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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 GeForce GTS 450 v4 Palit 1GB Edition
Cyberpunk 2077 653% 653%
Assassins Creed: Valhalla 589% 589%
Call of Duty: Black Ops Cold War 567% 567%
Hitman 3 880% 880%
Grand Theft Auto VI 960% 960%
FIFA 21 280% 280%
Far Cry 6 990% 990%
Genshin Impact 653% 653%
World of Warcraft: Shadowlands 980% 980%
Watch Dogs Legion 627% 627%

In terms of overall gaming performance, the graphical capabilities of the GeForce GT 640 and the GTS 450 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 GT 640 has 384 Shader Processing Units and the GeForce GTS 450 v4 Palit 1GB Edition has 144. However, the actual shader performance of the GeForce GT 640 is 346 and the actual shader performance of the GTS 450 is 226. 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 GT 640 requires 65 Watts to run and the GeForce GTS 450 v4 Palit 1GB Edition requires 96 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 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 Speed902 MHzvs783 MHz
Boost Clock-vs-
ArchitectureKepler GK107-300-A2Fermi GF106-250-KA-A1
OC Potential Fair vs Fair
Driver Support Good vs Poor
Release Date05 Jun 2012vs11 Jul 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
6.6
green tick vs -
1600x900
5.1
vs green tick
5.2
1920x1080
3.5
green tick vs green tick
3.5
2560x1440
2.5
green tick vs
2.4
3840x2160
1.7
green tick vs -

GPU Memory

Memory2048 MBvs1024 MB
Memory Speed891 MHzvs700 MHz
Memory Bus128 Bitvs128 Bit
Memory TypeDDR3vsDDR3
Memory Bandwidth28.5GB/secvs22.4GB/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%
Comparison

GPU Display

Shader Processing Units384vs144
Actual Shader Performance17%vs11%
Technology28nmvs40nm
Texture Mapping Units32vs24
Texture Rate28.9 GTexel/svs18.8 GTexel/s
Render Output Units16vs16
Pixel Rate14.4 GPixel/svs12.5 GPixel/s
Comparison

GPU Outputs

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

GPU Power Requirements

Max Power65 Wattsvs96 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 3.3GHzvsIntel Core i3-3220 3.3GHz
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.

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 v4 Palit 1GB Edition is a special edition of NVIDIA's fast-middle-class GeForce GTS 450 v4, created by Palit.

Overclock Out of The Box
The Clock Frequencies of both Central Unit and Operating Memory Clock Remain the Same.

Cooling Solution
The Cooling System remains the same.

Performance
Without Overclocking Out of The Box, GeForce GTS 450 v4 Palit 1GB Edition is as fast as the reference GeForce GTS 450 v4.
Recommended CPU
Possible GPU Upgrades
GPU Variants
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