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Gaming Performance Comparison

Recommended System Requirements
Game GeForce 840M 2GB GeForce GTX 260M SLI
Cyberpunk 2077 559% 598%
Watch Dogs Legion 541% 579%
Assassins Creed: Valhalla 508% 544%
Call of Duty: Black Ops Cold War 488% 523%
FIFA 21 235% 255%
Genshin Impact 565% 604%
Microsoft Flight Simulator 488% 523%
eFootball PES 2021 235% 255%
Ghostrunner 488% 523%
Horizon: Zero Dawn 529% 567%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce 840M 2GB are very slightly better than the Nvidia GeForce GTX 260M SLI.

The GeForce 840M 2GB has a 479 MHz higher core clock speed than the GTX 260M, but the GTX 260M has 88 more Texture Mapping Units than the GeForce 840M 2GB. As a result, the GTX 260M exhibits a 36.9 GTexel/s better Texture Fill Rate than the GeForce 840M 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 840M 2GB has a 479 MHz higher core clock speed than the GTX 260M, but the GTX 260M has 24 more Render Output Units than the GeForce 840M 2GB. As a result, the GTX 260M exhibits a 9.4 GPixel/s better Pixel Fill Rate than the GeForce 840M 2GB. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GeForce 840M 2GB was released over three years more recently than the GTX 260M, and so the GeForce 840M 2GB is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the GTX 260M when running the latest games.

The GeForce 840M 2GB and the GeForce GTX 260M SLI have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The GTX 260M has 105.6 GB/sec greater memory bandwidth than the GeForce 840M 2GB, which means that the memory performance of the GTX 260M is massively better than the GeForce 840M 2GB.

The GeForce 840M 2GB has 384 Shader Processing Units and the GeForce GTX 260M SLI has 224. However, the actual shader performance of the GeForce 840M 2GB is 583 and the actual shader performance of the GTX 260M is 123. The GeForce 840M 2GB having 460 better shader performance is not particularly notable, as altogether the GTX 260M performs better when taking into account other relevant data.

The GeForce 840M 2GB transistor size technology is 27 nm (nanometers) smaller than the GTX 260M. This means that the GeForce 840M 2GB is expected to run slightly cooler and achieve higher clock frequencies than the GTX 260M. While they exhibit similar graphical performance, the GeForce 840M 2GB should consume less power than the GTX 260M.

The GeForce 840M 2GB requires 33 Watts to run and the GeForce GTX 260M SLI requires 130 Watts. The GTX 260M requires 97 Watts more than the GeForce 840M 2GB to run. The difference is significant enough that the GTX 260M may have an adverse affect on your yearly electricity bills in comparison to the GeForce 840M 2GB.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1029 MHzvs550 MHz
Boost Clock1124 MHzvs-
ArchitectureMaxwell GM108Tesla G92b (x2)
OC Potential Poor vs None
Driver Support Great vs -
Release Date12 Mar 2014vs01 Mar 2009
GPU LinkGD LinkGD Link

Resolution Performance

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GPU Memory

Memory2048 MBvs2048 MB
Memory Speed1001 MHzvs950 MHz
Memory Bus64 Bitvs512 Bit
Memory TypeDDR3vsGDDR3
Memory Bandwidth16GB/secvs121.6GB/sec
L2 Cache 1024 KB green tick vs 0 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units384vs224
Actual Shader Performance28%vs6%
Texture Mapping Units24vs112
Texture Rate24.7 GTexel/svs61.6 GTexel/s
Render Output Units8vs32
Pixel Rate8.2 GPixel/svs17.6 GPixel/s

GPU Outputs

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

GPU Power Requirements

Max Power33 Wattsvs130 Watts
Recommended PSU--

GPU Features

Shader Model5.0vs4.0
Open GL4.5vs2.1
Open CL-vs-
Notebook GPUyesyes

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-4100M 2.5GHz-
Recommended RAM4 GBvs8 GB
Maximum Recommended Gaming Resolution1366x768vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce 840M 2GB is a Middle-Class Mobile Graphics Card based on the First Revision of the Maxwell architecture.

The Maxwell architecture features many improvements and among them is the extremely large L2 Cache which allows NVIDIA to produce Graphics Cards with relatively small memory data transfer rates, without causing too much impact on the overall performance. Furthermore, the Shaders have been redesigned and are both more powerful and energy efficient.

It equips a GPU codenamed GM108 which has 3 SM activated and thus offers 384 Shader Processing Units, 24 TMUs and 8 ROPs. The central unit runs at 1029MHz and goes up to 1124MHz, in Turbo Mode.

The GPU accesses a 2GB frame buffer of DDR3, through a 64-bit memory interface. The Frame Buffer is exaggerated and in no way benefits the GPU. The memory clock operates at 1001MHz.

DirectX 11.2 Support (11.0 Hardware Default) and support for GPU Boost 2.0, GeForce Experience, PhysX and other technologies.

Power Consumption
With a rated board TDP of 33W, it will only be equipped in average sized notebooks.

Benchmarks indicate its performance is over 20% faster than the older GeForce GT 740M. Therefore, it should match GeForce GT 750M.

System Suggestions
We recommend a modest processor (Intel Core i5 Mobile) and 4GB of RAM for a notebook with GeForce 840M 2GB.
GeForce GTX 260M SLI is a solution of two GeForce GTX 260M put together using NVIDIA'S SLI technology.
Check the page of GeForce GTX 260M 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, up to X% better than a single GeForce GTX 260M 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 260M.
Most demanding games will run at high settings with very fluent frame rates (45+).
Recommended CPU
Possible GPU Upgrades
GPU Variants