Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTX 880M 8GB GeForce GTX 660M
Red Dead Redemption 2 88% 435%
Halo: Reach 40% 70%
Cyberpunk 2077 158% 635%
Call of Duty: Modern Warfare 88% 435%
Doom Eternal 61% 360%
Microsoft Flight Simulator 158% 635%
Grand Theft Auto VI 187% 718%
Dragon Ball Z Kakarot 16% 230%
Star Wars: Jedi - Fallen Order 158% 635%
Need For Speed Heat 88% 435%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 880M 8GB are massively better than the Nvidia GeForce GTX 660M.

The GTX 880M has a 119 MHz higher core clock speed and 96 more Texture Mapping Units than the GeForce GTX 660M. This results in the GTX 880M providing 95.4 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 880M has a 119 MHz higher core clock speed and 16 more Render Output Units than the GeForce GTX 660M. This results in the GTX 880M providing 17.1 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 880M was released over a year more recently than the GeForce GTX 660M, and so the GTX 880M 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 880M 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 880M also has superior memory performance overall.

The GTX 880M has 96 GB/sec greater memory bandwidth than the GeForce GTX 660M, which means that the memory performance of the GTX 880M is massively better than the GeForce GTX 660M.

The GeForce GTX 880M 8GB has 1536 Shader Processing Units and the GeForce GTX 660M has 384. However, the actual shader performance of the GTX 880M is 1525 and the actual shader performance of the GeForce GTX 660M is 365. The GTX 880M having 1160 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 880M delivers a massively smoother and more efficient experience when processing graphical data than the GeForce GTX 660M.

The GeForce GTX 880M 8GB requires 122 Watts to run and the GeForce GTX 660M requires 50 Watts. The GTX 880M requires 72 Watts more than the GeForce GTX 660M to run. The difference is significant enough that the GTX 880M 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 Speed954 MHzvs835 MHz
Boost Clock993 MHzvs950 MHz
ArchitectureKepler GK104Kepler GK107-N13E-GE-A2
OC Potential Poor vs Poor
Driver Support Good vs Good
Release Date12 Mar 2014vs22 Mar 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
10
green tick vs
7.9
1600x900
9.6
green tick vs
5.9
1920x1080
7.6
green tick vs
4.4
2560x1440
5.5
green tick vs
2.8
3840x2160
3.8
green tick vs
1.8

GPU Memory

Memory8192 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 Performance73%vs18%
Technology28nmvs28nm
Texture Mapping Units128vs32
Texture Rate122.1 GTexel/svs26.7 GTexel/s
Render Output Units32vs16
Pixel Rate30.5 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 i7-4900MQ 4-Core 2.8GHzvsIntel Core i5-3360M 2.8GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1920x1080vs1600x900

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewGeForce GTX 880M 8GB is a high-end mobile graphics card and the fastest as of Spring 2014.
It is based on a full variant of the GK104 Core of the 28nm Kepler architecture and thus offers 1536 Shader Processing Units, 128 TMUs and 32 ROPs, on a 256-bit memory interface of fast GDDR5. While the central unit runs at 954MHz and goes up to 993MHz, in Turbo Mode, the memory clock operates at 1250MHz. The rated TDP is clearly above 100W and 122W, on average.
It is thus just a faster clocked GeForce GTX 780M. Theoretically, its performance might be up to 15% better than its predecessors, but since its memory bandwidth remains the same, expect at most a 10% performance boost, depending on the 3D Game.
Therefore, GeForce GTX 880M will only be seen on very large note books and it needs to be paired with at least 8GB of RAM and a Strong Quad Core. The card is suited for 1080p and even the most demanding games should run fluently at high settings.
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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