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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 v3 Zotac 2GB Edition GeForce GTS 450 v4 Asus 1GB Edition
Red Dead Redemption 2 529% 693%
Cyberpunk 2077 765% 989%
Doom Eternal 441% 581%
Call of Duty: Modern Warfare 529% 693%
Dragon Ball Z Kakarot 288% 389%
Halo: Reach 100% 152%
Microsoft Flight Simulator 765% 989%
Star Wars: Jedi - Fallen Order 765% 989%
Grand Theft Auto VI 862% 1111%
Need For Speed Heat 529% 693%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GT 640 v3 Zotac 2GB Edition are noticeably better than the Nvidia GeForce GTS 450 v4 Asus 1GB Edition.

The GT 640 has a 452 MHz higher core clock speed but 8 fewer Texture Mapping Units than the GTS 450. The lower TMU count doesn't matter, though, as altogether the GT 640 manages to provide 2.4 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 GT 640 has a 452 MHz higher core clock speed than the GTS 450, but the GTS 450 has 8 more Render Output Units than the GT 640. As a result, the GTS 450 exhibits a 1.1 GPixel/s better Pixel Fill Rate than the GT 640. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The GT 640 was released less than a year after the GTS 450, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The 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 GT 640 also has superior memory performance overall.

The GT 640 has 14.5 GB/sec greater memory bandwidth than the GTS 450, which means that the memory performance of the GT 640 is slightly better than the GTS 450.

The GeForce GT 640 v3 Zotac 2GB Edition has 384 Shader Processing Units and the GeForce GTS 450 v4 Asus 1GB Edition has 144. However, the actual shader performance of the GT 640 is 402 and the actual shader performance of the GTS 450 is 171. The GT 640 having 231 better shader performance and an altogether better performance when taking into account other relevant data means that the GT 640 delivers a slightly smoother and more efficient experience when processing graphical data than the GTS 450.

The GT 640 transistor size technology is 12 nm (nanometers) smaller than the GTS 450. This means that the GT 640 is expected to run slightly cooler and achieve higher clock frequencies than the GTS 450.

The GeForce GT 640 v3 Zotac 2GB Edition requires 49 Watts to run and the GeForce GTS 450 v4 Asus 1GB Edition requires 75 Watts. We would recommend a PSU with at least 350 Watts for the GT 640 and a PSU with at least 350 Watts for the GTS 450. The GTS 450 requires 26 Watts more than the GT 640 to run. The difference is not significant enough for the GTS 450 to have a noticeably larger impact on your yearly electricity bills than the GT 640.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1046 MHzvs594 MHz
Boost Clock-vs-
ArchitectureKepler GK208-400-A1Fermi GF106-250-KA-A1
OC Potential Poor vs Good
Driver Support Good vs Poor
Release Date29 May 2013vs11 Jul 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - green tick vs green tick -
1600x900
5.2
green tick vs
5
1920x1080
3.9
green tick vs
3.3
2560x1440
2.6
green tick vs
2.3
3840x2160
1.8
green tick vs -

GPU Memory

Memory2048 MBvs1024 MB
Memory Speed1252 MHzvs800 MHz
Memory Bus64 Bitvs128 Bit
Memory TypeGDDR5vsDDR3
Memory Bandwidth40.1GB/secvs25.6GB/sec
L2 Cache 128 KB 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 Performance19%vs8%
Technology28nmvs40nm
Texture Mapping Units16vs24
Texture Rate16.7 GTexel/svs14.3 GTexel/s
Render Output Units8vs16
Pixel Rate8.4 GPixel/svs9.5 GPixel/s
Comparison

GPU Outputs

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

GPU Power Requirements

Max Power49 Wattsvs75 Watts
Recommended PSU350 Watts & 26 Ampsvs350 Watts & 26 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 v3 Zotac 2GB Edition is a special edition of NVIDIA's Middle-Class GeForce GT 640 v3, created by Zotac.

Overclock: Central Unit
The Central Unit runs at the same speed.

Overclock: Memory Clock
The Operating Memory Clock and the Frame Buffer remain the same.

Cooling Solution
The Cooling System has been replaced by Zotac's Silent Cooling Solution.

Performance
Without Overclocking Out of The Box, GeForce GT 640 v3 Zotac 2GB Edition is as fast as the reference GeForce GT 640 v3.
Overview
GeForce GTS 450 v4 Asus 1GB Edition is a special edition of NVIDIA's fast-middle-class GeForce GTS 450 v4, created by Asus.

Overclock Out of The Box
The Central unit is actually underclocked reducing the power consumption and thus reducing the heat produced. Also, the Graphics Card relies entirely on the PCI Slot for power, meaning no extra connectors are required.

Cooling Solution
The Cooling System was replaced by Asus's Dust Proof Fan, meaning the card runs cooler under load.

Performance
Because of being underclocked, GGeForce GTS 450 v4 Asus 1GB Edition is actually slower than the reference GeForce GTS 450 v4.
Recommended CPU
Possible GPU Upgrades
GPU Variants
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