304@60Hz
Max resolution over DisplayPortno data4096x2304@60Hz

Graphics API support

APIs supported by Celeron B840 and Celeron 4205U integrated GPUs, sometimes API versions are included.

DirectXno data12
OpenGLno data4.5

Peripherals

Specifications and connection of peripherals supported by Celeron B840 and Celeron 4205U.

PCIe version2.02.0
PCI Express lanes1612

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.

Celeron B840 0.62
Celeron 4205U 0.88
+41.9%

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.

Celeron B840 967
Celeron 4205U 1367
+41.4%

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.

Celeron B840 328
Celeron 4205U 355
+8.2%

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.

Celeron B840 597
Celeron 4205U 598
+0.2%

Gaming performance

Pros & cons summary


Performance score 0.62 0.88
Recency 1 July 2011 23 January 2019
Chip lithography 32 nm 14 nm
Power consumption (TDP) 35 Watt 15 Watt

Celeron 4205U has a 41.9% higher aggregate performance score, an age advantage of 7 years, a 128.6% more advanced lithography process, and 133.3% lower power consumption.

The Celeron 4205U is our recommended choice as it beats the Celeron B840 in performance tests.


Should you still have questions on choice between Celeron B840 and Celeron 4205U, ask them in Comments section, and we shall answer.

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Intel Celeron B840
Celeron B840
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Celeron 4205U

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Community ratings

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