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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTX 780M SLI GeForce GTX 660M
Cyberpunk 2077 56% 635%
Halo: Reach 64% 70%
Red Dead Redemption 2 14% 435%
Call of Duty: Modern Warfare 14% 435%
Doom Eternal 2% 360%
Dragon Ball Z Kakarot 30% 230%
Microsoft Flight Simulator 56% 635%
FIFA 20 39% 185%
Need For Speed Heat 14% 435%
Grand Theft Auto VI 74% 718%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 780M SLI are massively better than the Nvidia GeForce GTX 660M.

The GeForce GTX 660M has a 64 MHz higher core clock speed than the GTX 780M, but the GTX 780M has 224 more Texture Mapping Units than the GeForce GTX 660M. As a result, the GTX 780M exhibits a 170.7 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 64 MHz higher core clock speed than the GTX 780M, but the GTX 780M has 48 more Render Output Units than the GeForce GTX 660M. As a result, the GTX 780M exhibits a 35.9 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 GTX 780M was released over a year more recently than the GeForce GTX 660M, and so the GTX 780M 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 780M 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 780M also has superior memory performance overall.

The GTX 780M has 256 GB/sec greater memory bandwidth than the GeForce GTX 660M, which means that the memory performance of the GTX 780M is massively better than the GeForce GTX 660M.

The GeForce GTX 780M SLI has 3072 Shader Processing Units and the GeForce GTX 660M has 384. However, the actual shader performance of the GTX 780M is 2448 and the actual shader performance of the GeForce GTX 660M is 365. The GTX 780M having 2083 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 780M delivers a massively smoother and more efficient experience when processing graphical data than the GeForce GTX 660M.

The GeForce GTX 780M SLI requires 200 Watts to run and the GeForce GTX 660M requires 50 Watts. The GTX 780M requires 150 Watts more than the GeForce GTX 660M to run. The difference is significant enough that the GTX 780M 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 Speed771 MHzvs835 MHz
Boost Clock797 MHzvs950 MHz
ArchitectureKepler GK104 (x2)Kepler GK107-N13E-GE-A2
OC Potential Fair vs Poor
Driver Support - vs Good
Release Date30 May 2013vs22 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
9.6
green tick vs
4.4
2560x1440
7.2
green tick vs
2.8
3840x2160
5.4
green tick vs
1.8

GPU Memory

Memory8192 MBvs2048 MB
Memory Speed1250 MHzvs1000 MHz
Memory Bus512 Bitvs128 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth320GB/secvs64GB/sec
L2 Cache 0 KB vs green tick 256 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units3072vs384
Actual Shader Performance100%vs18%
Technology28nmvs28nm
Texture Mapping Units256vs32
Texture Rate197.4 GTexel/svs26.7 GTexel/s
Render Output Units64vs16
Pixel Rate49.3 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 Power200 Wattsvs50 Watts
Recommended PSU--

GPU Features

DirectX11.1vs12.0
Shader Model5.0vs5.0
Open GL4.3vs4.5
Open CL-vs-
Notebook GPUyesyes
SLI/Crossfirenovsyes
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 Resolution2560x1600vs1600x900

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewGeForce GTX 780M SLI is a combination of 2 GeForce GTX 780M put together using NVIDIA's SLI technology.
Together, this combination offers 3072 Shader Processing Units, 256 TMUs and 64 ROPs. This, on a 256-bit memory interface, per card, of fast GDDR5. While the central unit runs at 771MHz and goes up to 797MHz, in Turbo Mode, the memory clock operates at 1250MHz.
Best case scenario, this combination is expected to offer similar perform to a single desktop GeForce GTX Titan but ultimately, its performance depends on the driver support and on the 3D application.
Therefore, and paired with a powerful processor, all demanding games should be playable at the highest settings. Still, this combination might surpass the 220W barrier of TDP and so only a few laptops will offer it.
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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