Xeon X5355 vs Core 2 Quad Q9400

Primary details

Comparing Core 2 Quad Q9400 and Xeon X5355 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2253	2289
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	0.05
Market segment	Desktop processor	Server
Power efficiency	1.34	1.00
Architecture codename	Yorkfield (2007−2009)	Clovertown (2006−2007)
Release date	August 2008 (16 years ago)	14 November 2006 (18 years ago)
Launch price (MSRP)	no data	$1,172

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core 2 Quad Q9400 and Xeon X5355 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	2.66 GHz
Boost clock speed	2.67 GHz	0.67 GHz
Bus rate	1333 MHz	no data
L1 cache	64K (per core)	64 KB (per core)
L2 cache	6 MB (shared)	4 MB (per die)
L3 cache	0 KB	8 MB L2 Cache
Chip lithography	45 nm	65 nm
Die size	2x 81 mm2	2x 143 mm2
Maximum case temperature (TCase)	71 °C	63 °C
Number of transistors	456 million	582 million
64 bit support	+	+
Windows 11 compatibility	-	no data
VID voltage range	0.85V-1.3625V	1V-1.5V

Compatibility

Information on Core 2 Quad Q9400 and Xeon X5355 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	2
Socket	LGA775	LGA771,PLGA771
Power consumption (TDP)	95 Watt	120 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Quad Q9400 and Xeon X5355. 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	no data	32 Bit
FSB parity	-	+

Security technologies

Core 2 Quad Q9400 and Xeon X5355 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Quad Q9400 and Xeon X5355 are enumerated here.

VT-d	+	no data
VT-x	+	+
EPT	no data	-

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q9400 and Xeon X5355. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR1, DDR2, DDR3

DDR2, DDR3 Depends on motherboard

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

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	1.35	1.28
Chip lithography	45 nm	65 nm
Power consumption (TDP)	95 Watt	120 Watt

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Should you still have questions on choice between Core 2 Quad Q9400 and Xeon X5355, ask them in Comments section, and we shall answer.

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