Select any two GPUs for comparison

Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 7870 PowerColor Devil Edition GeForce GTX 660 Zotac AMP Edition
Red Dead Redemption 2 94% 106%
Halo: Reach 38% 35%
Cyberpunk 2077 167% 183%
Call of Duty: Modern Warfare 94% 106%
Doom Eternal 67% 77%
Microsoft Flight Simulator 167% 183%
Warcraft 3: Reforged 93% 92%
Grand Theft Auto VI 197% 215%
Star Wars: Jedi - Fallen Order 167% 183%
Dragon Ball Z Kakarot 20% 27%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 7870 PowerColor Devil Edition are very slightly better than the Nvidia GeForce GTX 660 Zotac AMP Edition.

The HD 7870 has a 54 MHz higher core clock speed and the same number of Texture Mapping Units as the GTX 660. This results in the HD 7870 providing 4.3 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 HD 7870 has a 54 MHz higher core clock speed and 8 more Render Output Units than the GTX 660. This results in the HD 7870 providing 10.1 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 GTX 660 was released less than a year after the HD 7870, and so they are likely to have similar driver support for optimizing performance when running the latest games.

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 HD 7870 PowerColor Devil 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 HD 7870 has 1.4 GB/sec greater memory bandwidth than the GTX 660, which means that the memory performance of the HD 7870 is marginally better than the GTX 660.

The Radeon HD 7870 PowerColor Devil Edition has 1024 Shader Processing Units and the GeForce GTX 660 Zotac AMP Edition has 960. However, the actual shader performance of the HD 7870 is 957 and the actual shader performance of the GTX 660 is 1067. The GTX 660 having 110 better shader performance is not particularly notable, as altogether the HD 7870 performs better when taking into account other relevant data.

We would recommend a PSU with at least 500 Watts for the HD 7870.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1100 MHzvs1046 MHz
Boost Clock-vs1111 MHz
ArchitectureGCN 1.0 Pitcairn XTKepler GK106-400-A1
OC Potential Poor vs Poor
Driver Support Good vs Good
Release Date01 May 2012vs01 Sep 2012
GPU LinkGD LinkGD Link

Resolution Performance

1366x768 - green tick vs green tick -
green tick vs
green tick vs
green tick vs
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GPU Memory

Memory2048 MBvs2048 MB
Memory Speed1250 MHzvs1652 MHz
Memory Bus256 Bitvs192 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth160GB/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 Units1024vs960
Actual Shader Performance46%vs51%
Texture Mapping Units80vs80
Texture Rate88 GTexel/svs83.7 GTexel/s
Render Output Units32vs24
Pixel Rate35.2 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 Power--
Recommended PSU500 Watts-

GPU Features

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

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-3570K 3.4GHzvsIntel Core i5-3470 3.2GHz
Recommended RAM8 GBvs8 GB
Maximum Recommended Gaming Resolution1920x1080vs1920x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewRadeon HD 7870 PowerColor Devil Edition is a special edition of the powerful Radeon HD 7870. See the standard version for more information about it.
The differences include an increase in the core-clock that went from 1000MHz to 1100MHz, memory clock, once 1200MHz and now 1250MHz a new quiet and efficient cooling system is also available.
Benchmarks indicate a 6% performance boost when compared to the standard Radeon HD 7870.
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