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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 v3 Zotac 2GB Edition GeForce GTS 450
Red Dead Redemption 2 529% 435%
Cyberpunk 2077 765% 635%
Doom Eternal 441% 360%
Dragon Ball Z Kakarot 288% 230%
Call of Duty: Modern Warfare 529% 435%
Microsoft Flight Simulator 765% 635%
FIFA 20 235% 185%
Grand Theft Auto VI 862% 718%
Star Wars: Jedi - Fallen Order 765% 635%
Need For Speed Heat 529% 435%

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

The GT 640 has a 263 MHz higher core clock speed than the GeForce GTS 450, but the GeForce GTS 450 has 16 more Texture Mapping Units than the GT 640. As a result, the GeForce GTS 450 exhibits a 8.4 GTexel/s better Texture Fill Rate than the GT 640. 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 263 MHz higher core clock speed than the GeForce GTS 450, but the GeForce GTS 450 has 8 more Render Output Units than the GT 640. As a result, the GeForce GTS 450 exhibits a 4.1 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 over a year more recently than the GeForce GTS 450, and so the GT 640 is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GeForce GTS 450.

The GT 640 has 1024 MB more video memory than the GeForce GTS 450, so is likely to be much better at displaying game textures at higher resolutions. However, the overall memory performance is about the same.

The GeForce GTS 450 has 17.6 GB/sec greater memory bandwidth than the GT 640, which means that the memory performance of the GeForce GTS 450 is slightly better than the GT 640.

The GeForce GT 640 v3 Zotac 2GB Edition has 384 Shader Processing Units and the GeForce GTS 450 has 192. However, the actual shader performance of the GT 640 is 402 and the actual shader performance of the GeForce GTS 450 is 301. The GT 640 having 101 better shader performance is not particularly notable, as altogether the GeForce GTS 450 performs better when taking into account other relevant data.

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

The GeForce GT 640 v3 Zotac 2GB Edition requires 49 Watts to run and the GeForce GTS 450 requires 106 Watts. We would recommend a PSU with at least 350 Watts for the GT 640 and a PSU with at least 400 Watts for the GeForce GTS 450. The GeForce GTS 450 requires 57 Watts more than the GT 640 to run. The difference is significant enough that the GeForce GTS 450 may have an adverse affect on your yearly electricity bills in comparison to the GT 640.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1046 MHzvs783 MHz
Boost Clock-vs-
ArchitectureKepler GK208-400-A1Fermi GF106-250-KA-A1
OC Potential Poor vs Fair
Driver Support Good vs Poor
Release Date29 May 2013vs03 Sep 2010
GPU LinkGD LinkGD Link

Resolution Performance

1366x768 - vs green tick
vs green tick
vs green tick
vs green tick
green tick vs -

GPU Memory

Memory2048 MBvs1024 MB
Memory Speed1252 MHzvs902 MHz
Memory Bus64 Bitvs128 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth40.1GB/secvs57.7GB/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%

GPU Display

Shader Processing Units384vs192
Actual Shader Performance19%vs14%
Texture Mapping Units16vs32
Texture Rate16.7 GTexel/svs25.1 GTexel/s
Render Output Units8vs16
Pixel Rate8.4 GPixel/svs12.5 GPixel/s

GPU Outputs

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

GPU Power Requirements

Max Power49 Wattsvs106 Watts
Recommended PSU350 Watts & 26 Ampsvs400 Watts & 29 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 i3-560 3.3GHz
Recommended RAM8 GBvs4 GB
Maximum Recommended Gaming Resolution1366x768vs1600x900

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.

Without Overclocking Out of The Box, GeForce GT 640 v3 Zotac 2GB Edition is as fast as the reference GeForce GT 640 v3.
GeForce GTS 450 is a fast-middle-class Graphics Card based on the first revision of the Fermi 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.

It equips a GPU Codenamed GF106-250-KA-A1 which has 4 Stream Multiprocessors activated and thus offers 192 Shader Processing Units, 32 TMUs and 16 ROPs. The Central Unit is clocked at 783MHz.

The GPU accesses a 1GB 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.

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.

Gaming benchmarks put its performance considerably 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.
Recommended CPU
Possible GPU Upgrades
GPU Variants