Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTX 980MX 8GB GeForce GTX 660M
Halo: Reach 62% 70%
Cyberpunk 2077 63% 635%
Red Dead Redemption 2 19% 435%
Dragon Ball Z Kakarot 27% 230%
Call of Duty: Modern Warfare 19% 435%
Microsoft Flight Simulator 63% 635%
Doom Eternal 2% 360%
Grand Theft Auto VI 82% 718%
FIFA 20 37% 185%
Need For Speed Heat 19% 435%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 980MX 8GB are massively better than the Nvidia GeForce GTX 660M.

The GTX 980MX has a 203 MHz higher core clock speed and 72 more Texture Mapping Units than the GeForce GTX 660M. This results in the GTX 980MX providing 81.3 GTexel/s better texturing performance. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GTX 980MX has a 203 MHz higher core clock speed and 48 more Render Output Units than the GeForce GTX 660M. This results in the GTX 980MX providing 53 GPixel/s better pixeling performance. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GTX 980MX was released over three years more recently than the GeForce GTX 660M, and so the GTX 980MX is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the GeForce GTX 660M when running the latest games.

The GTX 980MX has 6144 MB more video memory than the GeForce GTX 660M, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GTX 980MX also has superior memory performance overall.

The GTX 980MX has 96.4 GB/sec greater memory bandwidth than the GeForce GTX 660M, which means that the memory performance of the GTX 980MX is massively better than the GeForce GTX 660M.

The GeForce GTX 980MX 8GB has 1664 Shader Processing Units and the GeForce GTX 660M has 384. However, the actual shader performance of the GTX 980MX is 2534 and the actual shader performance of the GeForce GTX 660M is 365. The GTX 980MX having 2169 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 980MX delivers a massively smoother and more efficient experience when processing graphical data than the GeForce GTX 660M.

The GeForce GTX 980MX 8GB requires 122 Watts to run and the GeForce GTX 660M requires 50 Watts. The GTX 980MX requires 72 Watts more than the GeForce GTX 660M to run. The difference is significant enough that the GTX 980MX 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 Speed1038 MHzvs835 MHz
Boost Clock1128 MHzvs950 MHz
ArchitectureMaxwell GM204Kepler GK107-N13E-GE-A2
OC Potential None vs Poor
Driver Support Great vs Good
Release Date01 Jun 2016vs22 Mar 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - vs green tick
7.9
1600x900 - vs green tick
5.9
1920x1080
9.4
green tick vs
4.4
2560x1440 - vs green tick
2.8
3840x2160 - vs green tick
1.8

GPU Memory

Memory8192 MBvs2048 MB
Memory Speed1253 MHzvs1000 MHz
Memory Bus256 Bitvs128 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth160.4GB/secvs64GB/sec
L2 Cache 2048 KB green tick vs 256 KB
Delta Color Compression yes vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units1664vs384
Actual Shader Performance100%vs18%
Technology28nmvs28nm
Texture Mapping Units104vs32
Texture Rate108 GTexel/svs26.7 GTexel/s
Render Output Units64vs16
Pixel Rate66.4 GPixel/svs13.4 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs0
DVI Connections0vs0
HDMI Connections0vs0
DisplayPort Connections0vs-
Comparison

GPU Power Requirements

Max Power122 Wattsvs50 Watts
Recommended PSU--

GPU Features

DirectX12.1vs12.0
Shader Model5.0vs5.0
Open GL4.5vs4.5
Open CL-vs-
Notebook GPUyesyes
SLI/Crossfireyesvsyes
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i7-6920HQ 4-Core 2.9GHzvsIntel 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 980MX 8GB is a High-End Mobile Graphics Card based on the First Revision of the Maxwell architecture.

Architecture
GeForce GTX 980MX 8GB Features a GPU Codenamed GM204-??? which is a Second Gen Maxwell GPU and is identical to the GM204-200-A1 used on the Desktop GeForce GTX 970.
It has 13 Stream Multiprocessors activated and offers 1664 Shader Processing Units, 104 TMUs and 64 ROPs.

GPU
The central unit runs at ????MHz and goes up to ????MHz, in Turbo Mode.

Memory: Speed
The GPU is equipped with fast GDDR5 and Accesses the Frame Buffer through a 256-bit Memory Interface. The Memory Clock Operates at 1250MHz.

Memory: Frame Buffer
The GPU can fill up a Memory Pool of up to 8GB.

Power Consumption
With a rated board TDP of 122W, it may only be used on Very Large Notebooks.

Performance
Product Not Released Yet.

System Suggestions
GeForce GTX 980MX 8GB is best suited for resolutions up to and including 1920x1080. We recommend a High-End Processor and 8GB of RAM for Optimal Performance.
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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