Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce 840M 2GB Radeon HD 6950M
Red Dead Redemption 2 529% 397%
Cyberpunk 2077 765% 583%
Dragon Ball Z Kakarot 288% 207%
Microsoft Flight Simulator 765% 583%
Call of Duty: Modern Warfare 529% 397%
Doom Eternal 441% 328%
FIFA 20 235% 165%
Grand Theft Auto VI 862% 660%
Need For Speed Heat 529% 397%
Halo: Reach 100% 58%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 6950M are noticeably better than the Nvidia GeForce 840M 2GB.

The GeForce 840M 2GB has a 449 MHz higher core clock speed than the Radeon HD 6950M, but the Radeon HD 6950M has 24 more Texture Mapping Units than the GeForce 840M 2GB. As a result, the Radeon HD 6950M exhibits a 3.1 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 449 MHz higher core clock speed than the Radeon HD 6950M, but the Radeon HD 6950M has 24 more Render Output Units than the GeForce 840M 2GB. As a result, the Radeon HD 6950M exhibits a 10.4 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 Radeon HD 6950M, 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 Radeon HD 6950M when running the latest games.

The GeForce 840M 2GB has 1024 MB more video memory than the Radeon HD 6950M, so is likely to be much better at displaying game textures at higher resolutions. However, overall, the Radeon HD 6950M has superior memory performance.

The Radeon HD 6950M has 99.2 GB/sec greater memory bandwidth than the GeForce 840M 2GB, which means that the memory performance of the Radeon HD 6950M is massively better than the GeForce 840M 2GB.

The GeForce 840M 2GB has 384 Shader Processing Units and the Radeon HD 6950M has 960. However, the actual shader performance of the GeForce 840M 2GB is 583 and the actual shader performance of the Radeon HD 6950M is 278. The GeForce 840M 2GB having 305 better shader performance is not particularly notable, as altogether the Radeon HD 6950M performs better when taking into account other relevant data.

The GeForce 840M 2GB transistor size technology is 12 nm (nanometers) smaller than the Radeon HD 6950M. This means that the GeForce 840M 2GB is expected to run slightly cooler and achieve higher clock frequencies than the Radeon HD 6950M.

The GeForce 840M 2GB requires 33 Watts to run and the Radeon HD 6950M requires 50 Watts. The Radeon HD 6950M requires 17 Watts more than the GeForce 840M 2GB to run. The difference is not significant enough for the Radeon HD 6950M to have a noticeably larger impact on your yearly electricity bills than the GeForce 840M 2GB.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1029 MHzvs580 MHz
Boost Clock1124 MHzvs-
ArchitectureMaxwell GM108Terascale 2 Blackcomb PRO
OC Potential Poor vs Good
Driver Support Great vs Poor
Release Date12 Mar 2014vs04 Jan 2011
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
7
green tick vs -
1600x900
5.4
green tick vs -
1920x1080
3.9
green tick vs -
2560x1440
2.6
green tick vs -
3840x2160
1.7
green tick vs -

GPU Memory

Memory2048 MBvs1024 MB
Memory Speed1001 MHzvs900 MHz
Memory Bus64 Bitvs256 Bit
Memory TypeDDR3vsGDDR5
Memory Bandwidth16GB/secvs115.2GB/sec
L2 Cache 1024 KB green tick vs 512 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units384vs960
Actual Shader Performance28%vs13%
Technology28nmvs40nm
Texture Mapping Units24vs48
Texture Rate24.7 GTexel/svs27.8 GTexel/s
Render Output Units8vs32
Pixel Rate8.2 GPixel/svs18.6 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs2560x1600
VGA Connections0vs1
DVI Connections0vs2
HDMI Connections0vs1
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power33 Wattsvs50 Watts
Recommended PSU--

GPU Features

DirectX12.0vs11.0
Shader Model5.0vs5.0
Open GL4.5vs4.3
Open CL-vs-
Notebook GPUyesyes
SLI/Crossfirenovsyes
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-4100M 2.5GHzvsIntel Core i7-2620M 2-Core 2.7GHz
Recommended RAM4 GBvs8 GB
Maximum Recommended Gaming Resolution1366x768vs1680x1050

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.

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.

GPU
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.

Memory
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.

Features
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.

Performance
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.
Radeon HD 6950M is a high-end GPU based on the 40nm Terrascale 2 architecture.
It's based on the Barts Core (therefore related to Radeon HD 6850) and offers 980 Shader Processing Units, 48 TMUs and 32 ROPs on a 256-bit memory interface of fast GDDR5. Its central clock runs at 580MHz and the memory clock operates at 900MHz.
Its performance is not exceptionally good due to being heavily underclocked.
Most of today's modern games are playable at the highest settings but some exceptions will require lower resolutions or modest presets to be played optimally.
Recommended CPU
Possible GPU Upgrades
N/A
N/A
GPU Variants
-
-

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