Intel Core i7-3940XM vs Intel Pentium Gold G6405T

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CPU comparison with benchmarks


Intel Core i7-3940XM CPU1 vs CPU2 Intel Pentium Gold G6405T
Intel Core i7-3940XM Intel Pentium Gold G6405T

CPU comparison

In this CPU comparison, we compare the Intel Core i7-3940XM and the Intel Pentium Gold G6405T and use benchmarks to check which processor is faster.

We compare the Intel Core i7-3940XM 4 core processor released in Q3/2012 with the Intel Pentium Gold G6405T which has 2 CPU cores and was introduced in Q1/2021.
Intel Core i7 Extreme Edition (24) Family Intel Pentium (150)
Intel Core i 3000M (29) CPU group Intel Pentium G6000 (12)
3 Generation 10
Ivy Bridge H Architecture Comet Lake S
Mobile Segment Desktop / Server
-- Predecessor --
-- Successor --

CPU Cores and Base Frequency

The Intel Core i7-3940XM is a 4 core processor with a clock frequency of 3.00 GHz (3.90 GHz). The processor can compute 8 threads at the same time. The Intel Pentium Gold G6405T clocks with 3.50 GHz, has 2 CPU cores and can calculate 4 threads in parallel.

Intel Core i7-3940XM Characteristic Intel Pentium Gold G6405T
4 Cores 2
8 Threads 4
normal Core architecture normal
Yes Hyperthreading Yes
Yes Overclocking ? No
3.00 GHz Frequency 3.50 GHz
3.90 GHz Turbo Frequency (1 Core) --
-- Turbo Frequency (All Cores) --

Artificial Intelligence and Machine Learning

Processors with the support of artificial intelligence (AI) and machine learning (ML) can process many calculations, especially audio, image and video processing, much faster than classic processors. Algorithms for ML improve their performance the more data they have collected via software. ML tasks can be processed up to 10,000 times faster than with a classic processor.

Intel Core i7-3940XM Characteristic Intel Pentium Gold G6405T
-- AI hardware --
-- AI specifications --

Internal Graphics

Graphics (iGPU) integrated into the processor not only enable image output without having to rely on a dedicated graphics solution, but can also efficiently accelerate video playback.

Intel HD Graphics 4000 GPU Intel HD Graphics 610
0.65 GHz GPU frequency 0.35 GHz
1.35 GHz GPU (Turbo) 1.05 GHz
7 GPU Generation 9.5
22 nm Technology 14 nm
3 Max. displays 3
16 Compute units 12
128 Shader 96
No Hardware Raytracing No
No Frame Generation No
2 GB Max. GPU Memory 32 GB
11.0 DirectX Version 12

Hardware codec support

A photo or video codec that is accelerated in hardware can greatly accelerate the working speed of a processor and extend the battery life of notebooks or smartphones when playing videos.

Intel HD Graphics 4000 GPU Intel HD Graphics 610
No Codec h265 / HEVC (8 bit) Decode / Encode
No Codec h265 / HEVC (10 bit) Decode / Encode
Decode / Encode Codec h264 Decode / Encode
No Codec VP9 Decode / Encode
No Codec VP8 Decode / Encode
No Codec AV1 No
Decode / Encode Codec AVC Decode / Encode
Decode Codec VC-1 Decode
Decode Codec JPEG Decode / Encode

Memory & PCIe

Up to 32 GB of memory in a maximum of 2 memory channels is supported by the Intel Core i7-3940XM, while the Intel Pentium Gold G6405T supports a maximum of 128 GB of memory with a maximum memory bandwidth of 42.7 GB/s enabled.

Intel Core i7-3940XM Characteristic Intel Pentium Gold G6405T
DDR3L-1333, DDR3L-1600, DDR3-1333, DDR3-1600 Memory DDR4-2666
32 GB Max. Memory 128 GB
2 (Dual Channel) Memory channels 2 (Dual Channel)
25.6 GB/s Max. Bandwidth 42.7 GB/s
No ECC Yes
-- L2 Cache --
8.00 MB L3 Cache 4.00 MB
3.0 PCIe version 3.0
16 PCIe lanes 16
15.8 GB/s PCIe Bandwidth 15.8 GB/s

Thermal Management

The Intel Core i7-3940XM has a TDP of 55 W. The TDP of the Intel Pentium Gold G6405T is 35 W. System integrators use the TDP of the processor as a guide when dimensioning the cooling solution.

Intel Core i7-3940XM Characteristic Intel Pentium Gold G6405T
55 W TDP (PL1 / PBP) 35 W
-- TDP (PL2) --
-- TDP up --
-- TDP down 25 W
105 °C Tjunction max. 100 °C

Technical details

The Intel Core i7-3940XM has 8.00 MB cache and is manufactured in 22 nm. The cache of Intel Pentium Gold G6405T is at 4.00 MB. The processor is manufactured in 14 nm.

