Pentium G640 vs i7-3820

VS

Aggregate performance score

Core i7-3820
2012
4 cores / 8 threads, 130 Watt
3.63
+327%
Pentium G640
2012
2 cores / 2 threads, 65 Watt
0.85

Core i7-3820 outperforms Pentium G640 by a whopping 327% based on our aggregate benchmark results.

Primary details

Comparing Core i7-3820 and Pentium G640 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking15022577
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation2.320.05
Market segmentDesktop processorDesktop processor
Power efficiency2.641.24
Architecture codenameSandy Bridge-E (2011−2013)Sandy Bridge (2011−2013)
Release dateFebruary 2012 (12 years ago)3 June 2012 (12 years ago)
Launch price (MSRP)$400$179

Cost-effectiveness evaluation

Performance per price, higher is better.

i7-3820 has 4540% better value for money than Pentium G640.

Detailed specifications

Core i7-3820 and Pentium G640 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 GHz2.8 GHz
Boost clock speed3.8 GHz2.8 GHz
Bus rate5 GT/s5 GT/s
L1 cache64 KB (per core)64 KB (per core)
L2 cache256 KB (per core)256 KB (per core)
L3 cache10240 KB (shared)3 MB (shared)
Chip lithography32 nm32 nm
Die size294 mm2131 mm2
Maximum core temperatureno data69 °C
Maximum case temperature (TCase)67 °Cno data
Number of transistors1270 million504 million
64 bit support++
Windows 11 compatibility--

Compatibility

Information on Core i7-3820 and Pentium G640 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
SocketFCLGA2011FCLGA1155
Power consumption (TDP)130 Watt65 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i7-3820 and Pentium G640. You'll probably need this information if you require some particular technology.

Instruction set extensionsIntel® SSE4.2, Intel® AVXIntel® SSE4.1, Intel® SSE4.2
AES-NI++
AVX++
Enhanced SpeedStep (EIST)++
Turbo Boost Technology2.0-
Hyper-Threading Technology+-
Idle States++
Thermal Monitoring++
Flex Memory Accessno data+
Smart Response+no data
Demand Based Switching-no data
FDIno data+
Fast Memory Accessno data+

Security technologies

Core i7-3820 and Pentium G640 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 Pentium G640 are enumerated here.

VT-d+-
VT-x++
EPT++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i7-3820 and Pentium G640. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR3
Maximum memory size64.23 GB32 GB
Max memory channels42
Maximum memory bandwidth51.2 GB/s17 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardno dataIntel HD Graphics for 2nd Generation Intel Processors
Graphics max frequencyno data1.1 GHz

Graphics interfaces

Available interfaces and connections of Core i7-3820 and Pentium G640 integrated GPUs.

Number of displays supportedno data2

Peripherals

Specifications and connection of peripherals supported by Core i7-3820 and Pentium G640.

PCIe version2.02.0
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
+327%
Pentium G640 0.85

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
+328%
Pentium G640 1349

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
+44.3%
Pentium G640 431

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
+215%
Pentium G640 726

Gaming performance

Pros & cons summary


Performance score 3.63 0.85
Physical cores 4 2
Threads 8 2
Power consumption (TDP) 130 Watt 65 Watt

i7-3820 has a 327.1% higher aggregate performance score, and 100% more physical cores and 300% more threads.

Pentium G640, on the other hand, has 100% lower power consumption.

The Core i7-3820 is our recommended choice as it beats the Pentium G640 in performance tests.


Should you still have questions on choice between Core i7-3820 and Pentium G640, ask them in Comments section, and we shall answer.

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Intel Core i7-3820
Core i7-3820
Intel Pentium G640
Pentium G640

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Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


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Questions & comments

Here you can ask a question about Core i7-3820 or Pentium G640, agree or disagree with our judgements, or report an error or mismatch.