Athlon II X4 638: specs and benchmarks

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Aggregate performance score

Athlon II X4 638
2012
4 cores / 4 threads, 65 Watt
1.42

Athlon II X4 638 provides poor benchmark performance at 1.42% of a leader's which is a 96-core EPYC 9655P.

Summary

AMD started Athlon II X4 638 sales 6 February 2012. This is a Llano architecture desktop processor primarily aimed at office systems. It has 4 cores and 4 threads, and is based on 32 nm manufacturing technology, with a maximum frequency of 2.7 and a locked multiplier.

Compatibility-wise, this is AMD Socket FM1 processor with a TDP of 65 Watt. It supports DDR3 memory.

Primary details

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

Place in the ranking2210
Place by popularitynot in top-100
Market segmentDesktop processor
Power efficiency2.07of 100.00 (Ryzen Z1 Extreme)
Architecture codenameLlano (2011−2012)
Release date6 February 2012 (12 years ago)

Detailed specifications

Basic microprocessor parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters can generally indicate CPU performance, but to be more precise you have to review its test results.

Physical cores4 (Quad-Core)
Threads4
Base clock speed2.7 GHzof 4.7 GHz (FX-9590)
Boost clock speed2.7 GHzof 6.2 GHz (Core i9-14900KS)
L1 cache128 KB (per core)of 80 KB (EPYC 9965)
L2 cache1 MB (per core)of 2 MB (Xeon 6980P)
L3 cache0 KBof 1152 MB (EPYC 9684X)
Chip lithography32 nmof 3 nm (Apple M3 Max 16-Core)
Die size228 mm2
Number of transistors1,178 millionof 135,240 million (EPYC 9684X)
64 bit support+
Windows 11 compatibility-

Compatibility

Information on Athlon II X4 638 compatibility with other computer components and devices: 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 configuration1of 8 (Opteron 842)
SocketFM1
Power consumption (TDP)65 Wattof 500 Watt (Xeon 6960P)

Virtualization technologies

Supported virtual machine optimization technologies. Some are specific to Intel only, some to AMD.

AMD-V+

Memory specs

Types, maximum amount and channel number of RAM supported by Athlon II X4 638's memory controller. Depending on the motherboard, higher memory frequency may be supported.

Supported memory typesDDR3

Benchmark performance

Single-core and multi-core benchmark results of Athlon II X4 638. Overall benchmark performance 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 1.42

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 638 2250

Gaming performance

Closest competitors

Athlon II X4 638's performance relative to its closest rivals among desktop CPUs.


Intel equivalent

According to our data, the closest Intel alternative to Athlon II X4 638 is Core i3-3225, which is nearly equal in speed and higher by 2 positions in our ranking.

Here are some closest Intel rivals to Athlon II X4 638:

Athlon II X4 638 100

Similar processors

Here is our recommendation of several processors that are more or less close in performance to the one reviewed.

Recommended GPUs

People consider these graphics cards to be good for Athlon II X4 638, according to our PC configuration statistics.

These are the fastest graphics cards for Athlon II X4 638 in our user configuration statistics. There is a total of 93 configurations using Athlon II X4 638 in our database.

All comparisons with Athlon II X4 638

Community ratings

Here is the rating given to the reviewed processor by our users. Let others know your opinion by rating it yourself.


3.1 34 votes

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Questions & comments

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