Phenom II X4 940 BE vs Core 2 Quad Q8400

Primary details

Comparing Core 2 Quad Q8400 and Phenom II X4 940 BE processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2268	not rated
Place by popularity	not in top-100	not in top-100
Market segment	Desktop processor	Desktop processor
Power efficiency	1.30	no data
Architecture codename	Yorkfield (2007−2009)	Deneb (2009−2011)
Release date	19 April 2009 (15 years ago)	8 January 2009 (15 years ago)
Launch price (MSRP)	no data	$275

Detailed specifications

Core 2 Quad Q8400 and Phenom II X4 940 BE 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	3 GHz
Boost clock speed	0.67 GHz	3 GHz
Bus rate	1333 MHz	no data
L1 cache	64 KB (per core)	128 KB (per core)
L2 cache	4 MB (shared)	512 KB (per core)
L3 cache	0 KB	6 MB (shared)
Chip lithography	45 nm	45 nm
Die size	2x 82 mm2	258 mm2
Maximum case temperature (TCase)	71 °C	no data
Number of transistors	456 million	758 million
64 bit support	+	+
Windows 11 compatibility	-	-
Unlocked multiplier	-	+
VID voltage range	0.85V-1.3625V	no data

Compatibility

Information on Core 2 Quad Q8400 and Phenom II X4 940 BE 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	1
Socket	FCLGA775,LGA775	AM2+
Power consumption (TDP)	95 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Quad Q8400 and Phenom II X4 940 BE. You'll probably need this information if you require some particular technology.

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

Security technologies

Core 2 Quad Q8400 and Phenom II X4 940 BE technologies aimed at improving security, for example, by protecting against hacks.

TXT	-	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Quad Q8400 and Phenom II X4 940 BE are enumerated here.

AMD-V	-	+
VT-x	+	no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Quad Q8400 and Phenom II X4 940 BE. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types

DDR1, DDR2, DDR3

DDR3

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card

On certain motherboards (Chipset feature)

On certain motherboards (Chipset feature)

Peripherals

Specifications and connection of peripherals supported by Core 2 Quad Q8400 and Phenom II X4 940 BE.

PCIe version

2.0

2.0

Pros & cons summary

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Recency	19 April 2009	8 January 2009
Power consumption (TDP)	95 Watt	125 Watt

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Should you still have questions on choice between Core 2 Quad Q8400 and Phenom II X4 940 BE, ask them in Comments section, and we shall answer.

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