Phenom II X2 550 vs Athlon II X4 620

Primary details

Comparing Athlon II X4 620 and Phenom II X2 550 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2283	2666
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.43	0.02
Market segment	Desktop processor	Desktop processor
Power efficiency	1.27	0.87
Architecture codename	Propus (2009−2011)	Callisto (2009−2010)
Release date	16 September 2009 (15 years ago)	4 November 2009 (15 years ago)
Launch price (MSRP)	$65	$133

Cost-effectiveness evaluation

Performance per price, higher is better.

Athlon II X4 620 has 17050% better value for money than Phenom II X2 550.

Detailed specifications

Athlon II X4 620 and Phenom II X2 550 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	2.6 GHz	3.1 GHz
Boost clock speed	2.6 GHz	3.1 GHz
L1 cache	128 KB (per core)	128 KB (per core)
L2 cache	512 KB (per core)	512 KB (per core)
L3 cache	0 KB	6 MB (shared)
Chip lithography	45 nm	45 nm
Die size	169 mm2	258 mm2
Number of transistors	300 million	758 million
64 bit support	+	+
Windows 11 compatibility	-	-

Compatibility

Information on Athlon II X4 620 and Phenom II X2 550 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	AM3	AM3
Power consumption (TDP)	95 Watt	80 Watt

Virtualization technologies

Virtual machine speed-up technologies supported by Athlon II X4 620 and Phenom II X2 550 are enumerated here.

AMD-V

-

+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Athlon II X4 620 and Phenom II X2 550. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR3

DDR3

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

On certain motherboards (Chipset feature)

On certain motherboards (Chipset feature)

Peripherals

Specifications and connection of peripherals supported by Athlon II X4 620 and Phenom II X2 550.

PCIe version

2.0

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	1.30	0.75
Recency	16 September 2009	4 November 2009
Physical cores	4	2
Threads	4	2
Power consumption (TDP)	95 Watt	80 Watt

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Should you still have questions on choice between Athlon II X4 620 and Phenom II X2 550, ask them in Comments section, and we shall answer.

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