Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce 940M 2GB GeForce GTX 660
Cyberpunk 2077 528% 131%
Hitman 3 717% 200%
Resident Evil 8 528% 131%
Assassins Creed: Valhalla 474% 111%
FIFA 21 217% 16%
Grand Theft Auto VI 783% 224%
Call of Duty: Black Ops Cold War 456% 104%
Genshin Impact 528% 131%
Far Cry 6 808% 234%
The Medium 683% 188%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 660 are massively better than the Nvidia GeForce 940M 2GB.

The GeForce 940M 2GB has a 92 MHz higher core clock speed than the GeForce GTX 660, but the GeForce GTX 660 has 56 more Texture Mapping Units than the GeForce 940M 2GB. As a result, the GeForce GTX 660 exhibits a 52.7 GTexel/s better Texture Fill Rate than the GeForce 940M 2GB. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GeForce 940M 2GB has a 92 MHz higher core clock speed than the GeForce GTX 660, but the GeForce GTX 660 has 16 more Render Output Units than the GeForce 940M 2GB. As a result, the GeForce GTX 660 exhibits a 14.9 GPixel/s better Pixel Fill Rate than the GeForce 940M 2GB. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GeForce 940M 2GB was released over a year more recently than the GeForce GTX 660, and so the GeForce 940M 2GB is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GeForce GTX 660.

The GeForce 940M 2GB and the GeForce GTX 660 have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The GeForce GTX 660 has 128.2 GB/sec greater memory bandwidth than the GeForce 940M 2GB, which means that the memory performance of the GeForce GTX 660 is massively better than the GeForce 940M 2GB.

The GeForce 940M 2GB has 384 Shader Processing Units and the GeForce GTX 660 has 960. However, the actual shader performance of the GeForce 940M 2GB is 610 and the actual shader performance of the GeForce GTX 660 is 992. The GeForce GTX 660 having 382 better shader performance and an altogether better performance when taking into account other relevant data means that the GeForce GTX 660 delivers a massively smoother and more efficient experience when processing graphical data than the GeForce 940M 2GB.

The GeForce 940M 2GB requires 30 Watts to run and the GeForce GTX 660 requires 140 Watts. We would recommend a PSU with at least 450 Watts for the GeForce GTX 660, but we do not have a recommended PSU wattage for the GeForce 940M 2GB. The GeForce GTX 660 requires 110 Watts more than the GeForce 940M 2GB to run. The difference is significant enough that the GeForce GTX 660 may have an adverse affect on your yearly electricity bills in comparison to the GeForce 940M 2GB.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1072 MHzvs980 MHz
Boost Clock1176 MHzvs1033 MHz
ArchitectureMaxwell GM108-N16S-GT-SKepler GK106-400-A1
OC Potential Poor vs Good
Driver Support Great vs Good
Release Date13 Mar 2015vs13 Sep 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
7.2
vs green tick
10
1600x900
5.5
vs green tick
8.9
1920x1080
4.1
vs green tick
7
2560x1440
2.7
vs green tick
5.1
3840x2160
1.8
vs green tick
3.4

GPU Memory

Memory2048 MBvs2048 MB
Memory Speed1000 MHzvs1502 MHz
Memory Bus64 Bitvs192 Bit
Memory TypeDDR3vsGDDR5
Memory Bandwidth16GB/secvs144.2GB/sec
L2 Cache 2048 KB green tick vs 384 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units384vs960
Actual Shader Performance29%vs48%
Technology28nmvs28nm
Texture Mapping Units24vs80
Texture Rate25.7 GTexel/svs78.4 GTexel/s
Render Output Units8vs24
Pixel Rate8.6 GPixel/svs23.5 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs0
DVI Connections0vs2
HDMI Connections0vs1
DisplayPort Connections0vs0
Comparison

GPU Power Requirements

Max Power30 Wattsvs140 Watts
Recommended PSU-450 Watts & 33 Amps

GPU Features

DirectX12.0vs12.0
Shader Model5.0vs5.0
Open GL4.5vs4.5
Open CL-vs-
Notebook GPUyesno
SLI/Crossfirenovsyes
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-4110M 2.6GHzvsIntel Core i5-3470 3.2GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1366x768vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce 940M 2GB is a Middle-Class Mobile Graphics Card based on the First Revision of the Maxwell architecture.

Architecture
The Maxwell architecture features many improvements and among them is the extremely large L2 Cache which allows NVIDIA to produce Graphics Cards with relatively small memory data transfer rates, without causing too much impact on the overall performance. Furthermore, the Shaders have been redesigned and are both more powerful and energy efficient.

GPU
It equips a GPU Codenamed GM108-N16S-GT-S which has 3 SM activated and thus offers 384 Shader Processing Units, 24 TMUs and 8 ROPs. The central unit runs at 1072MHz and goes up to 1176MHz, in Turbo Mode.

Memory
The GPU accesses a 2GB frame buffer of DDR3, through a 64-bit memory interface. The Frame Buffer is exaggerated and in no way benefits the GPU. The memory clock operates at 1000MHz.

Features
DirectX 11.2 Support (11.0 Hardware Default) and support for GPU Boost 2.0, GeForce Experience, PhysX and other technologies.

Power Consumption
With a rated board TDP of 30W, it will only be equipped in average sized notebooks.

Performance
GeForce 940M 2GB is essentially a higher-clocked GeForce 840M 2GB. Because of that, it is only slightly faster than its predecessor. Modern games are expected to run at Medium Settings while demanding games will required further reduced settings.

System Suggestions
We recommend a modest processor (Intel Core i3 Mobile) and 4GB of RAM for a notebook with GeForce 940M 2GB.
Overview
GeForce GTX 660 is a Performance Graphics Card based on the Kepler Architecture.

Architecture
The Kepler Architecture was NVIDIA's big step to power efficiency. Each Stream Multiprocessor (SMX) now hosts 192 Shader Processing Units - against the 48 of older Fermi Architecture, and has been redesigned being now clocked at the same speed of the Central Unit. This means they are more energy efficient and will consequently lead to cooler operating temperatures. However, it also means they are weaker. It can be said that one Fermi SMX is as fast as 2 Kepler SMXs.
Additionally, and not available in all GPUs, Kepler also introduced the Boost Clock Feature. The Boost Clock is an even higher Clock Speed activated when in gaming mode and becomes the effective speed of the GPU. GPU
It equips a GPU GK106-400-A1 which has 5 Stream Multiprocessors activated and thus offers 960 Shader Processing Units, 80 TMUs and 24 ROPs. The Central Unit is initially clocked at 980MHz and goes up to 1033MHz, in Turbo Mode.

Memory
The GPU accesses a 2GB frame buffer of fast GDDR5, through a 192-bit memory interface. The size of the frame buffer is adequate. The Memory Clock Operates at 1502MHz.

Power Consumption
With a rated board TDP of 140W, it requires at least a 450W PSU with one available 6-pin connector.

Performance
GeForce GTX 660 competes with Radeon HD 7850.
At 1920x1080, the best suited resolution for GeForce GTX 660, benchmarks indicate its performance is a little over the older GeForce GTX 570 and quite superior to Radeon HD 7850.

System Suggestions
GeForce GTX 660 is best suited for resolutions up to and including 1920x1080. We recommend a Strong Processor and 8GB of RAM for Optimal Performance.
Recommended CPU
Possible GPU Upgrades
N/A
GPU Variants
-