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Gaming Performance Comparison

Recommended System Requirements
Game Radeon RX 560X 4GB Mobile GeForce GTX 660M
Halo: Reach 56% 70%
Cyberpunk 2077 90% 635%
Red Dead Redemption 2 38% 435%
Dragon Ball Z Kakarot 15% 230%
Call of Duty: Modern Warfare 38% 435%
Microsoft Flight Simulator 90% 635%
Doom Eternal 19% 360%
Grand Theft Auto VI 111% 718%
FIFA 20 26% 185%
Need For Speed Heat 38% 435%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon RX 560X 4GB Mobile are massively better than the Nvidia GeForce GTX 660M.

The RX 560X has a 340 MHz higher core clock speed and 32 more Texture Mapping Units than the GeForce GTX 660M. This results in the RX 560X providing 48.5 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 RX 560X has a 340 MHz higher core clock speed than the GeForce GTX 660M and the same number of Render Output Units. This results in the RX 560X providing 5.4 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 RX 560X was released over three years more recently than the GeForce GTX 660M, and so the RX 560X is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the GeForce GTX 660M when running the latest games.

The RX 560X 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 RX 560X also has superior memory performance overall.

The RX 560X has 48 GB/sec greater memory bandwidth than the GeForce GTX 660M, which means that the memory performance of the RX 560X is noticeably better than the GeForce GTX 660M.

The Radeon RX 560X 4GB Mobile has 1024 Shader Processing Units and the GeForce GTX 660M has 384. However, the actual shader performance of the RX 560X is 1306 and the actual shader performance of the GeForce GTX 660M is 365. The RX 560X having 941 better shader performance and an altogether better performance when taking into account other relevant data means that the RX 560X delivers a massively smoother and more efficient experience when processing graphical data than the GeForce GTX 660M.

The RX 560X transistor size technology is 14 nm (nanometers) smaller than the GeForce GTX 660M. This means that the RX 560X is expected to run slightly cooler and achieve higher clock frequencies than the GeForce GTX 660M.

The Radeon RX 560X 4GB Mobile requires 80 Watts to run and the GeForce GTX 660M requires 50 Watts. We would recommend a PSU with at least 450 Watts for the RX 560X. The RX 560X requires 30 Watts more than the GeForce GTX 660M to run. The difference is not significant enough for the RX 560X to have a noticeably larger impact on your yearly electricity bills than the GeForce GTX 660M.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1175 MHzvs835 MHz
Boost Clock1275 MHzvs950 MHz
ArchitectureGCN 1.3 Baffin XTKepler GK107-N13E-GE-A2
OC Potential - vs Poor
Driver Support Great vs Good
Release Date13 Apr 2018vs22 Mar 2012
GPU LinkGD LinkGD Link

Resolution Performance

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GPU Memory

Memory4096 MBvs2048 MB
Memory Speed1750 MHzvs1000 MHz
Memory Bus128 Bitvs128 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth112GB/secvs64GB/sec
L2 Cache 1024 KB green tick vs 256 KB
Delta Color Compression yes vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units1024vs384
Actual Shader Performance63%vs18%
Texture Mapping Units64vs32
Texture Rate75.2 GTexel/svs26.7 GTexel/s
Render Output Units16vs16
Pixel Rate18.8 GPixel/svs13.4 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)5120x2880vs4096x2160
VGA Connections0vs0
DVI Connections0vs0
HDMI Connections1vs0
DisplayPort Connections1vs-

GPU Power Requirements

Max Power80 Wattsvs50 Watts
Recommended PSU450 Watts-

GPU Features

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

GPU Supporting Hardware

Recommended Processor-Intel Core i5-3360M 2.8GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1600x900vs1600x900

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
\r\nThe new AMD Radeon RX 500X series are an OEM version of the current RX 500 series. Radeon RX 560X 4GB Mobile is an Middle-Class Graphics Card based on the 4th Generation of the Graphics Core Next (GCN) Architecture. The specs of the Radeon RX 500X series graphics cards are identical to the standard Radeon RX 500 series.

\r\nIt equips a GPU Codenamed Polaris 21 which has 16 Compute Units activated and thus 1024 Shader Processing Units, 64 TMUs and 16 ROPs.

\r\nThe GPU accesses a 4GB frame buffer of Fast GDDR5, through a 128-bit memory interface, while the Memory Clock Operates at 1750MHz, 7GHz effective.

\r\nPower Consumption
\r\nWith a rated board TDP of 80W, it requires at least a 450W PSU and relies entirely on the PCI Slot for Power, meaning no Extra Connectors are required.

\r\nThis graphics card was designed and marketed towards the competitive MOBO gamers. A light weight, small form factor GPU solution that offers mobility, so that gamers travelling to events can bring a smaller cheaper gaming rig. The Radeon RX 560X 4GB Mobile can play most modern games at medium graphics selection on a 1080p screen res and expect around 45+FPS. Performance is exactly the same as the Radeon RX 560.

\r\nSystem Suggestions
\r\nRadeon RX 560X 4GB Mobile is best suited for resolutions up to and including 1920x1080. We recommend a Performance Processor and 8GB of RAM for Optimal Performance.
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.
Recommended CPU
Possible GPU Upgrades
GPU Variants