Phenom II X4 P940 vs Core 2 Duo E8400

Primary details

Comparing Core 2 Duo E8400 and Phenom II X4 P940 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking2669not rated
Place by popularitynot in top-100not in top-100
Market segmentDesktop processorLaptop
Seriesno data4x AMD Phenom II
Power efficiency1.06no data
Architecture codenameWolfdale (2008−2010)Champlain (2010−2011)
Release date1 January 2008 (16 years ago)4 October 2010 (14 years ago)

Detailed specifications

Core 2 Duo E8400 and Phenom II X4 P940 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 cores2 (Dual-core)4 (Quad-Core)
Threads24
Base clock speed3 GHzno data
Boost clock speed3 GHz1.7 GHz
Bus rate1333 MHz3600 MHz
L1 cache64 KB (per core)512 KB
L2 cache6 MB (shared)2 MB
L3 cache0 KBno data
Chip lithography45 nm45 nm
Die size104 mm2no data
Maximum case temperature (TCase)72 °Cno data
Number of transistors410 millionno data
64 bit support++
Windows 11 compatibility--
VID voltage range0.85V-1.3625Vno data

Compatibility

Information on Core 2 Duo E8400 and Phenom II X4 P940 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 configuration1no data
SocketLGA775S1 (S1g4)
Power consumption (TDP)65 Watt25 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Duo E8400 and Phenom II X4 P940. You'll probably need this information if you require some particular technology.

Instruction set extensionsno dataMMX, 3DNow, SSE (1,2,3,4A), AMD64, Enhanced Virus Protection, Virtualization, HyperTransport 3.0
VirusProtect-+
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 Duo E8400 and Phenom II X4 P940 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 Duo E8400 and Phenom II X4 P940 are enumerated here.

AMD-V-+
VT-d+no data
VT-x+no data

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Duo E8400 and Phenom II X4 P940. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR1, DDR2, DDR3DDR3

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardOn certain motherboards (Chipset feature)no data

Peripherals

Specifications and connection of peripherals supported by Core 2 Duo E8400 and Phenom II X4 P940.

PCIe version2.0no data

Pros & cons summary


Recency 1 January 2008 4 October 2010
Physical cores 2 4
Threads 2 4
Power consumption (TDP) 65 Watt 25 Watt

Phenom II X4 P940 has an age advantage of 2 years, 100% more physical cores and 100% more threads, and 160% lower power consumption.

We couldn't decide between Core 2 Duo E8400 and Phenom II X4 P940. We've got no test results to judge.

Note that Core 2 Duo E8400 is a desktop processor while Phenom II X4 P940 is a notebook one.


Should you still have questions on choice between Core 2 Duo E8400 and Phenom II X4 P940, ask them in Comments section, and we shall answer.

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Intel Core 2 Duo E8400
Core 2 Duo E8400
AMD Phenom II X4 P940
Phenom II X4 P940

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Community ratings

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3.7 2277 votes

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Questions & comments

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