AMD Athlon II X2 255 vs Phenom II X2 B55

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Combined performance score

Phenom II X2 B55
0.77
+1.3%

Phenom II X2 B55 outperforms Athlon II X2 255 by 1% in our combined benchmark results.

General info

Comparing Phenom II X2 B55 and Athlon II X2 255 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking24972506
Place by popularitynot in top-100not in top-100
Value for money2.020.02
Market segmentDesktop processorDesktop processor
Architecture codenameCallisto (2009−2010)Regor (2009−2013)
Release dateOctober 2009 (14 years old)25 January 2010 (14 years old)
Launch price (MSRP)$48$60
Current price$23 (0.5x MSRP)$57 (1x MSRP)
Value for money

Performance per price, higher is better.

Phenom II X2 B55 has 10000% better value for money than Athlon II X2 255.

Technical specs

Phenom II X2 B55 and Athlon II X2 255 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 speedno data3.1 GHz
Boost clock speed3 GHz3.1 GHz
L1 cache128 KB (per core)128 KB
L2 cache512 KB (per core)1 MB
L3 cache6 MB (shared)0 KB
Chip lithography45 nm45 nm
Die size258 mm2117 mm2
Number of transistors758 million410 million
64 bit support++
Windows 11 compatibility--
Unlocked multiplierNoNo

Compatibility

Information on Phenom II X2 B55 and Athlon II X2 255 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
SocketAM3AM3
Power consumption (TDP)80 Watt65 Watt

Memory specs

Types, maximum amount and channel quantity of RAM supported by Phenom II X2 B55 and Athlon II X2 255. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR3

Peripherals

Specifications and connection of peripherals supported by Phenom II X2 B55 and Athlon II X2 255.

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.

Phenom II X2 B55 0.77
+1.3%
Athlon II X2 255 0.76

Phenom II X2 B55 outperforms Athlon II X2 255 by 1% in our combined benchmark results.


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.

Benchmark coverage: 68%

Phenom II X2 B55 1183
+1.1%
Athlon II X2 255 1170

Phenom II X2 B55 outperforms Athlon II X2 255 by 1% in Passmark.

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.

Benchmark coverage: 42%

Phenom II X2 B55 383
+4.9%
Athlon II X2 255 365

Phenom II X2 B55 outperforms Athlon II X2 255 by 5% in GeekBench 5 Single-Core.

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.

Benchmark coverage: 42%

Phenom II X2 B55 687
+0.9%
Athlon II X2 255 681

Phenom II X2 B55 outperforms Athlon II X2 255 by 1% in GeekBench 5 Multi-Core.

Gaming performance

Advantages and disadvantages


Performance score 0.77 0.76
Cost $48 $60
Power consumption (TDP) 80 Watt 65 Watt

We couldn't decide between Phenom II X2 B55 and Athlon II X2 255. The differences in performance seem too small.


Should you still have questions on choice between Phenom II X2 B55 and Athlon II X2 255, ask them in Comments section, and we shall answer.

User ratings

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.


AMD Phenom II X2 B55
Phenom II X2 B55
AMD Athlon II X2 255
Athlon II X2 255

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User ratings: view and submit

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3.9 31 vote

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3.4 150 votes

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Questions and comments

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