Athlon 64 X2 4000+ vs Phenom II X2 550

Primary details

Comparing Phenom II X2 550 and Athlon 64 X2 4000+ processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	2568	not rated
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	3.55	no data
Market segment	Desktop processor	Desktop processor
Architecture codename	Callisto (2009−2010)	Windsor (2006−2009)
Release date	November 2009 (14 years ago)	May 2006 (18 years ago)
Launch price (MSRP)	$133	no data
Current price	$21 (0.2x MSRP)	$77

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Phenom II X2 550 and Athlon 64 X2 4000+ 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	2 (Dual-core)	2 (Dual-core)
Threads	2	2
Boost clock speed	3.1 GHz	2 GHz
L1 cache	128 KB (per core)	256 KB
L2 cache	512 KB (per core)	512K
L3 cache	6 MB (shared)	0 KB
Chip lithography	45 nm	90 nm
Die size	258 mm2	220 mm2
Number of transistors	758 million	154 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	No	No

Compatibility

Information on Phenom II X2 550 and Athlon 64 X2 4000+ 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	AM2
Power consumption (TDP)	80 Watt	89 Watt

Memory specs

Types, maximum amount and channel quantity of RAM supported by Phenom II X2 550 and Athlon 64 X2 4000+. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR3

no data

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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Pros & cons summary

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Chip lithography	45 nm	90 nm
Power consumption (TDP)	80 Watt	89 Watt

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Should you still have questions on choice between Phenom II X2 550 and Athlon 64 X2 4000+, ask them in Comments section, and we shall answer.

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