Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce 940MX 2GB GeForce GTX 580M SLI
Cyberpunk 2077 495% 109%
Assassins Creed: Valhalla 444% 91%
Call of Duty: Black Ops Cold War 426% 85%
Hitman 3 674% 172%
Grand Theft Auto VI 737% 194%
FIFA 21 200% 6%
Far Cry 6 761% 203%
Genshin Impact 495% 109%
World of Warcraft: Shadowlands 753% 200%
Watch Dogs Legion 474% 102%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 580M SLI are massively better than the Nvidia GeForce 940MX 2GB.

The GeForce 940MX 2GB has a 502 MHz higher core clock speed than the GTX 580M, but the GTX 580M has 104 more Texture Mapping Units than the GeForce 940MX 2GB. As a result, the GTX 580M exhibits a 52.5 GTexel/s better Texture Fill Rate than the GeForce 940MX 2GB. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.

The GeForce 940MX 2GB has a 502 MHz higher core clock speed than the GTX 580M, but the GTX 580M has 56 more Render Output Units than the GeForce 940MX 2GB. As a result, the GTX 580M exhibits a 30.7 GPixel/s better Pixel Fill Rate than the GeForce 940MX 2GB. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GeForce 940MX 2GB was released over three years more recently than the GTX 580M, and so the GeForce 940MX 2GB is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the GTX 580M when running the latest games.

The GTX 580M has 2048 MB more video memory than the GeForce 940MX 2GB, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GTX 580M also has superior memory performance overall.

The GTX 580M has 176 GB/sec greater memory bandwidth than the GeForce 940MX 2GB, which means that the memory performance of the GTX 580M is massively better than the GeForce 940MX 2GB.

The GeForce 940MX 2GB has 384 Shader Processing Units and the GeForce GTX 580M SLI has 768. However, the actual shader performance of the GeForce 940MX 2GB is 644 and the actual shader performance of the GTX 580M is 952. The GTX 580M having 308 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 580M delivers a massively smoother and more efficient experience when processing graphical data than the GeForce 940MX 2GB.

The GeForce 940MX 2GB transistor size technology is 12 nm (nanometers) smaller than the GTX 580M. This means that the GeForce 940MX 2GB is expected to run slightly cooler and achieve higher clock frequencies than the GTX 580M.

The GeForce 940MX 2GB requires 25 Watts to run and the GeForce GTX 580M SLI requires 200 Watts. The GTX 580M requires 175 Watts more than the GeForce 940MX 2GB to run. The difference is significant enough that the GTX 580M may have an adverse affect on your yearly electricity bills in comparison to the GeForce 940MX 2GB.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1122 MHzvs620 MHz
Boost Clock1242 MHzvs-
ArchitectureMaxwell GM108-N16S-GTRFermi GF114 (x2)
OC Potential Poor vs None
Driver Support Great vs -
Release Date01 Mar 2016vs01 Jun 2011
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
7.4
green tick vs -
1600x900
5.7
vs green tick
9.3
1920x1080
4.2
vs green tick
7.3
2560x1440
2.8
vs green tick
5.3
3840x2160
1.9
green tick vs -

GPU Memory

Memory2048 MBvs4096 MB
Memory Speed1001 MHzvs750 MHz
Memory Bus64 Bitvs512 Bit
Memory TypeDDR3vsGDDR5
Memory Bandwidth16GB/secvs192GB/sec
L2 Cache 2048 KB green tick vs 0 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units384vs768
Actual Shader Performance31%vs46%
Technology28nmvs40nm
Texture Mapping Units24vs128
Texture Rate26.9 GTexel/svs79.4 GTexel/s
Render Output Units8vs64
Pixel Rate9 GPixel/svs39.7 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs2560x1600
VGA Connections0vs0
DVI Connections0vs0
HDMI Connections0vs0
DisplayPort Connections0vs-
Comparison

GPU Power Requirements

Max Power25 Wattsvs200 Watts
Recommended PSU--

GPU Features

DirectX12.0vs11
Shader Model5.0vs5.0
Open GL4.5vs4.1
Open CL-vs-
Notebook GPUyesyes
SLI/Crossfirenovsyes
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-6300HQ 2.3GHzvsIntel Core i7-2820QM 4-Core 2.3GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1366x768vs1920x800

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce 940MX 2GB is a Middle-Class Mobile Graphics Card based on the Maxwell Architecture.

Architecture
GeForce 940MX 2GB Features a GPU Codenamed GM108-N16S-GTR which is a First Gen Maxwell GPU and is identical to the GM108-N16S-GT-S used on GeForce 940M but with the addition of GDDR5 Support.
GM108-N16S-GTR has 3 Compute Units Unlocked and thus offers 384 Shader Processing Units, 24 TMUs and 8 ROPs.

GPU
The Central Unit is Clocked at 1122Hz and goes up to 1242MHz, in Turbo Mode.

Memory: Speed
The GPU is equipped with DDR3 and Accesses the Frame Buffer through a 64-bit Memory Interface. The Memory Clock Operates at 1001MHz.

Memory: Frame Buffer
The GPU can fill up a Memory Pool of up to 2GB.

Power Consumption
With a rated board TDP of 25W, it is suited for small and medium sized laptops.

Performance
Equipped with DDR3, GeForce GT 940MX is only slightly faster than GeForce GT 940M.

System Suggestions
GeForce 940MX 2GB is best suited for resolutions up to and including 1366x768. We Recommend a Middle-Class Processor and 8GB of RAM for Optimal Performance.
GeForce GTX 580M SLI is a solution of two GeForce GTX 580M put together using NVIDIA'S SLI technology.
Check the page of GeForce GTX 580M to know more about its chip.
As usual, SLI relies a lot on proper driver support and may suffer from micro-stuttering in lower frame rates (below 30). Benchmarks indicate the performance is overall, about 35% better than a single GeForce GTX 580M performing by itself but at times (depending whether or not the 3D game supports SLI or in the graphics driver) it performed worse than a single GeForce GTX 580M.
Even the most demanding games will run at the highest settings.
Recommended CPU
Possible GPU Upgrades
N/A
N/A
GPU Variants
-
-