Xeon E6540 vs Core 2 Quad Q8400

Primary details

Comparing Core 2 Quad Q8400 and Xeon E6540 processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	2235	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Server
Architecture codename	Yorkfield (2007−2009)	no data
Release date	19 April 2009 (15 years ago)	1 January 2010 (14 years ago)

Detailed specifications

Core 2 Quad Q8400 and Xeon E6540 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)	6 (Hexa-Core)
Threads	4	12
Base clock speed	2.66 GHz	2 GHz
Boost clock speed	0.67 GHz	2.27 GHz
Bus rate	1333 MHz	no data
L1 cache	64 KB (per core)	no data
L2 cache	4 MB (shared)	no data
L3 cache	0 KB	18 MB L3 Cache
Chip lithography	45 nm	45 nm
Die size	2x 82 mm2	no data
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 Q8400 and Xeon E6540 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	no data
Socket	FCLGA775,LGA775	FCLGA1567
Power consumption (TDP)	95 Watt	105 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Quad Q8400 and Xeon E6540. You'll probably need this information if you require some particular technology.

Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	1.0
Hyper-Threading Technology	-	+
Idle States	+	no data
Thermal Monitoring	+	-
Demand Based Switching	-	no data
FSB parity	-	no data
Status	Discontinued	Discontinued

Security technologies

Core 2 Quad Q8400 and Xeon E6540 technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Quad Q8400 and Xeon E6540 are enumerated here.

VT-x	+	+
EPT	no data	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q8400 and Xeon E6540. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR1, DDR2, DDR3

no data

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

On certain motherboards (Chipset feature)

no data

Peripherals

Specifications and connection of peripherals supported by Core 2 Quad Q8400 and Xeon E6540.

PCIe version

2.0

no data

Pros & cons summary

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Recency	19 April 2009	1 January 2010
Physical cores	4	6
Threads	4	12
Power consumption (TDP)	95 Watt	105 Watt

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Should you still have questions on choice between Core 2 Quad Q8400 and Xeon E6540, ask them in Comments section, and we shall answer.

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