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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 v3 Zotac 2GB Edition Radeon HD 5670 Gigabyte 1GB OC Edition
Red Dead Redemption 2 529% 705%
Doom Eternal 441% 592%
Cyberpunk 2077 765% 1006%
Call of Duty: Modern Warfare 529% 705%
Dragon Ball Z Kakarot 288% 397%
Microsoft Flight Simulator 765% 1006%
Star Wars: Jedi - Fallen Order 765% 1006%
Grand Theft Auto VI 862% 1130%
Need For Speed Heat 529% 705%
Warcraft 3: Reforged 76% 69%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GT 640 v3 Zotac 2GB Edition are noticeably better than the AMD Radeon HD 5670 Gigabyte 1GB OC Edition.

The GT 640 has a 96 MHz higher core clock speed than the HD 5670, but the HD 5670 has 4 more Texture Mapping Units than the GT 640. As a result, the HD 5670 exhibits a 2.3 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 96 MHz higher core clock speed than the HD 5670 and the same number of Render Output Units. This results in the GT 640 providing 0.8 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 GT 640 was released over three years more recently than the HD 5670, and so the GT 640 is likely to have far better driver support, meaning it will be much more optimized and ultimately superior to the HD 5670 when running the latest games.

The GT 640 has 1024 MB more video memory than the HD 5670, so is likely to be much better at displaying game textures at higher resolutions. However, the overall memory performance is about the same.

The HD 5670 has 23.9 GB/sec greater memory bandwidth than the GT 640, which means that the memory performance of the HD 5670 is slightly better than the GT 640.

The GeForce GT 640 v3 Zotac 2GB Edition has 384 Shader Processing Units and the Radeon HD 5670 Gigabyte 1GB OC Edition has 400. However, the actual shader performance of the GT 640 is 402 and the actual shader performance of the HD 5670 is 190. The GT 640 having 212 better shader performance is not particularly notable, as altogether the HD 5670 performs better when taking into account other relevant data.

The GT 640 transistor size technology is 12 nm (nanometers) smaller than the HD 5670. This means that the GT 640 is expected to run slightly cooler and achieve higher clock frequencies than the HD 5670.

The GeForce GT 640 v3 Zotac 2GB Edition requires 49 Watts to run but there is no entry for the Radeon HD 5670 Gigabyte 1GB OC Edition. We would recommend a PSU with at least 350 Watts for the GT 640.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1046 MHzvs950 MHz
Boost Clock-vs-
ArchitectureKepler GK208-400-A1Terascale 2 Redwood XT
OC Potential Poor vs Poor
Driver Support Good vs Poor
Release Date29 May 2013vs01 Jan 2010
GPU LinkGD LinkGD Link

Resolution Performance

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

GPU Memory

Memory2048 MBvs1024 MB
Memory Speed1252 MHzvs1000 MHz
Memory Bus64 Bitvs128 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth40.1GB/secvs64GB/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 Units384vs400
Actual Shader Performance19%vs9%
Texture Mapping Units16vs20
Texture Rate16.7 GTexel/svs19 GTexel/s
Render Output Units8vs8
Pixel Rate8.4 GPixel/svs7.6 GPixel/s

GPU Outputs

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

GPU Power Requirements

Max Power49 Watts-
Recommended PSU350 Watts & 26 Amps-

GPU Features

Shader Model5.0vs5.0
Open GL4.5vs4.3
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3220 3.3GHzvsIntel Pentium Dual Core E5500 2.8GHz
Recommended RAM8 GBvs4 GB
Maximum Recommended Gaming Resolution1366x768vs1440x900

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.
Radeon HD 5670 Gigabyte 1GB OC Edition is a special edition of the middle-class Radeon HD 5670.
This edition features a new cooling system and overclocking out of the box in the core-clock from 775MHz to 950MHz.
There are no benchmarks available and so this GPU's rank is predicted.
Recommended CPU
Possible GPU Upgrades
GPU Variants