Intel Core i7-3940XM Characteristic Intel Pentium Gold G6405T
22 nm Technology 14 nm
Monolithic Chip design Monolithic
x86-64 (64 bit) Instruction set (ISA) x86-64 (64 bit)
SSE4.1, SSE4.2, AVX ISA extensions SSE4.1, SSE4.2
PGA 988 Socket LGA 1200
VT-x, VT-x EPT Virtualization VT-x, VT-x EPT, VT-d
Yes AES-NI Yes
Windows 10, Linux Operating systems Windows 10, Windows 11, Linux
Q3/2012 Release date Q1/2021
-- Release price 77 $
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Average performance in benchmarks

⌀ Single core performance in 2 CPU benchmarks
⌀ Multi core performance in 3 CPU benchmarks

Geekbench 5, 64bit (Single-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The single-core test only uses one CPU core, the amount of cores or hyperthreading ability doesn't count.
Intel Core i7-3940XM Intel Core i7-3940XM
4C 8T @ 3.90 GHz
799 (90%)
Intel Pentium Gold G6405T Intel Pentium Gold G6405T
2C 4T @ 3.50 GHz
889 (100%)

Geekbench 5, 64bit (Multi-Core)

Geekbench 5 is a cross plattform benchmark that heavily uses the systems memory. A fast memory will push the result a lot. The multi-core test involves all CPU cores and taks a big advantage of hyperthreading.
Intel Core i7-3940XM Intel Core i7-3940XM
4C 8T @ 3.00 GHz
3310 (100%)
Intel Pentium Gold G6405T Intel Pentium Gold G6405T
2C 4T @ 3.50 GHz
1935 (58%)

Geekbench 6 (Single-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The single-core benchmark only evaluates the performance of the fastest CPU core, the number of CPU cores in a processor is irrelevant here.
Intel Core i7-3940XM Intel Core i7-3940XM
4C 8T @ 3.90 GHz
694 (91%)
Intel Pentium Gold G6405T Intel Pentium Gold G6405T
2C 4T @ 3.50 GHz
762 (100%)

Geekbench 6 (Multi-Core)

Geekbench 6 is a benchmark for modern computers, notebooks and smartphones. What is new is an optimized utilization of newer CPU architectures, e.g. based on the big.LITTLE concept and combining CPU cores of different sizes. The multi-core benchmark evaluates the performance of all of the processor's CPU cores. Virtual thread improvements such as AMD SMT or Intel's Hyper-Threading have a positive impact on the benchmark result.
Intel Core i7-3940XM Intel Core i7-3940XM
4C 8T @ 3.00 GHz
2670 (100%)
Intel Pentium Gold G6405T Intel Pentium Gold G6405T
2C 4T @ 3.50 GHz
1680 (63%)

iGPU - FP32 Performance (Single-precision GFLOPS)

The theoretical computing performance of the internal graphics unit of the processor with simple accuracy (32 bit) in GFLOPS. GFLOPS indicates how many billion floating point operations the iGPU can perform per second.
Intel Core i7-3940XM Intel Core i7-3940XM
Intel HD Graphics 4000 @ 1.35 GHz
346 (100%)
Intel Pentium Gold G6405T Intel Pentium Gold G6405T
Intel HD Graphics 610 @ 1.05 GHz
202 (58%)

Estimated results for PassMark CPU Mark

Some of the CPUs listed below have been benchmarked by CPU-monkey. However the majority of CPUs have not been tested and the results have been estimated by a CPU-monkey’s secret proprietary formula. As such they do not accurately reflect the actual Passmark CPU mark values and are not endorsed by PassMark Software Pty Ltd.
Intel Core i7-3940XM Intel Core i7-3940XM
4C 8T @ 3.00 GHz
5849 (100%)
Intel Pentium Gold G6405T Intel Pentium Gold G6405T
2C 4T @ 3.50 GHz
3755 (64%)

CPU-Z Benchmark 17 (Multi-Core)

The CPU-Z benchmark measures a processor's performance by measuring the time it takes the system to complete all benchmark calculations. The faster the benchmark is completed, the higher the score.
Intel Core i7-3940XM Intel Core i7-3940XM
4C 8T @ 3.00 GHz
1790 (100%)
Intel Pentium Gold G6405T Intel Pentium Gold G6405T
2C 4T @ 3.50 GHz
0 (0%)

Devices using this processor

Intel Core i7-3940XM Intel Pentium Gold G6405T
Unknown Unknown

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