Pentium G840 vs Phenom II X3 P820

Aggregate performance score

Phenom II X3 P820
2010
3 cores / 3 threads, 25 Watt
0.66
Pentium G840
2011
2 cores / 2 threads, 65 Watt
0.80
+21.2%

Pentium G840 outperforms Phenom II X3 P820 by a significant 21% based on our aggregate benchmark results.

Primary details

Comparing Phenom II X3 P820 and Pentium G840 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking27402606
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluationno data4.61
Market segmentLaptopDesktop processor
Series3x AMD Phenom IIno data
Power efficiency2.501.16
Architecture codenameChamplain (2010−2011)Sandy Bridge (2011−2013)
Release date12 May 2010 (14 years ago)22 May 2011 (13 years ago)
Launch price (MSRP)no data$60

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Phenom II X3 P820 and Pentium G840 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 data2.8 GHz
Boost clock speed1.8 GHz2.8 GHz
Bus rate3600 MHzno data
L1 cache384 KB64 KB (per core)
L2 cache1.5 MB256 KB (per core)
L3 cacheno data3 MB (shared)
Chip lithography45 nm32 nm
Die sizeno data131 mm2
Maximum core temperatureno data69 °C
Number of transistorsno data504 million
64 bit support++
Windows 11 compatibility--

Compatibility

Information on Phenom II X3 P820 and Pentium G840 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
SocketS1FCLGA1155
Power consumption (TDP)25 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Phenom II X3 P820 and Pentium G840. 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-+
AVX-+
VirusProtect+-
Enhanced SpeedStep (EIST)no data+
Turbo Boost Technologyno data-
Hyper-Threading Technologyno data-
Idle Statesno data+
Thermal Monitoring-+
Flex Memory Accessno data+
FDIno data+
Fast Memory Accessno data+

Security technologies

Phenom II X3 P820 and Pentium G840 technologies aimed at improving security, for example, by protecting against hacks.

TXTno data-
EDBno data+

Virtualization technologies

Virtual machine speed-up technologies supported by Phenom II X3 P820 and Pentium G840 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 P820 and Pentium G840. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR3
Maximum memory sizeno data32 GB
Max memory channelsno data2
Maximum memory bandwidthno data21 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataIntel® HD Graphics for 2nd Generation Intel® Processors
Graphics max frequencyno data1.1 GHz

Graphics interfaces

Available interfaces and connections of Phenom II X3 P820 and Pentium G840 integrated GPUs.

Number of displays supportedno data2

Peripherals

Specifications and connection of peripherals supported by Phenom II X3 P820 and Pentium G840.

PCIe versionno data2.0

Gaming performance

Pros & cons summary


Performance score 0.66 0.80
Recency 12 May 2010 22 May 2011
Physical cores 3 2
Threads 3 2
Chip lithography 45 nm 32 nm
Power consumption (TDP) 25 Watt 65 Watt

Phenom II X3 P820 has 50% more physical cores and 50% more threads, and 160% lower power consumption.

Pentium G840, on the other hand, has a 21.2% higher aggregate performance score, an age advantage of 1 year, and a 40.6% more advanced lithography process.

The Pentium G840 is our recommended choice as it beats the Phenom II X3 P820 in performance tests.

Be aware that Phenom II X3 P820 is a notebook processor while Pentium G840 is a desktop one.


Should you still have questions on choice between Phenom II X3 P820 and Pentium G840, ask them in Comments section, and we shall answer.

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AMD Phenom II X3 P820
Phenom II X3 P820
Intel Pentium G840
Pentium G840

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Community ratings

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