Select any two GPUs for comparison
VS

Gaming Performance Comparison

Recommended System Requirements
Game Radeon RX 540X 2GB Mobile GeForce GTX 660M
Cyberpunk 2077 102% 460%
Assassins Creed: Valhalla 86% 417%
Call of Duty: Black Ops Cold War 107% 475%
Genshin Impact 104% 465%
eFootball PES 2021 3% 185%
Marvel's Avengers 93% 435%
Watch Dogs Legion 96% 445%
FIFA 21 3% 185%
Mafia: Definitive Edition 192% 710%
Microsoft Flight Simulator 80% 400%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon RX 540X 2GB Mobile are massively better than the Nvidia GeForce GTX 660M.

The RX 540X has a 289 MHz higher core clock speed and the same number of Texture Mapping Units as the GeForce GTX 660M. This results in the RX 540X providing 9.3 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 RX 540X has a 289 MHz higher core clock speed than the GeForce GTX 660M and the same number of Render Output Units. This results in the RX 540X providing 4.6 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 540X was released over three years more recently than the GeForce GTX 660M, and so the RX 540X 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 Radeon RX 540X 2GB Mobile 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 GeForce GTX 660M has 64 GB/sec greater memory bandwidth than the RX 540X, which means that the memory performance of the GeForce GTX 660M is much better than the RX 540X.

The Radeon RX 540X 2GB Mobile has 512 Shader Processing Units and the GeForce GTX 660M has 384. However, the actual shader performance of the RX 540X is 624 and the actual shader performance of the GeForce GTX 660M is 365. The RX 540X having 259 better shader performance and an altogether better performance when taking into account other relevant data means that the RX 540X delivers a marginally smoother and more efficient experience when processing graphical data than the GeForce GTX 660M.

The RX 540X transistor size technology is 14 nm (nanometers) smaller than the GeForce GTX 660M. This means that the RX 540X is expected to run slightly cooler and achieve higher clock frequencies than the GeForce GTX 660M.

The Radeon RX 540X 2GB Mobile requires 50 Watts to run and the GeForce GTX 660M requires 50 Watts. We would recommend a PSU with at least 350 Watts for the RX 540X. The two GPUs require the same amount of wattage to run. As such, there is no need to worry about which will more significantly affect your yearly electricity bills.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1124 MHzvs835 MHz
Boost Clock1219 MHzvs950 MHz
ArchitectureGCN 1.3 Lexa ProKepler GK107-N13E-GE-A2
OC Potential - vs Poor
Driver Support - vs Good
Release Date13 Apr 2018vs22 Mar 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
10
green tick vs
7.9
1600x900
9.4
green tick vs
5.9
1920x1080
7.4
green tick vs
4.4
2560x1440
5.4
green tick vs
2.8
3840x2160
3.8
green tick vs
1.8

GPU Memory

Memory2048 MBvs2048 MB
Memory Speed1500 MHzvs1000 MHz
Memory Bus-vs128 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth-vs64GB/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 Units512vs384
Actual Shader Performance30%vs18%
Technology14nmvs28nm
Texture Mapping Units32vs32
Texture Rate36 GTexel/svs26.7 GTexel/s
Render Output Units16vs16
Pixel Rate18 GPixel/svs13.4 GPixel/s
Comparison

GPU Outputs

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

GPU Power Requirements

Max Power50 Wattsvs50 Watts
Recommended PSU350 Watts & 23 Amps-

GPU Features

DirectX12.0vs12.0
Shader Model-vs5.0
Open GL-vs4.5
Open CL-vs-
Notebook GPUyesyes
SLI/Crossfirenovsyes
Dedicatedyesvsyes
Comparison

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
The new AMD Radeon RX 500X series are an OEM version of the current RX 500 series. The Radeon RX 540X 2GB Mobile is a Low to Middle-Class laptop 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.

GPU
It equips a GPU Codenamed Lexa Pro which has 14 Compute Units activated and thus 512 Shader Processing Units, 32 TMUs and 16 ROPs.

Memory
The GPU accesses a 2GB frame buffer of Fast GDDR5, through a 128-bit memory interface, while the Memory Clock Operates at 1500MHz.

Power Consumption
With a rated board TDP of 50W, it requires at least a 350W PSU and relies entirely on the PCI Slot for Power, meaning no Extra Connectors are required.

Performance
This graphics card was designed and marketed towards the competitive MOBA gamers with laptops. A light weight, small form factor GPU solution that offers mobility. The Radeon RX 54X0 4GB Mobile can play most modern games at medium graphics selection on a 900p screen res and expect around 45+FPS. Performance is exactly the same as the Radeon RX 540.

System Suggestions
Radeon RX 540 2GB is best suited for resolutions up to and including 1600x900. We recommend a Performance Processor and 8GB of RAM for Optimal Performance.
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
-
-