AMD Athlon II X4 635 vs Athlon II X4 638

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Combined performance score

Athlon II X4 638
1.46
+1.4%

Athlon II X4 638 outperforms Athlon II X4 635 by 1% in our combined benchmark results.

General info

Comparing Athlon II X4 638 and Athlon II X4 635 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking20422063
Place by popularitynot in top-100not in top-100
Value for money2.052.86
Market segmentDesktop processorDesktop processor
Architecture codenameLlano (2011−2012)Propus (2009−2011)
Release date6 February 2012 (12 years old)25 January 2010 (14 years old)
Launch price (MSRP)no data$70
Current price$27 $23 (0.3x MSRP)
Value for money

Performance per price, higher is better.

Athlon II X4 635 has 40% better value for money than Athlon II X4 638.

Technical specs

Athlon II X4 638 and Athlon II X4 635 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)4 (Quad-Core)
Threads44
Base clock speed2.7 GHz2.9 GHz
Boost clock speed2.7 GHz2.9 GHz
L1 cache128 KB (per core)128 KB (per core)
L2 cache1 MB (per core)512 KB (per core)
L3 cache0 KB0 KB
Chip lithography32 nm45 nm
Die size228 mm2169 mm2
Number of transistors1,178 million300 million
64 bit support++
Windows 11 compatibility--
Unlocked multiplierNoNo

Compatibility

Information on Athlon II X4 638 and Athlon II X4 635 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
SocketFM1AM3
Power consumption (TDP)65 Watt95 Watt

Virtualization technologies

Virtual machine speed-up technologies supported by Athlon II X4 638 and Athlon II X4 635 are enumerated here.

AMD-V+no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Athlon II X4 638 and Athlon II X4 635. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR3

Peripherals

Specifications and connection of peripherals supported by Athlon II X4 638 and Athlon II X4 635.

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.

Athlon II X4 638 1.46
+1.4%
Athlon II X4 635 1.44

Athlon II X4 638 outperforms Athlon II X4 635 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%

Athlon II X4 638 2250
+2%
Athlon II X4 635 2206

Athlon II X4 638 outperforms Athlon II X4 635 by 2% in Passmark.

Gaming performance

Advantages and disadvantages


Performance score 1.46 1.44
Recency 6 February 2012 25 January 2010
Chip lithography 32 nm 45 nm
Power consumption (TDP) 65 Watt 95 Watt

We couldn't decide between Athlon II X4 638 and Athlon II X4 635. The differences in performance seem too small.


Should you still have questions on choice between Athlon II X4 638 and Athlon II X4 635, 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 Athlon II X4 638
Athlon II X4 638
AMD Athlon II X4 635
Athlon II X4 635

Similar processor comparisons

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User ratings: view and submit

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3.3 29 votes

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Questions and comments

Here you can ask a question about Athlon II X4 638 or Athlon II X4 635, agree or disagree with our judgements, or report an error or mismatch.