Athlon II X2 220 vs Athlon II X4 638

Primary details

Comparing Athlon II X4 638 and Athlon II X2 220 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2212	2760
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	5.30
Market segment	Desktop processor	Desktop processor
Power efficiency	2.07	0.96
Architecture codename	Llano (2011−2012)	Regor (2009−2013)
Release date	6 February 2012 (12 years ago)	21 September 2010 (14 years ago)
Launch price (MSRP)	no data	$32

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Athlon II X4 638 and Athlon II X2 220 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 cores	4 (Quad-Core)	2 (Dual-core)
Threads	4	2
Base clock speed	2.7 GHz	2.8 GHz
Boost clock speed	2.7 GHz	2.8 GHz
L1 cache	128 KB (per core)	128 KB
L2 cache	1 MB (per core)	512 KB
L3 cache	0 KB	0 KB
Chip lithography	32 nm	45 nm
Die size	228 mm2	117 mm2
Number of transistors	1,178 million	410 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Athlon II X4 638 and Athlon II X2 220 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 configuration	1	1
Socket	FM1	AM3
Power consumption (TDP)	65 Watt	65 Watt

Virtualization technologies

Virtual machine speed-up technologies supported by Athlon II X4 638 and Athlon II X2 220 are enumerated here.

AMD-V

+

-

Memory specs

Types, maximum amount and channel quantity of RAM supported by Athlon II X4 638 and Athlon II X2 220. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR3

DDR3

Peripherals

Specifications and connection of peripherals supported by Athlon II X4 638 and Athlon II X2 220.

PCIe version

no data

2.0

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

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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.

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Pros & cons summary

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Performance score	1.42	0.66
Recency	6 February 2012	21 September 2010
Physical cores	4	2
Threads	4	2
Chip lithography	32 nm	45 nm

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Should you still have questions on choice between Athlon II X4 638 and Athlon II X2 220, ask them in Comments section, and we shall answer.

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