Xeon E5345 vs X5355

Primary details

Comparing Xeon X5355 and Xeon E5345 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2292	2371
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.05	0.06
Market segment	Server	Server
Power efficiency	1.01	1.40
Architecture codename	Clovertown (2006−2007)	Clovertown (2006−2007)
Release date	14 November 2006 (18 years ago)	14 November 2006 (18 years ago)
Launch price (MSRP)	$1,172	$851

Cost-effectiveness evaluation

Performance per price, higher is better.

Xeon E5345 has 20% better value for money than Xeon X5355.

Detailed specifications

Xeon X5355 and Xeon E5345 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)	4 (Quad-Core)
Threads	4	4
Base clock speed	2.66 GHz	2.33 GHz
Boost clock speed	0.67 GHz	0.33 GHz
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	4 MB (per die)	4 MB (per die)
L3 cache	8 MB L2 Cache	8 MB L2 Cache
Chip lithography	65 nm	65 nm
Die size	2x 143 mm2	2x 143 mm2
Maximum case temperature (TCase)	63 °C	66 °C
Number of transistors	582 million	582 million
64 bit support	+	+
VID voltage range	1V-1.5V	1V-1.5V

Compatibility

Information on Xeon X5355 and Xeon E5345 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	2
Socket	LGA771,PLGA771	LGA771,PLGA771
Power consumption (TDP)	120 Watt	80 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon X5355 and Xeon E5345. 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	32 Bit
FSB parity	+	+

Security technologies

Xeon X5355 and Xeon E5345 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 Xeon E5345 are enumerated here.

VT-x	+	+
EPT	-	-

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon X5355 and Xeon E5345. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR2, DDR3 Depends on motherboard

DDR2, DDR3 Depends on motherboard

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

N/A

N/A

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	1.18
Power consumption (TDP)	120 Watt	80 Watt

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Should you still have questions on choice between Xeon X5355 and Xeon E5345, ask them in Comments section, and we shall answer.

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