Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTX 660M GeForce GT 520M
Red Dead Redemption 2 435% 2040%
Doom Eternal 360% 1740%
Cyberpunk 2077 635% 2840%
Call of Duty: Modern Warfare 435% 2040%
Dragon Ball Z Kakarot 230% 1220%
Microsoft Flight Simulator 635% 2840%
Star Wars: Jedi - Fallen Order 635% 2840%
Grand Theft Auto VI 718% 3170%
Need For Speed Heat 435% 2040%
Warcraft 3: Reforged 79% 18%

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

The GeForce GTX 660M has a 95 MHz higher core clock speed and 24 more Texture Mapping Units than the GeForce GT 520M. This results in the GeForce GTX 660M providing 20.8 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 GeForce GTX 660M has a 95 MHz higher core clock speed and 12 more Render Output Units than the GeForce GT 520M. This results in the GeForce GTX 660M providing 10.4 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 GeForce GTX 660M was released over a year more recently than the GeForce GT 520M, and so the GeForce GTX 660M is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GeForce GT 520M.

The GeForce GTX 660M has 1024 MB more video memory than the GeForce GT 520M, 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 51.2 GB/sec greater memory bandwidth than the GeForce GT 520M, which means that the memory performance of the GeForce GTX 660M is much better than the GeForce GT 520M.

The GeForce GTX 660M has 384 Shader Processing Units and the GeForce GT 520M has 48. However, the actual shader performance of the GeForce GTX 660M is 365 and the actual shader performance of the GeForce GT 520M is 71. The GeForce GTX 660M having 294 better shader performance and an altogether better performance when taking into account other relevant data means that the GeForce GTX 660M delivers a massively smoother and more efficient experience when processing graphical data than the GeForce GT 520M.

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

The GeForce GTX 660M requires 50 Watts to run and the GeForce GT 520M requires 12 Watts. The GeForce GTX 660M requires 38 Watts more than the GeForce GT 520M to run. The difference is significant enough that the GeForce GTX 660M may have a slight adverse affect on your yearly electricity bills in comparison to the GeForce GT 520M.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed835 MHzvs740 MHz
Boost Clock950 MHzvs-
ArchitectureKepler GK107-N13E-GE-A2Fermi GF119
OC Potential Poor vs Poor
Driver Support Good vs Poor
Release Date22 Mar 2012vs05 Jan 2011
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
7.9
green tick vs
4.1
1600x900
5.9
green tick vs
2.7
1920x1080
4.4
green tick vs
1.8
2560x1440
2.8
green tick vs
1.3
3840x2160
1.8
green tick vs -

GPU Memory

Memory2048 MBvs1024 MB
Memory Speed1000 MHzvs800 MHz
Memory Bus128 Bitvs64 Bit
Memory TypeGDDR5vsDDR3
Memory Bandwidth64GB/secvs12.8GB/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%vs3%
Technology28nmvs40nm
Texture Mapping Units32vs8
Texture Rate26.7 GTexel/svs5.9 GTexel/s
Render Output Units16vs4
Pixel Rate13.4 GPixel/svs3 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 Wattsvs12 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 GBvs3 GB
Maximum Recommended Gaming Resolution1600x900vs1024x768

Gaming Performance Value

Battlefield 3vs
Minecraftvs
Crysis 3vs
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 520M 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 740MHz.

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 800MHz.

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 12W, it is suited for very small laptops.

Performance
Gaming benchmarks put its performance somewhat below 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 520M.
Recommended CPU
Possible GPU Upgrades
N/A
N/A
GPU Variants
-
-

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