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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTS 450 v4 Gainward 1GB Edition GeForce GT 640
Cyberpunk 2077 653% 653%
Hitman 3 880% 880%
Assassins Creed: Valhalla 589% 589%
Resident Evil 8 653% 653%
FIFA 21 280% 280%
Grand Theft Auto VI 960% 960%
Call of Duty: Black Ops Cold War 567% 567%
Genshin Impact 653% 653%
The Medium 840% 840%
Far Cry 6 990% 990%

In terms of overall gaming performance, the graphical capabilities of the GTS 450 and the GeForce GT 640 are equal.

The GeForce GT 640 has a 119 MHz higher core clock speed and 8 more Texture Mapping Units than the GTS 450. This results in the GeForce GT 640 providing 10.1 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 119 MHz higher core clock speed than the GTS 450 and the same number of Render Output Units. This results in the GeForce GT 640 providing 1.9 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 GTS 450 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 1024 MB more video memory than the GTS 450, 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 6.1 GB/sec greater memory bandwidth than the GTS 450, which means that the memory performance of the GeForce GT 640 is marginally better than the GTS 450.

The GeForce GTS 450 v4 Gainward 1GB Edition has 144 Shader Processing Units and the GeForce GT 640 has 384. However, the actual shader performance of the GTS 450 is 226 and the actual shader performance of the GeForce GT 640 is 346. The GeForce GT 640 having 120 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 GTS 450.

The GeForce GT 640 transistor size technology is 12 nm (nanometers) smaller than the GTS 450. This means that the GeForce GT 640 is expected to run slightly cooler and achieve higher clock frequencies than the GTS 450. While they exhibit similar graphical performance, the GeForce GT 640 should consume less power than the GTS 450.

The GeForce GTS 450 v4 Gainward 1GB Edition requires 96 Watts to run and the GeForce GT 640 requires 65 Watts. We would recommend a PSU with at least 400 Watts for the GTS 450 and a PSU with at least 350 Watts for the GeForce GT 640. The GTS 450 requires 31 Watts more than the GeForce GT 640 to run. The difference is significant enough that the GTS 450 may have a slight adverse affect on your yearly electricity bills in comparison to the GeForce GT 640.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed783 MHzvs902 MHz
Boost Clock-vs-
ArchitectureFermi GF106-250-KA-A1Kepler GK107-300-A2
OC Potential Fair vs Fair
Driver Support Poor vs Good
Release Date11 Jul 2012vs05 Jun 2012
GPU LinkGD LinkGD Link

Resolution Performance

green tick vs
green tick vs
green tick vs green tick
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3840x2160 - vs green tick

GPU Memory

Memory1024 MBvs2048 MB
Memory Speed700 MHzvs891 MHz
Memory Bus128 Bitvs128 Bit
Memory TypeDDR3vsDDR3
Memory Bandwidth22.4GB/secvs28.5GB/sec
L2 Cache 256 KB green tick vs green tick 256 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units144vs384
Actual Shader Performance11%vs17%
Texture Mapping Units24vs32
Texture Rate18.8 GTexel/svs28.9 GTexel/s
Render Output Units16vs16
Pixel Rate12.5 GPixel/svs14.4 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)2560x1600vs4096x2160
VGA Connections1vs1
DVI Connections1vs1
HDMI Connections1vs1
DisplayPort Connections0vs-

GPU Power Requirements

Max Power96 Wattsvs65 Watts
Recommended PSU400 Watts & 29 Ampsvs350 Watts & 26 Amps

GPU Features

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

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3220 3.3GHzvsIntel Core i3-3220 3.3GHz
Recommended RAM4 GBvs8 GB
Maximum Recommended Gaming Resolution1366x768vs1366x768

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GTS 450 v4 Gainward 1GB Edition is a special edition of NVIDIA's Fast-Middle-Class GeForce GTS 450, created by Palit.

Overclock: Central Unit

Overclock: Memory Clock

Frame Buffer

Cooling Solution

Benchmarks indicate no Performance Boost over the reference GeForce GTS 450 v4.
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.
Recommended CPU
Possible GPU Upgrades
GPU Variants