Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTX 660M GeForce GT 520MX
Red Dead Redemption 2 435% 1761%
Doom Eternal 360% 1500%
Cyberpunk 2077 635% 2457%
Call of Duty: Modern Warfare 435% 1761%
Dragon Ball Z Kakarot 230% 1048%
Microsoft Flight Simulator 635% 2457%
Star Wars: Jedi - Fallen Order 635% 2457%
Grand Theft Auto VI 718% 2743%
Need For Speed Heat 435% 1761%
Warcraft 3: Reforged 79% 28%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 660M are massively better than the Nvidia GeForce GT 520MX.

The GeForce GT 520MX has a 65 MHz higher core clock speed than the GeForce GTX 660M, but the GeForce GTX 660M has 24 more Texture Mapping Units than the GeForce GT 520MX. As a result, the GeForce GTX 660M exhibits a 19.5 GTexel/s better Texture Fill Rate than the GeForce GT 520MX. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GeForce GT 520MX has a 65 MHz higher core clock speed than the GeForce GTX 660M, but the GeForce GTX 660M has 12 more Render Output Units than the GeForce GT 520MX. As a result, the GeForce GTX 660M exhibits a 9.8 GPixel/s better Pixel Fill Rate than the GeForce GT 520MX. 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 less than a year after the GeForce GT 520MX, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The GeForce GTX 660M has 1024 MB more video memory than the GeForce GT 520MX, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GeForce GTX 660M also has superior memory performance overall.

The GeForce GTX 660M has 49.6 GB/sec greater memory bandwidth than the GeForce GT 520MX, which means that the memory performance of the GeForce GTX 660M is noticeably better than the GeForce GT 520MX.

The GeForce GTX 660M has 384 Shader Processing Units and the GeForce GT 520MX has 48. However, the actual shader performance of the GeForce GTX 660M is 365 and the actual shader performance of the GeForce GT 520MX is 86. The GeForce GTX 660M having 279 better shader performance and an altogether better performance when taking into account other relevant data means that the GeForce GTX 660M delivers a significantly smoother and more efficient experience when processing graphical data than the GeForce GT 520MX.

The GeForce GTX 660M transistor size technology is 12 nm (nanometers) smaller than the GeForce GT 520MX. This means that the GeForce GTX 660M is expected to run slightly cooler and achieve higher clock frequencies than the GeForce GT 520MX.

The GeForce GTX 660M requires 50 Watts to run and the GeForce GT 520MX requires 20 Watts. The GeForce GTX 660M requires 30 Watts more than the GeForce GT 520MX 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 GeForce GT 520MX.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed835 MHzvs900 MHz
Boost Clock950 MHzvs-
ArchitectureKepler GK107-N13E-GE-A2Fermi GF119
OC Potential Poor vs Poor
Driver Support Good vs Poor
Release Date22 Mar 2012vs30 May 2011
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
7.9
green tick vs
4.2
1600x900
5.9
green tick vs
2.9
1920x1080
4.4
green tick vs
2
2560x1440
2.8
green tick vs
1.4
3840x2160
1.8
green tick vs -

GPU Memory

Memory2048 MBvs1024 MB
Memory Speed1000 MHzvs900 MHz
Memory Bus128 Bitvs64 Bit
Memory TypeGDDR5vsDDR3
Memory Bandwidth64GB/secvs14.4GB/sec
L2 Cache 256 KB green tick vs 128 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units384vs48
Actual Shader Performance18%vs4%
Technology28nmvs40nm
Texture Mapping Units32vs8
Texture Rate26.7 GTexel/svs7.2 GTexel/s
Render Output Units16vs4
Pixel Rate13.4 GPixel/svs3.6 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs2560x1600
VGA Connections0vs0
DVI Connections0vs1
HDMI Connections0vs0
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power50 Wattsvs20 Watts
Recommended PSU--

GPU Features

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

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-3360M 2.8GHzvsIntel Core i3-2310M 2.1GHz
Recommended RAM8 GBvs4 GB
Maximum Recommended Gaming Resolution1600x900vs1024x768

Gaming Performance Value

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.

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.
Overview
GeForce GT 520MX is a entry-level Mobile Graphics Card based on the second revision of the Fermi Architecture.

Architecture
The Fermi Architecture is manufactured with a 40nm technology and uses a technique known as Hot Clocking: The Shaders are clocked twice as fast as the Central Unit. While this leads to a reasonable performance boost, it causes enormous amounts of energy dissipation, leading, ultimately, to a significantly higher operating temperature.
Fermi is also the first GPU architecture with fully cached memory access which increases memory performance.

GPU
It equips a GPU Codenamed GF119 which has 1 Stream Multiprocessors activated and thus offers 48 Shader Processing Units, 8 TMUs and 4 ROPs. The Central Unit is clocked at 900MHz.

Memory
The GPU accesses a 1GB frame buffer of DDR3, through a 64-bit memory interface. The size of the frame buffer is exaggerated and no way benefits the GPU. The Memory Clock Operates at 900MHz.

Features
DirectX 11.0 Support (11.0 Hardware Default) and support for Optimus, 3D Vision Surround, PhysX, Realtime Raytracing and other technologies

Power Consumption
With a rated board TDP of 20W, it is suited for small laptops.

Performance
Gaming benchmarks put its performance slightly above a desktop GeForce GT 420.

System Suggestions
We recommend a modest processor (Intel Core i3 Mobile) and 4GB of RAM for a system with GeForce GT 520MX.
Recommended CPU
Possible GPU Upgrades
N/A
N/A
GPU Variants
-
-

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