Phenom II X2 B55 vs Pentium D 820

Aggregate performance score

Pentium D 820
2005
2 cores / 2 threads, 95 Watt
0.31
Phenom II X2 B55
2009
2 cores / 2 threads, 80 Watt
0.74
+139%

Phenom II X2 B55 outperforms Pentium D 820 by a whopping 139% based on our aggregate benchmark results.

Primary details

Comparing Pentium D 820 and Phenom II X2 B55 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking30842657
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluationno data2.02
Market segmentDesktop processorDesktop processor
SeriesPentium Dno data
Power efficiency0.310.88
Architecture codenameSmithfield (2005)Callisto (2009−2010)
Release dateMay 2005 (19 years ago)1 October 2009 (15 years ago)
Launch price (MSRP)no data$48

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Pentium D 820 and Phenom II X2 B55 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 speed2.8 GHz3 GHz
Boost clock speed2.8 GHz3 GHz
Bus rate800 MHzno data
L1 cache28 KB128 KB (per core)
L2 cache2 MB512 KB (per core)
L3 cache0 KB6 MB (shared)
Chip lithography90 nm45 nm
Die size206 mm2258 mm2
Maximum core temperature64 °Cno data
Number of transistors169 million758 million
64 bit support++
Windows 11 compatibility--
VID voltage range1.2V-1.4Vno data

Compatibility

Information on Pentium D 820 and Phenom II X2 B55 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 configuration21
SocketPLGA775AM3
Power consumption (TDP)95 Watt80 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium D 820 and Phenom II X2 B55. You'll probably need this information if you require some particular technology.

Enhanced SpeedStep (EIST)-no data
Turbo Boost Technology-no data
Hyper-Threading Technology-no data
Idle States+no data
Demand Based Switching-no data
PAE32 Bitno data
FSB parity-no data

Security technologies

Pentium D 820 and Phenom II X2 B55 technologies aimed at improving security, for example, by protecting against hacks.

TXT-no data
EDB+no data

Virtualization technologies

Virtual machine speed-up technologies supported by Pentium D 820 and Phenom II X2 B55 are enumerated here.

AMD-V-+
VT-d-no data
VT-x-no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium D 820 and Phenom II X2 B55. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR1, DDR2, DDR3DDR3

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataOn certain motherboards (Chipset feature)

Peripherals

Specifications and connection of peripherals supported by Pentium D 820 and Phenom II X2 B55.

PCIe versionno data2.0

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 D 820 0.31
Phenom II X2 B55 0.74
+139%

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 D 820 499
Phenom II X2 B55 1183
+137%

Gaming performance

Pros & cons summary


Performance score 0.31 0.74
Chip lithography 90 nm 45 nm
Power consumption (TDP) 95 Watt 80 Watt

Phenom II X2 B55 has a 138.7% higher aggregate performance score, a 100% more advanced lithography process, and 18.8% lower power consumption.

The Phenom II X2 B55 is our recommended choice as it beats the Pentium D 820 in performance tests.


Should you still have questions on choice between Pentium D 820 and Phenom II X2 B55, ask them in Comments section, and we shall answer.

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Intel Pentium D 820
Pentium D 820
AMD Phenom II X2 B55
Phenom II X2 B55

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Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


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Questions & comments

Here you can ask a question about Pentium D 820 or Phenom II X2 B55, agree or disagree with our judgements, or report an error or mismatch.