Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 Iris Graphics 5100 Desktop
Hitman 3 880% 1132%
Cyberpunk 2077 653% 847%
Assassins Creed: Valhalla 589% 766%
Resident Evil 8 653% 847%
FIFA 21 280% 378%
Grand Theft Auto VI 960% 1233%
Call of Duty: Black Ops Cold War 567% 738%
Genshin Impact 653% 847%
Far Cry 6 990% 1270%
The Medium 840% 1082%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GT 640 are noticeably better than the Intel Iris Graphics 5100 Desktop.

The GeForce GT 640 has a 502 MHz higher core clock speed and 24 more Texture Mapping Units than the Graphics 5100. This results in the GeForce GT 640 providing 25.7 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 GT 640 has a 502 MHz higher core clock speed and 12 more Render Output Units than the Graphics 5100. This results in the GeForce GT 640 providing 12.8 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 Graphics 5100 was released less than a year after the GeForce GT 640, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The GeForce GT 640 has 2048 MB video memory, but the Graphics 5100 does not have an entry, so the two GPUs cannot be reliably compared in this area.

The GeForce GT 640 has 384 Shader Processing Units and the Iris Graphics 5100 Desktop has 160. However, the actual shader performance of the GeForce GT 640 is 346 and the actual shader performance of the Graphics 5100 is 314. The GeForce GT 640 having 32 better shader performance and an altogether better performance when taking into account other relevant data means that the GeForce GT 640 delivers a noticeably smoother and more efficient experience when processing graphical data than the Graphics 5100.

The Graphics 5100 transistor size technology is 6 nm (nanometers) smaller than the GeForce GT 640. This means that the Graphics 5100 is expected to run very slightly cooler and achieve higher clock frequencies than the GeForce GT 640.

The GeForce GT 640 requires 65 Watts to run and the Iris Graphics 5100 Desktop requires 28 Watts. We would recommend a PSU with at least 350 Watts for the GeForce GT 640. The GeForce GT 640 requires 37 Watts more than the Graphics 5100 to run. The difference is significant enough that the GeForce GT 640 may have a slight adverse affect on your yearly electricity bills in comparison to the Graphics 5100.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed902 MHzvs400 MHz
Boost Clock-vs-
ArchitectureKepler GK107-300-A2Haswell: GT3
OC Potential Fair vs None
Driver Support Good vs -
Release Date05 Jun 2012vs29 Apr 2013
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
6.6
green tick vs -
1600x900
5.1
green tick vs -
1920x1080
3.5
green tick vs -
2560x1440
2.5
green tick vs -
3840x2160
1.7
green tick vs -

GPU Memory

Memory2048 MBvsN/A
Memory Speed891 MHzvs800 MHz
Memory Bus128 Bitvs128 Bit
Memory TypeDDR3vsDDR3
Memory Bandwidth28.5GB/secvs25.6GB/sec
L2 Cache 256 KB green tick vs -
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units384vs160
Actual Shader Performance17%vs15%
Technology28nmvs22nm
Texture Mapping Units32vs8
Texture Rate28.9 GTexel/svs3.2 GTexel/s
Render Output Units16vs4
Pixel Rate14.4 GPixel/svs1.6 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs2560x1600
VGA Connections1vs0
DVI Connections1vs0
HDMI Connections1vs0
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power65 Wattsvs28 Watts
Recommended PSU350 Watts & 26 Amps-

GPU Features

DirectX12.0vs11.1
Shader Model5.0vs5.0
Open GL4.5vs4.0
Open CL-vs-
Notebook GPUnono
SLI/Crossfirenovsno
Dedicatedyesvsno
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3220 3.3GHz-
Recommended RAM8 GB-
Maximum Recommended Gaming Resolution1366x768vs1366x768

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GT 640 is a Middle-Class Graphics Card based on the first revision of the Kepler Architecture.

Architecture
The Kepler Architecture was NVIDIA's big step to power efficiency. Each Stream Multiprocessor (SMX) now hosts 192 Shader Processing Units - against the 48 of older Fermi Architecture, and has been redesigned being now clocked at the same speed of the Central Unit. This means they are more energy efficient and will consequently lead to cooler operating temperatures. However, it also means they are weaker. It can be said that one Fermi SMX is as fast as 2 Kepler SMXs.
Additionally, and not available in all GPUs, Kepler also introduced the Boost Clock Feature. The Boost Clock is an even higher Clock Speed activated when in gaming mode and becomes the effective speed of the GPU.

GPU
It equips a GPU Codenamed GK107-300-A2 which has 2 Stream Multiprocessor activated and thus offers 384 Shader Processing Units, 32 TMUs and 16 ROPs. The Central Unit is clocked at 902MHz.

Memory
The GPU accesses a 2GB frame buffer of DDR3, through a 128-bit memory interface. The size of the frame buffer is exaggerated and in no way benefits the GPU. The Memory Clock Operates at 891MHz.

Features
DirectX 11.0 Support (11.0 Hardware Default) and support for Optimus, CUDA, OpenCL, DirectCompute, 3D Vision Surround, PhysX, Realtime Raytracing and other technologies

Power Consumption
With a rated board TDP of 65W, it requires at least a 350W PSU and it relies entirely on the PCI Slot for power, meaning no extra connectors are required.

Performance
Gaming benchmarks put its performance on average with Radeon HD 6670.

System Suggestions
We recommend a Modest Processor (Intel Core i3) and 8GB of RAM for a system with GeForce GT 640.
Iris Graphics 5100 Desktop are found in some of the 2013 Haswell desktop processors.
They feature 40 Execution Units (160 Shader Processing Units), 8 TMUs and 4 ROPs. They share system memory and so the memory channel and speed will depend on the users configuration. The best possible combination is a dual-channel bus-width with an operating memory clock of 800MHz.
Its central unit and turbo frequency also depend on the CPU its embedded but it ranges from 400MHz to 1350MHz.
Its performance is average and only somewhat better than what dedicated GeForce GT 630 & Radeon 6570 offer.
Recommended CPU
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Possible GPU Upgrades
-
GPU Variants
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