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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GT 640 v3 Zotac 2GB Edition Radeon R9 270X Sapphire Dual-X 4GB OC Edition

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon R9 270X Sapphire Dual-X 4GB OC Edition are massively better than the Nvidia GeForce GT 640 v3 Zotac 2GB Edition.

The GT 640 has a 26 MHz higher core clock speed than the R9 270X, but the R9 270X has 64 more Texture Mapping Units than the GT 640. As a result, the R9 270X exhibits a 64.9 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 26 MHz higher core clock speed than the R9 270X, but the R9 270X has 24 more Render Output Units than the GT 640. As a result, the R9 270X exhibits a 24.2 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 R9 270X 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 R9 270X has 2048 MB more video memory than the GT 640, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the R9 270X also has superior memory performance overall.

The R9 270X has 139.1 GB/sec greater memory bandwidth than the GT 640, which means that the memory performance of the R9 270X is massively better than the GT 640.

The GeForce GT 640 v3 Zotac 2GB Edition has 384 Shader Processing Units and the Radeon R9 270X Sapphire Dual-X 4GB OC Edition has 1280. However, the actual shader performance of the GT 640 is 402 and the actual shader performance of the R9 270X is 1164. The R9 270X having 762 better shader performance and an altogether better performance when taking into account other relevant data means that the R9 270X delivers a massively smoother and more efficient experience when processing graphical data than the GT 640.

The GeForce GT 640 v3 Zotac 2GB Edition requires 49 Watts to run and the Radeon R9 270X Sapphire Dual-X 4GB OC Edition requires 180 Watts. We would recommend a PSU with at least 350 Watts for the GT 640 and a PSU with at least 500 Watts for the R9 270X. The R9 270X requires 131 Watts more than the GT 640 to run. The difference is significant enough that the R9 270X may have an adverse affect on your yearly electricity bills in comparison to the GT 640.

Can I Run It

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GPU Architecture

Core Speed1046 MHzvs1020 MHz
Boost Clock-vs1070 MHz
ArchitectureKepler GK208-400-A1GCN 1.1 Curacao XT
OC Potential Poor vs Poor
Driver Support Good vs Great
Release Date29 May 2013vs08 Oct 2013
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - green tick vs green tick -
1600x900
5.2
vs green tick
9.5
1920x1080
3.9
vs green tick
7.6
2560x1440
2.6
vs green tick
5.5
3840x2160
1.8
vs green tick
4

GPU Memory

Memory2048 MBvs4096 MB
Memory Speed1252 MHzvs1400 MHz
Memory Bus64 Bitvs256 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth40.1GB/secvs179.2GB/sec
L2 Cache 128 KB vs green tick 512 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units384vs1280
Actual Shader Performance19%vs56%
Technology28nmvs28nm
Texture Mapping Units16vs80
Texture Rate16.7 GTexel/svs81.6 GTexel/s
Render Output Units8vs32
Pixel Rate8.4 GPixel/svs32.6 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections1vs0
DVI Connections1vs2
HDMI Connections1vs1
DisplayPort Connections-vs-
Comparison

GPU Power Requirements

Max Power49 Wattsvs180 Watts
Recommended PSU350 Watts & 26 Ampsvs500 Watts

GPU Features

DirectX12.0vs12.0
Shader Model5.0vs5.0
Open GL4.5vs4.4
Open CL-vs-
Notebook GPUnono
SLI/Crossfirenovsyes
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i3-3220 3.3GHzvsIntel Core i5-4430 3.0GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1366x768vs1920x1080

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.
Radeon R9 270X Sapphire Dual-X 4GB OC Edition is a special edition of the high-end Radeon R9 270X.
This edition comes with a custom cooling system called "Vapor-X", which reduces the card's temperature under load, significantly and comes overclocked out of the box in the central unit that was increased from 1000MHz to 1020MHz, while the Boost clock is now of 1070MHz.
Furthermore, the card has twice as much memory when compared to the reference card. However, this card will not benefit from extra memory and thus such feature ends up being useless.
Expect little or no performance boost over the standard edition and exactly the same performance as "Radeon R9 270X Sapphire Dual-X 2GB OC Edition"
Recommended CPUIntel Celeron J1850 2.0GHz
AMD Athlon II X2 255
Intel Pentium Dual Core E5800 3.20GHz
AMD Athlon II X2 245
Intel Pentium Dual Core E5700 3GHz
Intel Xeon E5-2620 v2
Intel Core i7-2600S 4-Core 2.8GHz
Intel Core i3-7320 2-Core 4.1GHz
Intel Core i5-2550K 3.4GHz
Intel Core i5-4460S 2.9GHz
Possible GPU UpgradesRadeon R7 260X v2 MSI OC v2 2GB Edition
Radeon HD 6870 XFX DD XXX Edition
Radeon HD 6870 XFX Black Edition
GeForce GTX 560 Club3D CoolStream Super OC 1GB Edition
GeForce GTX 560 EVGA DS SSC 1GB Edition
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GPU Variants--

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