Core 2 Quad Q9550s vs Xeon L5420

Primary details

Comparing Xeon L5420 and Core 2 Quad Q9550s processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2242	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Server	Desktop processor
Power efficiency	2.56	no data
Architecture codename	no data	Yorkfield (2007−2009)
Release date	1 January 2008 (16 years ago)	27 January 2009 (15 years ago)

Detailed specifications

Xeon L5420 and Core 2 Quad Q9550s 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	no data	4 (Quad-Core)
Threads	no data	4
Base clock speed	2.5 GHz	2.83 GHz
Boost clock speed	no data	0.83 GHz
Bus rate	no data	1333 MHz
L1 cache	no data	64 KB (per core)
L2 cache	no data	12 MB (shared)
L3 cache	12 MB L2 Cache	0 KB
Chip lithography	45 nm	45 nm
Die size	no data	2x 107 mm2
Maximum core temperature	57 °C	no data
Maximum case temperature (TCase)	no data	76 °C
Number of transistors	no data	820 million
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	0.85V-1.35V	0.85V-1.3625V

Compatibility

Information on Xeon L5420 and Core 2 Quad Q9550s 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	no data	1
Socket	LGA771	LGA775
Power consumption (TDP)	50 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon L5420 and Core 2 Quad Q9550s. 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	+	-
FSB parity	+	+

Security technologies

Xeon L5420 and Core 2 Quad Q9550s technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	+
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon L5420 and Core 2 Quad Q9550s are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon L5420 and Core 2 Quad Q9550s. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

no data

DDR1, DDR2, DDR3

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

no data

On certain motherboards (Chipset feature)

Peripherals

Specifications and connection of peripherals supported by Xeon L5420 and Core 2 Quad Q9550s.

PCIe version

no data

2.0

Pros & cons summary

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Recency	1 January 2008	27 January 2009
Power consumption (TDP)	50 Watt	65 Watt

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