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Gaming Performance Comparison

Recommended System Requirements
Game Iris i5 5675C GeForce GT 640 v3 Zotac 2GB Edition
Red Dead Redemption 2 452% 529%
Halo: Reach 75% 100%
Cyberpunk 2077 658% 765%
Call of Duty: Modern Warfare 452% 529%
Doom Eternal 374% 441%
Microsoft Flight Simulator 658% 765%
Grand Theft Auto VI 743% 862%
Dragon Ball Z Kakarot 240% 288%
Star Wars: Jedi - Fallen Order 658% 765%
Need For Speed Heat 452% 529%

In terms of overall gaming performance, the graphical capabilities of the Intel Iris i5 5675C are very slightly better than the Nvidia GeForce GT 640 v3 Zotac 2GB Edition.

The GT 640 has a 746 MHz higher core clock speed and 8 more Texture Mapping Units than the Iris i5 5675C. This results in the GT 640 providing 14.3 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 GT 640 has a 746 MHz higher core clock speed and 6 more Render Output Units than the Iris i5 5675C. This results in the GT 640 providing 7.8 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 Iris i5 5675C was released over a year more recently than the GT 640, and so the Iris i5 5675C is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GT 640.

The GT 640 has 1920 MB more video memory than the Iris i5 5675C, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GT 640 also has superior memory performance overall.

The GT 640 has 27.3 GB/sec greater memory bandwidth than the Iris i5 5675C, which means that the memory performance of the GT 640 is slightly better than the Iris i5 5675C.

The Iris i5 5675C has 48 Shader Processing Units and the GeForce GT 640 v3 Zotac 2GB Edition has 384. However, the actual shader performance of the Iris i5 5675C is 53 and the actual shader performance of the GT 640 is 402. The GT 640 having 349 better shader performance and an altogether better performance when taking into account other relevant data means that the GT 640 delivers a noticeably smoother and more efficient experience when processing graphical data than the Iris i5 5675C.

The Iris i5 5675C transistor size technology is 14 nm (nanometers) smaller than the GT 640. This means that the Iris i5 5675C is expected to run slightly cooler and achieve higher clock frequencies than the GT 640.

The Iris i5 5675C requires 65 Watts to run and the GeForce GT 640 v3 Zotac 2GB Edition requires 49 Watts. We would recommend a PSU with at least 300 Watts for the Iris i5 5675C and a PSU with at least 350 Watts for the GT 640. The Iris i5 5675C requires 16 Watts more than the GT 640 to run. The difference is not significant enough for the Iris i5 5675C to have a noticeably larger impact on your yearly electricity bills than the GT 640.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed300 MHzvs1046 MHz
Boost Clock1100 MHzvs-
ArchitectureBroadwell GT3eKepler GK208-400-A1
OC Potential None vs Poor
Driver Support - vs Good
Release Date02 Jun 2015vs29 May 2013
GPU LinkGD LinkGD Link

Resolution Performance

green tick vs -
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GPU Memory

MemoryN/Avs2048 MB
Memory Speed800 MHzvs1252 MHz
Memory Bus128 Bitvs64 Bit
Memory TypeeDRAMvsGDDR5
Memory Bandwidth12.8GB/secvs40.1GB/sec
L2 Cache 512 KB green tick vs 128 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units48vs384
Actual Shader Performance3%vs19%
Texture Mapping Units8vs16
Texture Rate2.4 GTexel/svs16.7 GTexel/s
Render Output Units2vs8
Pixel Rate0.6 GPixel/svs8.4 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs4096x2160
VGA Connections0vs1
DVI Connections0vs1
HDMI Connections0vs1
DisplayPort Connections0vs-

GPU Power Requirements

Max Power65 Wattsvs49 Watts
Recommended PSU300 Watts & 20 Ampsvs350 Watts & 26 Amps

GPU Features

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

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-5675C 3.1GHzvsIntel Core i3-3220 3.3GHz
Recommended RAM4 GBvs8 GB
Maximum Recommended Gaming Resolution1366x768vs1366x768

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
Intel Iris i5 5675C is the Specific Version of Intel Iris Pro Graphics 6200 Desktop that is Integrated in the Core i5-5675C Processor.

The Central Unit Initially Runs at 300MHz and goes up to 1100MHz, in Turbo Mode.

Unlike the common Integrated Graphics Cards, this one has access to a dedicated frame buffer of 128MB of eDRAM.
The GPU also Shares the System's RAM which varies from laptop to laptop. Typically, the GPU reserves 1GB. Depending on whether or not the system's RAM is Dual-Channeled, it can access either a 64-bit or 128-bit memory interface. The operating memory clock also depends on the at which speed the System's RAM is running and is limited by the highest operating speed that the Processor supports. In this case, it is 800MHz.
It is then obvious the Memory Bandwidth depends on a lot of factors and thus this Graphics Card performance may vary heavily from system to system.

Benchmarks Indicate Performance around of a Dedicated GeForce 940M.

System Suggestions
We recommend 4GB of RAM for a system with Intel Iris HD i5 5675C.
GeForce GT 640 v3 Zotac 2GB Edition is a special edition of NVIDIA's Middle-Class GeForce GT 640 v3, created by Zotac.

Overclock: Central Unit
The Central Unit runs at the same speed.

Overclock: Memory Clock
The Operating Memory Clock and the Frame Buffer remain the same.

Cooling Solution
The Cooling System has been replaced by Zotac's Silent Cooling Solution.

Without Overclocking Out of The Box, GeForce GT 640 v3 Zotac 2GB Edition is as fast as the reference GeForce GT 640 v3.
Recommended CPU
Possible GPU Upgrades
GPU Variants