Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 EVGA 4GB Edition GeForce GT 640 v3 Zotac 2GB Edition
Halo: Reach 100% 100%
Cyberpunk 2077 765% 765%
Dragon Ball Z Kakarot 288% 288%
Red Dead Redemption 2 529% 529%
Call of Duty: Modern Warfare 529% 529%
Microsoft Flight Simulator 765% 765%
Doom Eternal 441% 441%
Grand Theft Auto VI 862% 862%
FIFA 20 235% 235%
Need For Speed Heat 529% 529%

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

The GT 640 has a 145 MHz higher core clock speed than the GT 640, but the GT 640 has 16 more Texture Mapping Units than the GT 640. As a result, the GT 640 exhibits a 12.1 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 145 MHz higher core clock speed than the GT 640, but the GT 640 has 8 more Render Output Units than the GT 640. As a result, the GT 640 exhibits a 6 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 GT 640, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The GT 640 has 2048 MB more video memory than the GT 640, so is likely to be much better at displaying game textures at higher resolutions. However, overall, the GT 640 has superior memory performance.

The GT 640 has 18.8 GB/sec greater memory bandwidth than the GT 640, which means that the memory performance of the GT 640 is slightly better than the GT 640.

Both the GeForce GT 640 EVGA 4GB Edition and the GeForce GT 640 v3 Zotac 2GB Edition have 384 Shader Processing Units. While the two GPUs have the same number of SPUs, the actual performance delivered by the GT 640 is 402 and by the GT 640 is 402. Knowing that the shader performance of the GT 640 is superior, it is not necessary to examine the GPUs' respective Texture and Pixel Fill Rates.

The GeForce GT 640 EVGA 4GB Edition requires 65 Watts to run and the GeForce GT 640 v3 Zotac 2GB Edition requires 49 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 GT 640. The GT 640 requires 16 Watts more than the GT 640 to run. The difference is not significant enough for the GT 640 to have a noticeably larger impact on your yearly electricity bills than the GT 640.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed901 MHzvs1046 MHz
Boost Clock-vs-
ArchitectureKepler GK107-300-A2Kepler GK208-400-A1
OC Potential Fair vs Poor
Driver Support Good vs Good
Release Date08 Jun 2012vs29 May 2013
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

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

GPU Memory

Memory4096 MBvs2048 MB
Memory Speed667 MHzvs1252 MHz
Memory Bus128 Bitvs64 Bit
Memory TypeDDR3vsGDDR5
Memory Bandwidth21.3GB/secvs40.1GB/sec
L2 Cache 256 KB green tick vs 128 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units384vs384
Actual Shader Performance17%vs19%
Technology28nmvs28nm
Texture Mapping Units32vs16
Texture Rate28.8 GTexel/svs16.7 GTexel/s
Render Output Units16vs8
Pixel Rate14.4 GPixel/svs8.4 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs1
DVI Connections2vs1
HDMI Connections1vs1
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power65 Wattsvs49 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/Crossfirenovsno
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3220 3.3GHzvsIntel Core i3-3220 3.3GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1366x768vs1366x768

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GT 640 EVGA 4GB Edition is a special edition of NVIDIA's Middle-Class GeForce GT 640, created by EVGA.

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

Overclock: Memory Clock
The Operating Memory Clock is now of 667MHz while the Frame Buffer was doubled to 4GB. This is a gimmick and in no way benefits the GPU.

Cooling Solution
The Cooling System remains the same.

Performance
Without Overclocking Out of The Box, GeForce GT 640 EVGA 4GB Edition is as fast as the reference GeForce GT 640.
Overview
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.
Recommended CPU
Possible GPU Upgrades
GPU Variants
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