Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 8790M GeForce GTX 660M
Red Dead Redemption 2 463% 435%
Halo: Reach 79% 70%
Cyberpunk 2077 674% 635%
Call of Duty: Modern Warfare 463% 435%
Doom Eternal 384% 360%
Microsoft Flight Simulator 674% 635%
Grand Theft Auto VI 761% 718%
Dragon Ball Z Kakarot 247% 230%
Star Wars: Jedi - Fallen Order 674% 635%
Need For Speed Heat 463% 435%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 660M are marginally better than the AMD Radeon HD 8790M.

The Radeon HD 8790M has a 15 MHz higher core clock speed than the GeForce GTX 660M, but the GeForce GTX 660M has 8 more Texture Mapping Units than the Radeon HD 8790M. As a result, the GeForce GTX 660M exhibits a 6.3 GTexel/s better Texture Fill Rate than the Radeon HD 8790M. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The Radeon HD 8790M has a 15 MHz higher core clock speed than the GeForce GTX 660M, but the GeForce GTX 660M has 8 more Render Output Units than the Radeon HD 8790M. As a result, the GeForce GTX 660M exhibits a 6.6 GPixel/s better Pixel Fill Rate than the Radeon HD 8790M. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The Radeon HD 8790M was released over a year more recently than the GeForce GTX 660M, and so the Radeon HD 8790M 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 Radeon HD 8790M and the GeForce GTX 660M have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The memory bandwidth of the Radeon HD 8790M and the GeForce GTX 660M are the same, which means the Radeon HD 8790M and the GeForce GTX 660M have equal limitations when it comes to graphical data transfer.

Both the Radeon HD 8790M and the GeForce GTX 660M have 384 Shader Processing Units. While the two GPUs have the same number of SPUs, the actual performance delivered by the GeForce GTX 660M is 365 and by the Radeon HD 8790M is 365. Knowing that the shader performance of the GeForce GTX 660M is superior, it is not necessary to examine the GPUs' respective Texture and Pixel Fill Rates.

The Radeon HD 8790M requires 35 Watts to run and the GeForce GTX 660M requires 50 Watts. The GeForce GTX 660M requires 15 Watts more than the Radeon HD 8790M to run. The difference is not significant enough for the GeForce GTX 660M to have a noticeably larger impact on your yearly electricity bills than the Radeon HD 8790M.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed850 MHzvs835 MHz
Boost Clock900 MHzvs950 MHz
ArchitectureGCN 1.1 Mars XTXKepler GK107-N13E-GE-A2
OC Potential Poor vs Poor
Driver Support Great vs Good
Release Date01 Apr 2013vs22 Mar 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
7.4
vs green tick
7.9
1600x900
5.6
vs green tick
5.9
1920x1080
4.2
vs green tick
4.4
2560x1440
2.7
vs green tick
2.8
3840x2160
1.8
green tick vs green tick
1.8

GPU Memory

Memory2048 MBvs2048 MB
Memory Speed1000 MHzvs1000 MHz
Memory Bus128 Bitvs128 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth64GB/secvs64GB/sec
L2 Cache 256 KB green tick 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 Units384vs384
Actual Shader Performance14%vs18%
Technology28nmvs28nm
Texture Mapping Units24vs32
Texture Rate20.4 GTexel/svs26.7 GTexel/s
Render Output Units8vs16
Pixel Rate6.8 GPixel/svs13.4 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs4096x2160
VGA Connections0vs0
DVI Connections0vs0
HDMI Connections0vs0
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power35 Wattsvs50 Watts
Recommended PSU--

GPU Features

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

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-3360M 2.8GHzvsIntel Core i5-3360M 2.8GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1600x900vs1600x900

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
Radeon HD 8790M is a Fast-Middle-Class Mobile Graphics Card based on the Second Revision of the GCN Architecture.

Architecture
The GCN 1.1 Release adds support for AMD's TrueAudio Technology which does calculations of audio effects "better" than the CPU and further improves the Powertune Technology.

GPU
It equips a GPU codenamed Mars XTX which has 6 Compute Units activated and thus offers 384 Shader Processing Units, 24 TMUs and 8 ROPs. The Central Unit Initially Operates at 850MHz and goes up to 900MHz, 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 adequate. The memory clock operates at 1000MHz.

Features
DirectX 11.0 Support (11.0 Hardware Default) and support for Crossfire, PowerTune Technology, Eyefinity, App Acceleration, HD3D, ZeroCore Power and other technologies.

Power Consumption
With a rated board TDP of 35W, it is suited for 15" or larger laptops.

Performance
Gaming benchmarks put its performance slightly below NVIDIA's GeForce GTX 660M.

System Suggestions
We recommend a Decent Processor (Intel Core i5 Mobile) and 8GB of RAM for a system with Radeon HD 8790M.
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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