Core i7-2640M vs Core 2 Duo E8400

VS

Aggregate performance score

Core 2 Duo E8400
2008
2 cores / 2 threads, 65 Watt
0.73
Core i7-2640M
2011
2 cores / 4 threads, 35 Watt
1.55
+112%

Core i7-2640M outperforms Core 2 Duo E8400 by a whopping 112% based on our aggregate benchmark results.

Primary details

Comparing Core 2 Duo E8400 and Core i7-2640M processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking26852130
Place by popularitynot in top-100not in top-100
Market segmentDesktop processorLaptop
Seriesno dataIntel Core i7
Power efficiency1.064.19
Architecture codenameWolfdale (2008−2010)Sandy Bridge (2011−2013)
Release date1 January 2008 (16 years ago)4 September 2011 (13 years ago)
Launch price (MSRP)no data$346

Detailed specifications

Core 2 Duo E8400 and Core i7-2640M 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)2 (Dual-core)
Threads24
Base clock speed3 GHz2.8 GHz
Boost clock speed3 GHz3.5 GHz
Bus typeno dataDMI 2.0
Bus rate1333 MHz4 × 5 GT/s
Multiplierno data28
L1 cache64 KB (per core)128 KB
L2 cache6 MB (shared)512 KB
L3 cache0 KB4 MB
Chip lithography45 nm32 nm
Die size104 mm2149 mm2
Maximum core temperatureno data100 °C
Maximum case temperature (TCase)72 °Cno data
Number of transistors410 million624 Million
64 bit support++
Windows 11 compatibility--
VID voltage range0.85V-1.3625Vno data

Compatibility

Information on Core 2 Duo E8400 and Core i7-2640M 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 configuration11 (Uniprocessor)
SocketLGA775FCBGA1023,PPGA988
Power consumption (TDP)65 Watt35 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Duo E8400 and Core i7-2640M. You'll probably need this information if you require some particular technology.

Instruction set extensionsno dataIntel® AVX
AES-NI-+
FMA-+
AVX-+
vProno data+
Enhanced SpeedStep (EIST)++
My WiFino data+
Turbo Boost Technology-2.0
Hyper-Threading Technology-+
Idle States++
Thermal Monitoring++
Flex Memory Accessno data+
Demand Based Switching--
FDIno data+
Fast Memory Accessno data+
FSB parity-no data

Security technologies

Core 2 Duo E8400 and Core i7-2640M technologies aimed at improving security, for example, by protecting against hacks.

TXT++
EDB++
Identity Protection-+
Anti-Theftno data+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Duo E8400 and Core i7-2640M are enumerated here.

AMD-V-+
VT-d++
VT-x++
EPTno data+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Duo E8400 and Core i7-2640M. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR1, DDR2, DDR3DDR3
Maximum memory sizeno data16 GB
Max memory channelsno data2
Maximum memory bandwidthno data228.707 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardOn certain motherboards (Chipset feature)Intel HD Graphics 3000
Quick Sync Video-+
Clear Video HDno data+
Graphics max frequencyno data1.3 GHz
InTru 3Dno data+

Graphics interfaces

Available interfaces and connections of Core 2 Duo E8400 and Core i7-2640M integrated GPUs.

Number of displays supportedno data2
eDPno data+
DisplayPort-+
HDMI-+
SDVOno data+
CRTno data+

Peripherals

Specifications and connection of peripherals supported by Core 2 Duo E8400 and Core i7-2640M.

PCIe version2.02.0
PCI Express lanesno data16

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

Core 2 Duo E8400 0.73
i7-2640M 1.55
+112%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Core 2 Duo E8400 1165
i7-2640M 2461
+111%

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

Core 2 Duo E8400 370
i7-2640M 516
+39.5%

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

Core 2 Duo E8400 604
i7-2640M 1021
+69%

Gaming performance

Pros & cons summary


Performance score 0.73 1.55
Recency 1 January 2008 4 September 2011
Threads 2 4
Chip lithography 45 nm 32 nm
Power consumption (TDP) 65 Watt 35 Watt

i7-2640M has a 112.3% higher aggregate performance score, an age advantage of 3 years, 100% more threads, a 40.6% more advanced lithography process, and 85.7% lower power consumption.

The Core i7-2640M is our recommended choice as it beats the Core 2 Duo E8400 in performance tests.

Note that Core 2 Duo E8400 is a desktop processor while Core i7-2640M is a notebook one.


Should you still have questions on choice between Core 2 Duo E8400 and Core i7-2640M, ask them in Comments section, and we shall answer.

Vote for your favorite

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Intel Core 2 Duo E8400
Core 2 Duo E8400
Intel Core i7-2640M
Core i7-2640M

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Community ratings

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Questions & comments

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