Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTX 680MX GeForce GTX 660M
Red Dead Redemption 2 118% 435%
Cyberpunk 2077 200% 635%
Doom Eternal 88% 360%
Dragon Ball Z Kakarot 35% 230%
Call of Duty: Modern Warfare 118% 435%
Microsoft Flight Simulator 200% 635%
FIFA 20 16% 185%
Grand Theft Auto VI 234% 718%
Star Wars: Jedi - Fallen Order 200% 635%
Need For Speed Heat 118% 435%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 680MX are massively better than the Nvidia GeForce GTX 660M.

The GeForce GTX 660M has a 116 MHz higher core clock speed than the GeForce GTX 680MX, but the GeForce GTX 680MX has 96 more Texture Mapping Units than the GeForce GTX 660M. As a result, the GeForce GTX 680MX exhibits a 65.3 GTexel/s better Texture Fill Rate than the GeForce GTX 660M. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GeForce GTX 660M has a 116 MHz higher core clock speed than the GeForce GTX 680MX, but the GeForce GTX 680MX has 16 more Render Output Units than the GeForce GTX 660M. As a result, the GeForce GTX 680MX exhibits a 9.6 GPixel/s better Pixel Fill Rate than the GeForce GTX 660M. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GeForce GTX 680MX was released less than a year after the GeForce GTX 660M, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The GeForce GTX 680MX and the GeForce GTX 660M 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 680MX has 96 GB/sec greater memory bandwidth than the GeForce GTX 660M, which means that the memory performance of the GeForce GTX 680MX is massively better than the GeForce GTX 660M.

The GeForce GTX 680MX has 1536 Shader Processing Units and the GeForce GTX 660M has 384. However, the actual shader performance of the GeForce GTX 680MX is 1104 and the actual shader performance of the GeForce GTX 660M is 365. The GeForce GTX 680MX having 739 better shader performance and an altogether better performance when taking into account other relevant data means that the GeForce GTX 680MX delivers a massively smoother and more efficient experience when processing graphical data than the GeForce GTX 660M.

The GeForce GTX 680MX requires 122 Watts to run and the GeForce GTX 660M requires 50 Watts. The GeForce GTX 680MX requires 72 Watts more than the GeForce GTX 660M to run. The difference is significant enough that the GeForce GTX 680MX may have an adverse affect on your yearly electricity bills in comparison to the GeForce GTX 660M.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed719 MHzvs835 MHz
Boost Clock-vs950 MHz
ArchitectureKepler GK104-N13E-GTX2-A2Kepler GK107-N13E-GE-A2
OC Potential Fair vs Poor
Driver Support Good vs Good
Release Date23 Oct 2012vs22 Mar 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
10
green tick vs
7.9
1600x900
9.1
green tick vs
5.9
1920x1080
7
green tick vs
4.4
2560x1440
5.1
green tick vs
2.8
3840x2160
3.4
green tick vs
1.8

GPU Memory

Memory2048 MBvs2048 MB
Memory Speed1250 MHzvs1000 MHz
Memory Bus256 Bitvs128 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth160GB/secvs64GB/sec
L2 Cache 512 KB green tick vs 256 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units1536vs384
Actual Shader Performance53%vs18%
Technology28nmvs28nm
Texture Mapping Units128vs32
Texture Rate92 GTexel/svs26.7 GTexel/s
Render Output Units32vs16
Pixel Rate23 GPixel/svs13.4 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs0
DVI Connections0vs0
HDMI Connections0vs0
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power122 Wattsvs50 Watts
Recommended PSU--

GPU Features

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

GPU Supporting Hardware

Recommended ProcessorIntel Core i7-3820QM 4-Core 2.7GHzvsIntel Core i5-3360M 2.8GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1920x1080vs1600x900

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GTX 680MX is a High-End Mobile Graphics Card based on the first revision of 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 Codenamed Kepler Kepler GK104-N13E-GTX-A2 which has 8 Stream Multiprocessors activated and thus offers 1536 Shader Processing Units, 128 TMUs and 32 ROPs. The Central Unit is clocked at 719MHz.

Memory
The GPU accesses a 2GB frame buffer of fast GDDR5, through a 256-bit memory interface. The size of the frame buffer is adequate. The Memory Clock Operates at 1250MHz.

Features
DirectX 11.0 Support (11.0 Hardware Default) and support for SLI, Optimus, CUDA, OpenCL, DirectCompute, 3D Vision Surround, PhysX, Realtime Raytracing and other technologies

Power Consumption
With a rated board TDP of 122W, it is suited for very large sized laptops.

Performance
Gaming benchmarks indicate is not too far from the desktop GeForce GTX 660 Ti.

System Suggestions
We recommend a Power Processor (Intel Core i7 Mobile) and 8GB of RAM for a system with GeForce GTX 680MX.
Overview
GeForce GTX 660M is a Fast-Middle-Class Mobile Graphics Card based on the first revision of 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 Codenamed GK107-N13E-GE-A2 which has 2 Stream Multiprocessors activated and thus offers 384 Shader Processing Units, 32 TMUs and 16 ROPs. The Central Unit is initially clocked at 835MHz and goes up to 950MHz, in Turbo Mode.

Memory
The GPU accesses a 2GB frame buffer of fast GDDR5, through a 128-bit memory interface. The size of the frame buffer is exaggerated and no way benefits the GPU. The Memory Clock Operates at 1000MHz.

Features
DirectX 11.0 Support (11.0 Hardware Default) and support for SLI, Kepler Boost, Optimus, CUDA, OpenCL, DirectCompute, 3D Vision Surround, PhysX, Realtime Raytracing and other technologies

Power Consumption
With a rated board TDP of 45W, it is suited for average sized laptops.

Performance
Gaming benchmarks indicate its performance is not too far from the desktop GeForce GTX 650.

System Suggestions
We recommend a decent processor (Intel Core i5 Mobile) and 8GB of RAM for a system with GeForce GTX 660M.
Recommended CPU
Possible GPU Upgrades
N/A
N/A
GPU Variants
-
-

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