Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 7970M Crossfire GeForce GTX 660M
Red Dead Redemption 2 53% 435%
Doom Eternal 31% 360%
Cyberpunk 2077 110% 635%
Call of Duty: Modern Warfare 53% 435%
Dragon Ball Z Kakarot 6% 230%
Microsoft Flight Simulator 110% 635%
Star Wars: Jedi - Fallen Order 110% 635%
Grand Theft Auto VI 134% 718%
Need For Speed Heat 53% 435%
Warcraft 3: Reforged 94% 79%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 7970M Crossfire are massively better than the Nvidia GeForce GTX 660M.

The HD 7970M has a 15 MHz higher core clock speed and 128 more Texture Mapping Units than the GeForce GTX 660M. This results in the HD 7970M providing 109.3 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 HD 7970M has a 15 MHz higher core clock speed and 48 more Render Output Units than the GeForce GTX 660M. This results in the HD 7970M providing 41 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 HD 7970M was released less than a year after the GeForce GTX 660M, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The HD 7970M has 2048 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 HD 7970M also has superior memory performance overall.

The HD 7970M has 243.2 GB/sec greater memory bandwidth than the GeForce GTX 660M, which means that the memory performance of the HD 7970M is massively better than the GeForce GTX 660M.

The Radeon HD 7970M Crossfire has 2560 Shader Processing Units and the GeForce GTX 660M has 384. However, the actual shader performance of the HD 7970M is 1850 and the actual shader performance of the GeForce GTX 660M is 365. The HD 7970M having 1485 better shader performance and an altogether better performance when taking into account other relevant data means that the HD 7970M delivers a massively smoother and more efficient experience when processing graphical data than the GeForce GTX 660M.

The Radeon HD 7970M Crossfire requires 200 Watts to run and the GeForce GTX 660M requires 50 Watts. The HD 7970M requires 150 Watts more than the GeForce GTX 660M to run. The difference is significant enough that the HD 7970M 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 Speed850 MHzvs835 MHz
Boost Clock-vs950 MHz
ArchitectureGCN 1.0 Wimbledon XT (x2)Kepler GK107-N13E-GE-A2
OC Potential Fair vs Poor
Driver Support Good vs Good
Release Date01 May 2012vs22 Mar 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - vs green tick
7.9
1600x900
10
green tick vs
5.9
1920x1080
8.4
green tick vs
4.4
2560x1440
6.1
green tick vs
2.8
3840x2160
4.5
green tick vs
1.8

GPU Memory

Memory4096 MBvs2048 MB
Memory Speed1200 MHzvs1000 MHz
Memory Bus512 Bitvs128 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth307.2GB/secvs64GB/sec
L2 Cache 1024 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 Units2560vs384
Actual Shader Performance89%vs18%
Technology28nmvs28nm
Texture Mapping Units160vs32
Texture Rate136 GTexel/svs26.7 GTexel/s
Render Output Units64vs16
Pixel Rate54.4 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 Power200 Wattsvs50 Watts
Recommended PSU--

GPU Features

DirectX12.0vs12.0
Shader Model5.0vs5.0
Open GL4.4vs4.5
Open CL-vs-
Notebook GPUyesyes
SLI/Crossfirenovsyes
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i7-3940XM 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 ReviewRadeon HD 7970M Crossfire is a solution of two Radeon HD 7970M put together using AMD'S Crossfire technology.
Check the page of Radeon HD 7970M to know more about its chip.
Crossfire relies a lot on proper driver support and may suffer from micro-stuttering in lower frame rates (below 30). Benchmarks indicate the performance is overall, is up to twice as better as a single Radeon HD 7970M performing by itself but at times (depending whether or not the 3D game supports crossfire or in the graphics driver) it performed worse than a single Radeon HD 7970M.
Even the most demanding games will run at the highest 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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