Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTX 980M 8GB GeForce GTX 660M
Halo: Reach 58% 70%
Cyberpunk 2077 84% 635%
Dragon Ball Z Kakarot 18% 230%
Red Dead Redemption 2 34% 435%
Call of Duty: Modern Warfare 34% 435%
Microsoft Flight Simulator 84% 635%
Doom Eternal 15% 360%
Grand Theft Auto VI 104% 718%
FIFA 20 29% 185%
Need For Speed Heat 34% 435%

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

The GTX 980M has a 203 MHz higher core clock speed and 64 more Texture Mapping Units than the GeForce GTX 660M. This results in the GTX 980M providing 72.9 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 980M has a 203 MHz higher core clock speed and 48 more Render Output Units than the GeForce GTX 660M. This results in the GTX 980M 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 980M was released over a year more recently than the GeForce GTX 660M, and so the GTX 980M is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GeForce GTX 660M.

The GTX 980M 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 980M also has superior memory performance overall.

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

The GeForce GTX 980M 8GB has 1536 Shader Processing Units and the GeForce GTX 660M has 384. However, the actual shader performance of the GTX 980M is 2337 and the actual shader performance of the GeForce GTX 660M is 365. The GTX 980M having 1972 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 980M delivers a massively smoother and more efficient experience when processing graphical data than the GeForce GTX 660M.

The GeForce GTX 980M 8GB requires 100 Watts to run and the GeForce GTX 660M requires 50 Watts. The GTX 980M requires 50 Watts more than the GeForce GTX 660M to run. The difference is significant enough that the GTX 980M may have a slight 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 Clock1127 MHzvs950 MHz
ArchitectureMaxwell GM204-N16E-GX-A2Kepler GK107-N13E-GE-A2
OC Potential Fair vs Poor
Driver Support Great vs Good
Release Date07 Oct 2014vs22 Mar 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
10
green tick vs
7.9
1600x900
10
green tick vs
5.9
1920x1080
8.9
green tick vs
4.4
2560x1440
6.6
green tick vs
2.8
3840x2160
4.9
green tick vs
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 Units1536vs384
Actual Shader Performance100%vs18%
Technology28nmvs28nm
Texture Mapping Units96vs32
Texture Rate99.6 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 Connections-vs-
Comparison

GPU Power Requirements

Max Power100 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 i7-4930MX 4-Core 3.0GHzvsIntel 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 980M 8GB is a high-end Mobile Graphics Card based on the second revision of the Maxwell architecture.

Architecture
The Second variant of the Maxwell Architecture, despite being also manufactured with a 28nm technology, has an extremely large L2 Cache and features a Third Generation Delta Color Compression 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.
The Second Revision of Maxwell also adds the VXGI (Voxel Global Illumination) Technology which makes scenes significantly more lifelike and believable as light interacts more realistically in the game environment and the MFAA Technology which provides the same effect as MSAA but at a much lower performance cost.

GPU
It equips a GPU codenamed GM204-N16E-GX-A2 which has 12 SM activated and thus offers 1536 Shader Processing Units, 96 TMUs and 64 ROPs. The central unit runs at 1038MHz and goes up to 1127MHz, in Turbo Mode.

Memory
The GPU accesses a 8GB frame buffer of fast GDDR5, through a 256-bit memory interface. The memory clock operates at 1253MHz. The size of the frame buffer is exaggerated and in no way adds extra performance.

Features
DirectX 12.0 Support (11.2 Hardware Default) and support for SLI, GameStream, G-SYNC, GPU Boost 2.0, GeForce Experience, PhysX and other technologies.

Power Consumption
With a rated board TDP of 100W, it will only be equipped in very large notebooks.

Performance
Benchmarks indicate its performance is over 30% faster than GeForce GTX 880M. Therefore, it should even surpass GeForce GTX 770 and be around as fast as desktop GeForce GTX 780.
GeForce GTX 980M is therefore the fastest mobile Graphics Card as of October 2014 and AMD's Radeon R9 M290X is beaten in over 40%.

System Suggestions
We recommend a very strong processor (Intel Core i7 Mobile Quad Core) and 8GB of RAM for a notebook with GeForce GTX 980M 8GB.
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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