Core 2 Duo E6550 vs Xeon X5355

Primary details

Comparing Xeon X5355 and Core 2 Duo E6550 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2290	2831
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.05	no data
Market segment	Server	Desktop processor
Power efficiency	1.00	0.83
Architecture codename	Clovertown (2006−2007)	Conroe (2006−2007)
Release date	14 November 2006 (18 years ago)	July 2007 (17 years ago)
Launch price (MSRP)	$1,172	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Xeon X5355 and Core 2 Duo E6550 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	2.33 GHz
Boost clock speed	0.67 GHz	2.33 GHz
Bus rate	no data	1333 MHz
L1 cache	64 KB (per core)	64 KB
L2 cache	4 MB (per die)	4 MB
L3 cache	8 MB L2 Cache	0 KB
Chip lithography	65 nm	65 nm
Die size	2x 143 mm2	143 mm2
Maximum core temperature	no data	72 °C
Maximum case temperature (TCase)	63 °C	no data
Number of transistors	582 million	291 million
64 bit support	+	+
Windows 11 compatibility	no data	-
VID voltage range	1V-1.5V	0.85V-1.5V

Compatibility

Information on Xeon X5355 and Core 2 Duo E6550 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	PLGA775
Power consumption (TDP)	120 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon X5355 and Core 2 Duo E6550. You'll probably need this information if you require some particular technology.

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

Security technologies

Xeon X5355 and Core 2 Duo E6550 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon X5355 and Core 2 Duo E6550 are enumerated here.

VT-x	+	+
EPT	-	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon X5355 and Core 2 Duo E6550. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR2, DDR3 Depends on motherboard

DDR1, DDR2, DDR3

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

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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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	1.28	0.57
Physical cores	4	2
Threads	4	2
Power consumption (TDP)	120 Watt	65 Watt

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Should you still have questions on choice between Xeon X5355 and Core 2 Duo E6550, ask them in Comments section, and we shall answer.

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