Core 2 Quad Q9550s vs Xeon E5-2666 V3

Primary details

Comparing Xeon E5-2666 V3 and Core 2 Quad Q9550s processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	856	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Server	Desktop processor
Power efficiency	6.26	no data
Architecture codename	Haswell-EP (2014−2015)	Yorkfield (2007−2009)
Release date	13 November 2014 (10 years ago)	27 January 2009 (15 years ago)

Detailed specifications

Xeon E5-2666 V3 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	10 (Deca-Core)	4 (Quad-Core)
Threads	20	4
Base clock speed	2.9 GHz	2.83 GHz
Boost clock speed	3.5 GHz	0.83 GHz
Bus rate	no data	1333 MHz
L1 cache	64K (per core)	64 KB (per core)
L2 cache	256K (per core)	12 MB (shared)
L3 cache	25 MB (shared)	0 KB
Chip lithography	22 nm	45 nm
Die size	356 mm2	2x 107 mm2
Maximum case temperature (TCase)	no data	76 °C
Number of transistors	2,600 million	820 million
64 bit support	+	+
Windows 11 compatibility	no data	-
VID voltage range	no data	0.85V-1.3625V

Compatibility

Information on Xeon E5-2666 V3 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	2	1
Socket	2011-3	LGA775
Power consumption (TDP)	135 Watt	65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Xeon E5-2666 V3 and Core 2 Quad Q9550s. You'll probably need this information if you require some particular technology.

AES-NI	+	-
AVX	+	-
vPro	+	no data
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	no data	-
Hyper-Threading Technology	no data	-
TSX	+	-
Idle States	no data	+
Thermal Monitoring	-	+
Demand Based Switching	no data	-
FSB parity	no data	+

Security technologies

Xeon E5-2666 V3 and Core 2 Quad Q9550s technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Xeon E5-2666 V3 and Core 2 Quad Q9550s are enumerated here.

VT-d	+	+
VT-x	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Xeon E5-2666 V3 and Core 2 Quad Q9550s. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR3, DDR4 2133 MHz Quad-channel

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 E5-2666 V3 and Core 2 Quad Q9550s.

PCIe version	3.0	2.0
PCI Express lanes	40	no data

Pros & cons summary

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Recency	13 November 2014	27 January 2009
Physical cores	10	4
Threads	20	4
Chip lithography	22 nm	45 nm
Power consumption (TDP)	135 Watt	65 Watt

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