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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 GeForce 9600 GT Asus Magic HDMI 512MB Edition
Cyberpunk 2077 653% 707%
Assassins Creed: Valhalla 589% 638%
Call of Duty: Black Ops Cold War 567% 614%
FIFA 21 280% 307%
Grand Theft Auto VI 960% 1036%
Hitman 3 880% 950%
Genshin Impact 653% 707%
Far Cry 6 990% 1068%
World of Warcraft: Shadowlands 980% 1057%
Watch Dogs Legion 627% 679%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GT 640 are very slightly better than the Nvidia GeForce 9600 GT Asus Magic HDMI 512MB Edition.

The GeForce GT 640 has a 302 MHz higher core clock speed and the same number of Texture Mapping Units as the 9600 GT. This results in the GeForce GT 640 providing 9.7 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 302 MHz higher core clock speed than the 9600 GT and the same number of Render Output Units. This results in the GeForce GT 640 providing 4.8 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 GeForce GT 640 was released over three years more recently than the 9600 GT, and so the GeForce GT 640 is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the 9600 GT when running the latest games.

The GeForce GT 640 has 1536 MB more video memory than the 9600 GT, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GeForce GT 640 also has superior memory performance overall.

The GeForce GT 640 has 2.9 GB/sec greater memory bandwidth than the 9600 GT, which means that the memory performance of the GeForce GT 640 is marginally better than the 9600 GT.

The GeForce GT 640 has 384 Shader Processing Units and the GeForce 9600 GT Asus Magic HDMI 512MB Edition has 64. However, the actual shader performance of the GeForce GT 640 is 346 and the actual shader performance of the 9600 GT is 96. The GeForce GT 640 having 250 better shader performance and an altogether better performance when taking into account other relevant data means that the GeForce GT 640 delivers a marginally smoother and more efficient experience when processing graphical data than the 9600 GT.

The GeForce GT 640 transistor size technology is 37 nm (nanometers) smaller than the 9600 GT. This means that the GeForce GT 640 is expected to run much cooler and achieve higher clock frequencies than the 9600 GT. While they exhibit similar graphical performance, the GeForce GT 640 should consume less power than the 9600 GT.

The GeForce GT 640 requires 65 Watts to run and the GeForce 9600 GT Asus Magic HDMI 512MB Edition requires 50 Watts. We would recommend a PSU with at least 350 Watts for the GeForce GT 640 and a PSU with at least 350 Watts for the 9600 GT. The GeForce GT 640 requires 15 Watts more than the 9600 GT to run. The difference is not significant enough for the GeForce GT 640 to have a noticeably larger impact on your yearly electricity bills than the 9600 GT.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed902 MHzvs600 MHz
Boost Clock-vs-
ArchitectureKepler GK107-300-A2Tesla G94-300-A1
OC Potential Fair vs Good
Driver Support Good vs Poor
Release Date05 Jun 2012vs01 Feb 2008
GPU LinkGD LinkGD Link

Resolution Performance

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GPU Memory

Memory2048 MBvs512 MB
Memory Speed891 MHzvs400 MHz
Memory Bus128 Bitvs256 Bit
Memory TypeDDR3vsGDDR3
Memory Bandwidth28.5GB/secvs25.6GB/sec
L2 Cache 256 KB green tick vs 0 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units384vs64
Actual Shader Performance17%vs5%
Texture Mapping Units32vs32
Texture Rate28.9 GTexel/svs19.2 GTexel/s
Render Output Units16vs16
Pixel Rate14.4 GPixel/svs9.6 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs2560x1600
VGA Connections1vs1
DVI Connections1vs1
HDMI Connections1vs1
DisplayPort Connections-vs-

GPU Power Requirements

Max Power65 Wattsvs50 Watts
Recommended PSU350 Watts & 26 Ampsvs350 Watts & 20 Amps

GPU Features

Shader Model5.0vs4.0
Open GL4.5vs3.3
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3220 3.3GHzvsIntel Core 2 Duo E8400 3.0GHz
Recommended RAM8 GBvs4 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.

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.

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.

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.

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.

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.
GeForce 9600 GT Asus Magic HDMI 512MB Edition is a special edition of GeForce 9600 GT 512MB.
This edition comes with one HDMI port and optimized for low power consumption. To achieve that, the Core-Clock was reduced by 50MHz to 600MHz and the GPU accesses DDR2 memory, leading to an over 50% slower operating memory clock.
As a result, the card allegedly consumes up to 40% less energy under load (and heats less) but it offers very little resilience to higher resolutions and has a relatively lower shading performance.
Recommended CPU
Possible GPU Upgrades
GPU Variants