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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTX 660M Radeon HD 6970M
Red Dead Redemption 2 435% 313%
Halo: Reach 70% 31%
Cyberpunk 2077 635% 468%
Call of Duty: Modern Warfare 435% 313%
Doom Eternal 360% 255%
Microsoft Flight Simulator 635% 468%
Grand Theft Auto VI 718% 532%
Dragon Ball Z Kakarot 230% 155%
Star Wars: Jedi - Fallen Order 635% 468%
Need For Speed Heat 435% 313%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 6970M are noticeably better than the Nvidia GeForce GTX 660M.

The GeForce GTX 660M has a 155 MHz higher core clock speed than the Radeon HD 6970M, but the Radeon HD 6970M has 16 more Texture Mapping Units than the GeForce GTX 660M. As a result, the Radeon HD 6970M exhibits a 5.9 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 155 MHz higher core clock speed than the Radeon HD 6970M, but the Radeon HD 6970M has 16 more Render Output Units than the GeForce GTX 660M. As a result, the Radeon HD 6970M exhibits a 8.4 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 660M was released over a year more recently than the Radeon HD 6970M, and so the GeForce GTX 660M is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the Radeon HD 6970M.

The GeForce GTX 660M and the Radeon HD 6970M have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The Radeon HD 6970M has 51.2 GB/sec greater memory bandwidth than the GeForce GTX 660M, which means that the memory performance of the Radeon HD 6970M is much better than the GeForce GTX 660M.

The GeForce GTX 660M has 384 Shader Processing Units and the Radeon HD 6970M has 960. However, the actual shader performance of the GeForce GTX 660M is 365 and the actual shader performance of the Radeon HD 6970M is 326. The GeForce GTX 660M having 39 better shader performance is not particularly notable, as altogether the Radeon HD 6970M performs better when taking into account other relevant data.

The GeForce GTX 660M transistor size technology is 12 nm (nanometers) smaller than the Radeon HD 6970M. This means that the GeForce GTX 660M is expected to run slightly cooler and achieve higher clock frequencies than the Radeon HD 6970M.

The GeForce GTX 660M requires 50 Watts to run and the Radeon HD 6970M requires 75 Watts. The Radeon HD 6970M requires 25 Watts more than the GeForce GTX 660M to run. The difference is not significant enough for the Radeon HD 6970M to have a noticeably larger impact on your yearly electricity bills than the GeForce GTX 660M.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed835 MHzvs680 MHz
Boost Clock950 MHzvs-
ArchitectureKepler GK107-N13E-GE-A2Terascale 2 Blackcomb XT
OC Potential Poor vs Fair
Driver Support Good vs Poor
Release Date22 Mar 2012vs04 Jan 2011
GPU LinkGD LinkGD Link

Resolution Performance

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GPU Memory

Memory2048 MBvs2048 MB
Memory Speed1000 MHzvs900 MHz
Memory Bus128 Bitvs256 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth64GB/secvs115.2GB/sec
L2 Cache 256 KB vs green tick 512 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units384vs960
Actual Shader Performance18%vs16%
Texture Mapping Units32vs48
Texture Rate26.7 GTexel/svs32.6 GTexel/s
Render Output Units16vs32
Pixel Rate13.4 GPixel/svs21.8 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs1600x900
VGA Connections0vs1
DVI Connections0vs2
HDMI Connections0vs1
DisplayPort Connections-vs-

GPU Power Requirements

Max Power50 Wattsvs75 Watts
Recommended PSU--

GPU Features

Shader Model5.0vs5.0
Open GL4.5vs4.3
Open CL-vs-
Notebook GPUyesyes

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-3360M 2.8GHzvsIntel Core i7-2630QM 4-Core 2.0GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1600x900vs1920x1080

Gaming Performance Value

The Elder Scrolls Vvs
The Witcher IIvs
Battlefield 3vs
Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GTX 660M is a Fast-Middle-Class Mobile Graphics Card based on the first revision of the Kepler 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.

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.

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.

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.

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.
Radeon HD 6970M is a high-end GPU based on the 40nm Terrascale 2 architecture.
It's based on the Barts Core (therefore related to Radeon HD 6850) and offers 980 Shader Processing Units, 48 TMUs and 32 ROPs on a 256-bit memory interface of fast GDDR5. Its central clock runs at 680MHz and the memory clock operates at 900MHz.
Despite being based on the same Core used on Radeon HD 6850, its performance is more comparable to Radeon HD 6790 due to being heavily underclocked.
Most of today's modern games are playable at the highest settings but some exceptions will require lower resolutions or modest presets to be played optimally.
Recommended CPU
Possible GPU Upgrades
GPU Variants