Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 GeForce GTS 450 v2
Cyberpunk 2077 653% 495%
Hitman 3 880% 674%
Assassins Creed: Valhalla 589% 444%
Resident Evil 8 653% 495%
FIFA 21 280% 200%
Grand Theft Auto VI 960% 737%
Call of Duty: Black Ops Cold War 567% 426%
Genshin Impact 653% 495%
The Medium 840% 642%
Far Cry 6 990% 761%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTS 450 v2 are noticeably better than the Nvidia GeForce GT 640.

The GeForce GT 640 has a 112 MHz higher core clock speed and 8 more Texture Mapping Units than the GTS 450. This results in the GeForce GT 640 providing 9.9 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 112 MHz higher core clock speed than the GTS 450, but the GTS 450 has 8 more Render Output Units than the GeForce GT 640. As a result, the GTS 450 exhibits a 4.6 GPixel/s better Pixel Fill Rate than the GeForce GT 640. 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 a year more recently than the GTS 450, and so the GeForce GT 640 is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GTS 450.

The GeForce GT 640 has 512 MB more video memory than the GTS 450, so is likely to be much better at displaying game textures at higher resolutions. However, overall, the GTS 450 has superior memory performance.

The GTS 450 has 58.1 GB/sec greater memory bandwidth than the GeForce GT 640, which means that the memory performance of the GTS 450 is much better than the GeForce GT 640.

The GeForce GT 640 has 384 Shader Processing Units and the GeForce GTS 450 v2 has 144. However, the actual shader performance of the GeForce GT 640 is 346 and the actual shader performance of the GTS 450 is 228. The GeForce GT 640 having 118 better shader performance is not particularly notable, as altogether the GTS 450 performs better when taking into account other relevant data.

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.

The GeForce GT 640 requires 65 Watts to run and the GeForce GTS 450 v2 requires 106 Watts. We would recommend a PSU with at least 350 Watts for the GeForce GT 640 and a PSU with at least 400 Watts for the GTS 450. The GTS 450 requires 41 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 Speed902 MHzvs790 MHz
Boost Clock-vs-
ArchitectureKepler GK107-300-A2Fermi GF106-250-KB-A1
OC Potential Fair vs Poor
Driver Support Good vs Poor
Release Date05 Jun 2012vs11 Oct 2010
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
6.6
vs green tick
7.4
1600x900
5.1
vs green tick
5.6
1920x1080
3.5
vs green tick
4.2
2560x1440
2.5
vs green tick
2.7
3840x2160
1.7
green tick vs -

GPU Memory

Memory2048 MBvs1536 MB
Memory Speed891 MHzvs902 MHz
Memory Bus128 Bitvs192 Bit
Memory TypeDDR3vsGDDR5
Memory Bandwidth28.5GB/secvs86.6GB/sec
L2 Cache 256 KB vs green tick 384 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units384vs144
Actual Shader Performance17%vs11%
Technology28nmvs40nm
Texture Mapping Units32vs24
Texture Rate28.9 GTexel/svs19 GTexel/s
Render Output Units16vs24
Pixel Rate14.4 GPixel/svs19 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs2560x1600
VGA Connections1vs0
DVI Connections1vs2
HDMI Connections1vs1
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power65 Wattsvs106 Watts
Recommended PSU350 Watts & 26 Ampsvs400 Watts & 29 Amps

GPU Features

DirectX12.0vs12.0
Shader Model5.0vs5.0
Open GL4.5vs4.5
Open CL-vs-
Notebook GPUnono
SLI/Crossfirenovsyes
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3220 3.3GHz-
Recommended RAM8 GBvs4 GB
Maximum Recommended Gaming Resolution1366x768vs1600x900

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.
Overview
GeForce GTS 450 v2 is an OEM only fast-middle-class Graphics Card based on the second revision of the Fermi Architecture.

Architecture
The Fermi Architecture is manufactured with a 40nm technology and uses a technique known as Hot Clocking: The Shaders are clocked twice as fast as the Central Unit. While this leads to a reasonable performance boost, it causes enormous amounts of energy dissipation, leading, ultimately, to a significantly higher operating temperature.
Fermi is also the first GPU architecture with fully cached memory access which increases memory performance.

GPU
It equips a GPU Codenamed GF106-250-KB-A1 which has 3 Stream Multiprocessors activated and thus offers 144 Shader Processing Units, 24 TMUs and 24 ROPs. The Central Unit is clocked at 790MHz.

Memory
The GPU accesses a 1.5GB frame buffer of fast GDDR5, through a 128-bit memory interface. The size of the frame buffer is adequate. The Memory Clock Operates at 902MHz.

Features
DirectX 11.0 Support (11.0 Hardware Default) and support for SLI, 3D Vision Surround, PhysX, Realtime Raytracing and other technologies.

Cooling Solution
The Cooling Solution consists of a Single-Fan.

Power Consumption
With a rated board TDP of 106W, it requires at least a 400W PSU and an available 6-pin connector.

Performance
Gaming benchmarks put its performance slightly above Radeon HD 6670.

System Suggestions
We recommend a decent processor (Intel Core i3) and 4GB of RAM for a system with GeForce GTS 450 v2.
Recommended CPU
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Possible GPU Upgrades
GPU Variants
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