Select any two GPUs for comparison

Gaming Performance Comparison

Recommended System Requirements
Game Radeon R9 M275X GeForce 840M 2GB
Cyberpunk 2077 331% 559%
Watch Dogs Legion 319% 541%
Assassins Creed: Valhalla 298% 508%
Call of Duty: Black Ops Cold War 285% 488%
FIFA 21 119% 235%
Genshin Impact 335% 565%
Microsoft Flight Simulator 285% 488%
eFootball PES 2021 119% 235%
Ghostrunner 285% 488%
Horizon: Zero Dawn 312% 529%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon R9 M275X are significantly better than the Nvidia GeForce 840M 2GB.

The GeForce 840M 2GB has a 129 MHz higher core clock speed than the Radeon R9 M275X, but the Radeon R9 M275X has 16 more Texture Mapping Units than the GeForce 840M 2GB. As a result, the Radeon R9 M275X exhibits a 11.3 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 129 MHz higher core clock speed than the Radeon R9 M275X, but the Radeon R9 M275X has 8 more Render Output Units than the GeForce 840M 2GB. As a result, the Radeon R9 M275X exhibits a 6.2 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 less than a year after the Radeon R9 M275X, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The Radeon R9 M275X and the GeForce 840M 2GB have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The Radeon R9 M275X has 48 GB/sec greater memory bandwidth than the GeForce 840M 2GB, which means that the memory performance of the Radeon R9 M275X is noticeably better than the GeForce 840M 2GB.

The Radeon R9 M275X has 640 Shader Processing Units and the GeForce 840M 2GB has 384. However, the actual shader performance of the Radeon R9 M275X is 592 and the actual shader performance of the GeForce 840M 2GB is 583. The Radeon R9 M275X having 9 better shader performance and an altogether better performance when taking into account other relevant data means that the Radeon R9 M275X delivers a significantly smoother and more efficient experience when processing graphical data than the GeForce 840M 2GB.

The Radeon R9 M275X requires 50 Watts to run and the GeForce 840M 2GB requires 33 Watts. The Radeon R9 M275X requires 17 Watts more than the GeForce 840M 2GB to run. The difference is not significant enough for the Radeon R9 M275X to have a noticeably larger impact on your yearly electricity bills than the GeForce 840M 2GB.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed900 MHzvs1029 MHz
Boost Clock925 MHzvs1124 MHz
ArchitectureGCN 1.1 Venus XTXMaxwell GM108
OC Potential Poor vs Poor
Driver Support - vs Great
Release Date09 Mar 2014vs12 Mar 2014
GPU LinkGD LinkGD Link

Resolution Performance

green tick vs
green tick vs
green tick vs
green tick vs
green tick vs

GPU Memory

Memory2048 MBvs2048 MB
Memory Speed1000 MHzvs1001 MHz
Memory Bus128 Bitvs64 Bit
Memory TypeGDDR5vsDDR3
Memory Bandwidth64GB/secvs16GB/sec
L2 Cache 256 KB vs green tick 1024 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units640vs384
Actual Shader Performance28%vs28%
Texture Mapping Units40vs24
Texture Rate36 GTexel/svs24.7 GTexel/s
Render Output Units16vs8
Pixel Rate14.4 GPixel/svs8.2 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs0
DVI Connections0vs0
HDMI Connections0vs0
DisplayPort Connections-vs-

GPU Power Requirements

Max Power50 Wattsvs33 Watts
Recommended PSU--

GPU Features

Shader Model5.0vs5.0
Open GL4.3vs4.5
Open CL-vs-
Notebook GPUyesyes

GPU Supporting Hardware

Recommended ProcessorIntel Core i7-4600M 2-Core 2.9GHzvsIntel Core i3-4100M 2.5GHz
Recommended RAM8 GBvs4 GB
Maximum Recommended Gaming Resolution1920x1080vs1366x768

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewRadeon R9 M275X is a fast-middle-class-level graphics card based on the second revision of the Graphics Core Next architecture.
It offers a core codenamed Venus XTX that packs 640 Shader Processing Units, 40 TMUs and 16 ROPs, on a 128-bit memory interface of fast GDDR5. While the central unit runs at 900MHz and goes up to 925MHz, in Turbo Mode, the memory clock operates at 1000MHz. The regular version should offer 2GB of video memory but expect to see gimmicks of up to 4GB.
Its performance is practically identical to the old desktop Radeon HD 7770.
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.
Recommended CPU
Possible GPU Upgrades
GPU Variants