Phenom II X2 550 vs Xeon X5355

Primary details

Comparing Xeon X5355 and Phenom II X2 550 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2275	2664
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.04	0.02
Market segment	Server	Desktop processor
Power efficiency	1.01	0.87
Architecture codename	Clovertown (2006−2007)	Callisto (2009−2010)
Release date	14 November 2006 (17 years ago)	4 November 2009 (15 years ago)
Launch price (MSRP)	$1,172	$133

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon X5355 has 100% better value for money than Phenom II X2 550.

Detailed specifications

Xeon X5355 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	2.66 GHz	3.1 GHz
Boost clock speed	0.67 GHz	3.1 GHz
L1 cache	64 KB (per core)	128 KB (per core)
L2 cache	4 MB (per die)	512 KB (per core)
L3 cache	8 MB L2 Cache	6 MB (shared)
Chip lithography	65 nm	45 nm
Die size	2x 143 mm2	258 mm2
Maximum case temperature (TCase)	63 °C	no data
Number of transistors	582 million	758 million
64 bit support	+	+
Windows 11 compatibility	no data	-
VID voltage range	1V-1.5V	no data

Compatibility

Information on Xeon X5355 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	2	1
Socket	LGA771,PLGA771	AM3
Power consumption (TDP)	120 Watt	80 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon X5355 and Phenom II X2 550. You'll probably need this information if you require some particular technology.

Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	-	no data
Hyper-Threading Technology	-	no data
Idle States	+	no data
Thermal Monitoring	+	-
Demand Based Switching	+	no data
PAE	32 Bit	no data
FSB parity	+	no data

Security technologies

Xeon X5355 and Phenom II X2 550 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon X5355 and Phenom II X2 550 are enumerated here.

AMD-V	-	+
VT-x	+	no data
EPT	-	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon X5355 and Phenom II X2 550. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR2, DDR3 Depends on motherboard

DDR3

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

On certain motherboards (Chipset feature)

Peripherals

Specifications and connection of peripherals supported by Xeon X5355 and Phenom II X2 550.

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	1.32	0.76
Recency	14 November 2006	4 November 2009
Physical cores	4	2
Threads	4	2
Chip lithography	65 nm	45 nm
Power consumption (TDP)	120 Watt	80 Watt

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Should you still have questions on choice between Xeon X5355 and Phenom II X2 550, ask them in Comments section, and we shall answer.

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