Xeon E5-4640 v2 vs Core 2 Quad Q9400

Primary details

Comparing Core 2 Quad Q9400 and Xeon E5-4640 v2 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2256	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Server
Power efficiency	1.34	no data
Architecture codename	Yorkfield (2007−2009)	no data
Release date	August 2008 (16 years ago)	1 January 2014 (10 years ago)

Detailed specifications

Core 2 Quad Q9400 and Xeon E5-4640 v2 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)	10 (Deca-Core)
Threads	4	20
Base clock speed	2.66 GHz	2.2 GHz
Boost clock speed	2.67 GHz	2.7 GHz
Bus rate	1333 MHz	8 GT/s
L1 cache	64K (per core)	no data
L2 cache	6 MB (shared)	no data
L3 cache	0 KB	20 MB Intel® Smart Cache
Chip lithography	45 nm	22 nm
Die size	2x 81 mm2	no data
Maximum core temperature	no data	75 °C
Maximum case temperature (TCase)	71 °C	no data
Number of transistors	456 million	no data
64 bit support	+	+
Windows 11 compatibility	-	-
VID voltage range	0.85V-1.3625V	no data

Compatibility

Information on Core 2 Quad Q9400 and Xeon E5-4640 v2 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	4
Socket	LGA775	FCLGA2011
Power consumption (TDP)	95 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Quad Q9400 and Xeon E5-4640 v2. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Intel® AVX
AES-NI	-	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	2.0
Hyper-Threading Technology	-	+
Idle States	+	+
Thermal Monitoring	+	+
Demand Based Switching	-	+
PAE	no data	46 Bit
FSB parity	-	no data

Security technologies

Core 2 Quad Q9400 and Xeon E5-4640 v2 technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	no data	+
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Quad Q9400 and Xeon E5-4640 v2 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q9400 and Xeon E5-4640 v2. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR1, DDR2, DDR3	DDR3-800, DDR3-1066, DDR3-1333, DDR3-1600, DDR3-1866
Maximum memory size	no data	768 GB
Max memory channels	no data	4
Maximum memory bandwidth	no data	59.7 GB/s
ECC memory support	-	+

Peripherals

Specifications and connection of peripherals supported by Core 2 Quad Q9400 and Xeon E5-4640 v2.

PCIe version	no data	3.0
PCI Express lanes	no data	40

Pros & cons summary

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Physical cores	4	10
Threads	4	20
Chip lithography	45 nm	22 nm

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Should you still have questions on choice between Core 2 Quad Q9400 and Xeon E5-4640 v2, ask them in Comments section, and we shall answer.

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