Phenom II X2 550 vs Phenom II X4 840

VS

Aggregate performance score

Phenom II X4 840
2011
4 cores / 4 threads, 95 Watt
1.52
+108%
Phenom II X2 550
2009
2 cores / 2 threads, 80 Watt
0.73

Phenom II X4 840 outperforms Phenom II X2 550 by a whopping 108% based on our aggregate benchmark results.

Primary details

Comparing Phenom II X4 840 and Phenom II X2 550 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking21442683
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation3.080.04
Market segmentDesktop processorDesktop processor
Power efficiency1.510.86
Architecture codenamePropus (2009−2011)Callisto (2009−2010)
Release date4 January 2011 (13 years ago)4 November 2009 (15 years ago)
Launch price (MSRP)$90$133

Cost-effectiveness evaluation

Performance per price, higher is better.

Phenom II X4 840 has 7600% better value for money than Phenom II X2 550.

Detailed specifications

Phenom II X4 840 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 cores4 (Quad-Core)2 (Dual-core)
Threads42
Base clock speed3.2 GHz3.1 GHz
Boost clock speed3.2 GHz3.1 GHz
L1 cache128 KB (per core)128 KB (per core)
L2 cache512 KB (per core)512 KB (per core)
L3 cache0 KB6 MB (shared)
Chip lithography45 nm45 nm
Die size169 mm2258 mm2
Number of transistors300 million758 million
64 bit support++
Windows 11 compatibility--

Compatibility

Information on Phenom II X4 840 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 configuration11
SocketAM3AM3
Power consumption (TDP)95 Watt80 Watt

Virtualization technologies

Virtual machine speed-up technologies supported by Phenom II X4 840 and Phenom II X2 550 are enumerated here.

AMD-V-+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Phenom II X4 840 and Phenom II X2 550. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR3

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataOn certain motherboards (Chipset feature)

Peripherals

Specifications and connection of peripherals supported by Phenom II X4 840 and Phenom II X2 550.

PCIe version2.02.0

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.

Phenom II X4 840 1.52
+108%
Phenom II X2 550 0.73

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.

Phenom II X4 840 2417
+107%
Phenom II X2 550 1167

Gaming performance

Pros & cons summary


Performance score 1.52 0.73
Recency 4 January 2011 4 November 2009
Physical cores 4 2
Threads 4 2
Power consumption (TDP) 95 Watt 80 Watt

Phenom II X4 840 has a 108.2% higher aggregate performance score, an age advantage of 1 year, and 100% more physical cores and 100% more threads.

Phenom II X2 550, on the other hand, has 18.8% lower power consumption.

The Phenom II X4 840 is our recommended choice as it beats the Phenom II X2 550 in performance tests.


Should you still have questions on choice between Phenom II X4 840 and Phenom II X2 550, ask them in Comments section, and we shall answer.

Vote for your favorite

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AMD Phenom II X4 840
Phenom II X4 840
AMD Phenom II X2 550
Phenom II X2 550

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Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


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Questions & comments

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