Celeron 3855U vs Phenom II X3 P840

Aggregate performance score

Phenom II X3 P840
2010
3 cores / 3 threads, 25 Watt
0.82
+6.5%
Celeron 3855U
2015
2 cores / 2 threads, 15 Watt
0.77

Phenom II X3 P840 outperforms Celeron 3855U by a small 6% based on our aggregate benchmark results.

Primary details

Comparing Phenom II X3 P840 and Celeron 3855U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking25822636
Place by popularitynot in top-100not in top-100
Market segmentLaptopLaptop
Series3x AMD Phenom IIIntel Celeron
Power efficiency3.104.86
Architecture codenameChamplain (2010−2011)Skylake (2015−2016)
Release date4 October 2010 (14 years ago)15 August 2015 (9 years ago)
Launch price (MSRP)no data$107

Detailed specifications

Phenom II X3 P840 and Celeron 3855U 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 cores3 (Tri-Core)2 (Dual-core)
Threads32
Base clock speedno data1.6 GHz
Boost clock speed1.9 GHz1.6 GHz
Bus typeno dataOPI
Bus rate3600 MHz4 GT/s
Multiplierno data16
L1 cache384 KB128 KB
L2 cache1.5 MB512 KB
L3 cacheno data2 MB
Chip lithography45 nm14 nm
Die sizeno data98.57 mm2
Maximum core temperatureno data100 °C
Number of transistorsno data1750 Million
64 bit support++
Windows 11 compatibility--

Compatibility

Information on Phenom II X3 P840 and Celeron 3855U 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 configurationno data1 (Uniprocessor)
SocketS1FCBGA1356
Power consumption (TDP)25 Watt15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Phenom II X3 P840 and Celeron 3855U. You'll probably need this information if you require some particular technology.

Instruction set extensionsVirtualization, AMD64, Advanced Virus Protection, SSE(1,2,3,4a)Intel® SSE4.1, Intel® SSE4.2
AES-NI-+
VirusProtect+-
Enhanced SpeedStep (EIST)no data+
My WiFino data+
Turbo Boost Technologyno data-
Hyper-Threading Technologyno data-
Idle Statesno data+
Thermal Monitoring-+
Flex Memory Accessno data+
Smart Responseno data+

Security technologies

Phenom II X3 P840 and Celeron 3855U technologies aimed at improving security, for example, by protecting against hacks.

TXTno data-
EDBno data+
Secure Keyno data+
Identity Protection-+
SGXno dataYes with Intel® ME
OS Guardno data-

Virtualization technologies

Virtual machine speed-up technologies supported by Phenom II X3 P840 and Celeron 3855U are enumerated here.

AMD-V+-
VT-dno data+
VT-xno data+
EPTno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Phenom II X3 P840 and Celeron 3855U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR4-1866/2133, LPDDR3-1600/1866, DDR3L-1333/1600
Maximum memory sizeno data32 GB
Max memory channelsno data2
Maximum memory bandwidthno data34.134 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataIntel HD Graphics 510
Max video memoryno data32 GB
Quick Sync Video-+
Clear Video HDno data+
Graphics max frequencyno data900 MHz

Graphics interfaces

Available interfaces and connections of Phenom II X3 P840 and Celeron 3855U integrated GPUs.

Number of displays supportedno data3
eDPno data+
DisplayPort-+
HDMI-+
DVIno data+

Graphics image quality

Maximum display resolutions supported by Phenom II X3 P840 and Celeron 3855U 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
Max resolution over VGAno dataN/A

Graphics API support

APIs supported by Phenom II X3 P840 and Celeron 3855U integrated GPUs, sometimes API versions are included.

DirectXno data12
OpenGLno data4.4

Peripherals

Specifications and connection of peripherals supported by Phenom II X3 P840 and Celeron 3855U.

PCIe versionno data2.0
PCI Express lanesno data10

Gaming performance

Pros & cons summary


Performance score 0.82 0.77
Recency 4 October 2010 15 August 2015
Physical cores 3 2
Threads 3 2
Chip lithography 45 nm 14 nm
Power consumption (TDP) 25 Watt 15 Watt

Phenom II X3 P840 has a 6.5% higher aggregate performance score, and 50% more physical cores and 50% more threads.

Celeron 3855U, on the other hand, has an age advantage of 4 years, a 221.4% more advanced lithography process, and 66.7% lower power consumption.

Given the minimal performance differences, no clear winner can be declared between Phenom II X3 P840 and Celeron 3855U.


Should you still have questions on choice between Phenom II X3 P840 and Celeron 3855U, ask them in Comments section, and we shall answer.

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AMD Phenom II X3 P840
Phenom II X3 P840
Intel Celeron 3855U
Celeron 3855U

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