Core 2 Duo P8400 vs Core i7-3820

VS

Aggregate performance score

Core i7-3820
2012
4 cores / 8 threads, 130 Watt
3.63
+585%
Core 2 Duo P8400
2008
2 cores / 2 threads, 25 Watt
0.53

Core i7-3820 outperforms Core 2 Duo P8400 by a whopping 585% based on our aggregate benchmark results.

Primary details

Comparing Core i7-3820 and Core 2 Duo P8400 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking15022861
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation2.32no data
Market segmentDesktop processorLaptop
Seriesno dataIntel Core 2 Duo
Power efficiency2.642.01
Architecture codenameSandy Bridge-E (2011−2013)Penryn (2008−2011)
Release dateFebruary 2012 (12 years ago)15 July 2008 (16 years ago)
Launch price (MSRP)$400$209

Cost-effectiveness evaluation

Performance per price, higher is better.

no data

Detailed specifications

Core i7-3820 and Core 2 Duo P8400 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 cores4 (Quad-Core)2 (Dual-core)
Threads82
Base clock speed3.6 GHz2.26 GHz
Boost clock speed3.8 GHz2.26 GHz
Bus rate5 GT/s1066 MHz
L1 cache64 KB (per core)128 KB
L2 cache256 KB (per core)3 MB
L3 cache10240 KB (shared)3 MB L2 Cache
Chip lithography32 nm45 nm
Die size294 mm2107 mm2
Maximum core temperatureno data105 °C
Maximum case temperature (TCase)67 °Cno data
Number of transistors1270 million410 Million
64 bit support++
Windows 11 compatibility--
VID voltage rangeno data1.05V-1.15V

Compatibility

Information on Core i7-3820 and Core 2 Duo P8400 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
SocketFCLGA2011BGA479,PBGA479,PGA478
Power consumption (TDP)130 Watt25 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-3820 and Core 2 Duo P8400. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.2, Intel® AVXno data
AES-NI+-
AVX+-
Enhanced SpeedStep (EIST)++
Turbo Boost Technology2.0-
Hyper-Threading Technology+-
Idle States++
Thermal Monitoring+-
Smart Response+no data
Demand Based Switching--
FSB parityno data-

Security technologies

Core i7-3820 and Core 2 Duo P8400 technologies aimed at improving security, for example, by protecting against hacks.

TXT-+
EDB++
Identity Protection+-

Virtualization technologies

Virtual machine speed-up technologies supported by Core i7-3820 and Core 2 Duo P8400 are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-3820 and Core 2 Duo P8400. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3no data
Maximum memory size64.23 GBno data
Max memory channels4no data
Maximum memory bandwidth51.2 GB/sno data

Peripherals

Specifications and connection of peripherals supported by Core i7-3820 and Core 2 Duo P8400.

PCIe version2.0no data
PCI Express lanes40no data

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.

i7-3820 3.63
+585%
Core 2 Duo P8400 0.53

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.

i7-3820 5773
+581%
Core 2 Duo P8400 848

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.

i7-3820 622
+123%
Core 2 Duo P8400 279

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.

i7-3820 2289
+399%
Core 2 Duo P8400 459

Gaming performance

Pros & cons summary


Performance score 3.63 0.53
Physical cores 4 2
Threads 8 2
Chip lithography 32 nm 45 nm
Power consumption (TDP) 130 Watt 25 Watt

i7-3820 has a 584.9% higher aggregate performance score, 100% more physical cores and 300% more threads, and a 40.6% more advanced lithography process.

Core 2 Duo P8400, on the other hand, has 420% lower power consumption.

The Core i7-3820 is our recommended choice as it beats the Core 2 Duo P8400 in performance tests.

Note that Core i7-3820 is a desktop processor while Core 2 Duo P8400 is a notebook one.


Should you still have questions on choice between Core i7-3820 and Core 2 Duo P8400, ask them in Comments section, and we shall answer.

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Intel Core i7-3820
Core i7-3820
Intel Core 2 Duo P8400
Core 2 Duo P8400

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Community ratings

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Questions & comments

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