Phenom II X2 B57 vs Athlon II X4 645

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Aggregate performance score

Athlon II X4 645
2010
4 cores / 4 threads, 95 Watt
1.48
+87.3%
Phenom II X2 B57
2010
2 cores / 2 threads, 80 Watt
0.79

Athlon II X4 645 outperforms Phenom II X2 B57 by an impressive 87% based on our aggregate benchmark results.

Primary details

Comparing Athlon II X4 645 and Phenom II X2 B57 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking21672625
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation3.30no data
Market segmentDesktop processorDesktop processor
Power efficiency1.470.93
Architecture codenamePropus (2009−2011)Callisto (2009−2010)
Release date21 September 2010 (14 years ago)11 May 2010 (14 years ago)
Launch price (MSRP)$80no data

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Athlon II X4 645 and Phenom II X2 B57 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 cores4 (Quad-Core)2 (Dual-core)
Threads42
Base clock speed3.1 GHz3.2 GHz
Boost clock speed3.1 GHz3.2 GHz
L1 cache128 KB (per core)128 KB (per core)
L2 cache512 KB (per core)512 KB (per core)
L3 cache0 KB6 MB (shared)
Chip lithography45 nm45 nm
Die size169 mm2258 mm2
Number of transistors300 million758 million
64 bit support++
Windows 11 compatibility--

Compatibility

Information on Athlon II X4 645 and Phenom II X2 B57 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)95 Watt80 Watt

Memory specs

Types, maximum amount and channel quantity of RAM supported by Athlon II X4 645 and Phenom II X2 B57. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR3

Peripherals

Specifications and connection of peripherals supported by Athlon II X4 645 and Phenom II X2 B57.

PCIe version2.02.0

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.

Athlon II X4 645 1.48
+87.3%
Phenom II X2 B57 0.79

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.

Athlon II X4 645 2351
+86.6%
Phenom II X2 B57 1260

Gaming performance

Pros & cons summary


Performance score 1.48 0.79
Recency 21 September 2010 11 May 2010
Physical cores 4 2
Threads 4 2
Power consumption (TDP) 95 Watt 80 Watt

Athlon II X4 645 has a 87.3% higher aggregate performance score, an age advantage of 4 months, and 100% more physical cores and 100% more threads.

Phenom II X2 B57, on the other hand, has 18.8% lower power consumption.

The Athlon II X4 645 is our recommended choice as it beats the Phenom II X2 B57 in performance tests.


Should you still have questions on choice between Athlon II X4 645 and Phenom II X2 B57, ask them in Comments section, and we shall answer.

Vote for your favorite

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AMD Athlon II X4 645
Athlon II X4 645
AMD Phenom II X2 B57
Phenom II X2 B57

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Community ratings

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


3.8 394 votes

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Questions & comments

Here you can ask a question about Athlon II X4 645 or Phenom II X2 B57, agree or disagree with our judgements, or report an error or mismatch.