Select any two GPUs for comparison

Gaming Performance Comparison

Recommended System Requirements
Game 655 GT3e GeForce 840M 2GB
Cyberpunk 2077 339% 559%
Assassins Creed: Valhalla 305% 508%
Call of Duty: Black Ops Cold War 351% 576%
Mafia: Definitive Edition 535% 853%
Genshin Impact 343% 565%
eFootball PES 2021 124% 235%
FIFA 21 124% 235%
Watch Dogs Legion 327% 541%
Death Stranding 343% 565%
Microsoft Flight Simulator 292% 488%

In terms of overall gaming performance, the graphical capabilities of the Intel 655 GT3e are significantly better than the Nvidia GeForce 840M 2GB.

The GeForce 840M 2GB has a 729 MHz higher core clock speed but 24 fewer Texture Mapping Units than the 655 GT3e. The lower TMU count doesn't matter, though, as altogether the GeForce 840M 2GB manages to provide 10.3 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 840M 2GB has a 729 MHz higher core clock speed and 5 more Render Output Units than the 655 GT3e. This results in the GeForce 840M 2GB providing 7.3 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 655 GT3e was released over three years more recently than the GeForce 840M 2GB, and so the 655 GT3e is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the GeForce 840M 2GB when running the latest games.

The GeForce 840M 2GB has 2048 MB video memory, but the 655 GT3e does not have an entry, so the two GPUs cannot be reliably compared in this area.

Both the 655 GT3e and the GeForce 840M 2GB have 384 Shader Processing Units. While the two GPUs have the same number of SPUs, the actual performance delivered by the GeForce 840M 2GB is 583 and by the 655 GT3e is 583. Knowing that the shader performance of the GeForce 840M 2GB is superior, it is not necessary to examine the GPUs' respective Texture and Pixel Fill Rates.

The 655 GT3e transistor size technology is 14 nm (nanometers) smaller than the GeForce 840M 2GB. This means that the 655 GT3e is expected to run slightly cooler and achieve higher clock frequencies than the GeForce 840M 2GB.

The 655 GT3e requires 28 Watts to run and the GeForce 840M 2GB requires 33 Watts. The GeForce 840M 2GB requires 5 Watts more than the 655 GT3e to run. The difference is not significant enough for the GeForce 840M 2GB to have a noticeably larger impact on your yearly electricity bills than the 655 GT3e.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed300 MHzvs1029 MHz
Boost Clock1200 MHzvs1124 MHz
ArchitectureKaby LakeMaxwell GM108
OC Potential - vs Poor
Driver Support - vs Great
Release Date01 Jun 2019vs12 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

MemoryN/Avs2048 MB
Memory Speed-vs1001 MHz
Memory Bus-vs64 Bit
Memory Type-vsDDR3
Memory Bandwidth-vs16GB/sec
L2 Cache 0 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 Units384vs384
Actual Shader Performance22%vs28%
Texture Mapping Units48vs24
Texture Rate14.4 GTexel/svs24.7 GTexel/s
Render Output Units3vs8
Pixel Rate0.9 GPixel/svs8.2 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)-vs4096x2160
VGA Connections0vs0
DVI Connections0vs0
HDMI Connections0vs0
DisplayPort Connections0vs-

GPU Power Requirements

Max Power28 Wattsvs33 Watts
Recommended PSU--

GPU Features

Shader Model6.4vs5.0
Open GL4.6vs4.5
Open CL-vs-
Notebook GPUyesyes

GPU Supporting Hardware

Recommended Processor-Intel Core i3-4100M 2.5GHz
Recommended RAM8 GBvs4 GB
Maximum Recommended Gaming Resolution1366x768vs1366x768

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
Intel Iris Plus Graphics 655 GT3e are integrated graphics in some of Intel's Kaby Lake mobile processors. It can be found in Intel i7-8559U, i5-8269U, i5-8259U, i3-8109U

The Kaby Lake architecture succeeds the Skylake architecture and aims for increased CPU and graphics performance, via the same power requirements. It includes support for DirectX 12.1, OpenCL 2.1 and OpenGL 4.6.
The central unit initially runs at 300MHz and goes up to 1200MHz, in turbo mode in the Intel i7-8559U.

Because Performance depends heavily on the Memory Bandwidth, it may vary heavily from System to System.
Best case scenario, expect performance similar to the AMD Radeon RX Vega 5.
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