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Gaming Performance Comparison

Recommended System Requirements
Game Radeon R9 270 Gigabyte WindForce 2X OC Edition GeForce GTX 660 Zotac AMP Edition
Red Dead Redemption 2 100% 106%
Halo: Reach 37% 35%
Cyberpunk 2077 174% 183%
Call of Duty: Modern Warfare 100% 106%
Doom Eternal 72% 77%
Microsoft Flight Simulator 174% 183%
Grand Theft Auto VI 205% 215%
Dragon Ball Z Kakarot 23% 27%
Star Wars: Jedi - Fallen Order 174% 183%
Need For Speed Heat 100% 106%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon R9 270 Gigabyte WindForce 2X OC Edition are marginally better than the Nvidia GeForce GTX 660 Zotac AMP Edition.

The GTX 660 has a 96 MHz higher core clock speed and the same number of Texture Mapping Units as the R9 270. This results in the GTX 660 providing 7.7 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 GTX 660 has a 96 MHz higher core clock speed than the R9 270, but the R9 270 has 8 more Render Output Units than the GTX 660. As a result, the R9 270 exhibits a 5.3 GPixel/s better Pixel Fill Rate than the GTX 660. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.

The R9 270 was released over a year more recently than the GTX 660, and so the R9 270 is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GTX 660.

Both GPUs exhibit very powerful performance, so it probably isn't worth upgrading from one to the other, as both are capable of running even the most demanding games at the highest settings.

The Radeon R9 270 Gigabyte WindForce 2X OC Edition and the GeForce GTX 660 Zotac AMP Edition have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The R9 270 has 20.6 GB/sec greater memory bandwidth than the GTX 660, which means that the memory performance of the R9 270 is slightly better than the GTX 660.

The Radeon R9 270 Gigabyte WindForce 2X OC Edition has 1280 Shader Processing Units and the GeForce GTX 660 Zotac AMP Edition has 960. However, the actual shader performance of the R9 270 is 1061 and the actual shader performance of the GTX 660 is 1067. The GTX 660 having 6 better shader performance is not particularly notable, as altogether the R9 270 performs better when taking into account other relevant data.

The Radeon R9 270 Gigabyte WindForce 2X OC Edition requires 175 Watts to run but there is no entry for the GeForce GTX 660 Zotac AMP Edition. We would recommend a PSU with at least 500 Watts for the R9 270.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed950 MHzvs1046 MHz
Boost Clock975 MHzvs1111 MHz
ArchitectureGCN 1.1 Curacao PROKepler GK106-400-A1
OC Potential Fair vs Poor
Driver Support Great vs Good
Release Date13 Nov 2013vs01 Sep 2012
GPU LinkGD LinkGD Link

Resolution Performance

1366x768 - green tick vs green tick -
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GPU Memory

Memory2048 MBvs2048 MB
Memory Speed1400 MHzvs1652 MHz
Memory Bus256 Bitvs192 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth179.2GB/secvs158.6GB/sec
L2 Cache 512 KB green tick vs 384 KB
Delta Color Compression no vs no
Memory Performance 0% green tick vs green tick 0%

GPU Display

Shader Processing Units1280vs960
Actual Shader Performance51%vs51%
Texture Mapping Units80vs80
Texture Rate76 GTexel/svs83.7 GTexel/s
Render Output Units32vs24
Pixel Rate30.4 GPixel/svs25.1 GPixel/s

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs0
DVI Connections2vs2
HDMI Connections1vs1
DisplayPort Connections-vs-

GPU Power Requirements

Max Power175 Watts-
Recommended PSU500 Watts-

GPU Features

Shader Model5.0vs5.0
Open GL4.4vs4.5
Open CL-vs-
Notebook GPUnono

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-4430 3.0GHzvsIntel Core i5-3470 3.2GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1920x1080vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewRadeon R9 270 Gigabyte WindForce 2X OC Edition is a special edition of the fast-middle-class Radeon R9 270.
This edition comes with a custom cooling system called "WindForce 2X", which reduces the card's temperature under load, significantly and comes overclocked out of the box in the central unit that was increased from 900MHz to 925MHz, while the Boost clock is now of 975MHz.
Benchmarks indicate a 3% performance boost over the standard edition.
GeForce GTX 660 Zotac AMP Edition a special edition of GeForce GTX 660.
The new features include a new cooling system and in terms of overclocking, the base-clock was increased from 980MHz to 1046MHz and the boost clock can now reach 1111MHz, instead of 1033MHz. The memory clock was raised to 1652MHz.
Benchmarks indicate a 5.5% performance when compared to the reference card.
Recommended CPU
Possible GPU Upgrades
GPU Variants