Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 7870 Double D Black Edition GeForce GTX 660 Zotac AMP Edition
Red Dead Redemption 2 98% 106%
Doom Eternal 70% 77%
Cyberpunk 2077 172% 183%
Call of Duty: Modern Warfare 98% 106%
Dragon Ball Z Kakarot 22% 27%
Microsoft Flight Simulator 172% 183%
Star Wars: Jedi - Fallen Order 172% 183%
Grand Theft Auto VI 202% 215%
Need For Speed Heat 98% 106%
Warcraft 3: Reforged 92% 92%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 7870 Double D Black Edition are marginally better than the Nvidia GeForce GTX 660 Zotac AMP Edition.

The HD 7870 has a 4 MHz higher core clock speed and the same number of Texture Mapping Units as the GTX 660. This results in the HD 7870 providing 0.3 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 4 MHz higher core clock speed and 8 more Render Output Units than the GTX 660. This results in the HD 7870 providing 8.5 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 Double D Black 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 Double D Black Edition has 1280 Shader Processing Units and the GeForce GTX 660 Zotac AMP Edition has 960. However, the actual shader performance of the HD 7870 is 1142 and the actual shader performance of the GTX 660 is 1067. The HD 7870 having 75 better shader performance and an altogether better performance when taking into account other relevant data means that the HD 7870 delivers a marginally smoother and more efficient experience when processing graphical data than the GTX 660.

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

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed1050 MHzvs1046 MHz
Boost Clock-vs1111 MHz
ArchitectureGCN 1.0 Pitcairn XTKepler GK106-400-A1
OC Potential Fair vs Poor
Driver Support Good vs Good
Release Date01 Aug 2012vs01 Sep 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - green tick vs green tick -
1600x900
9.4
green tick vs
9.1
1920x1080
7.3
green tick vs
7.2
2560x1440
5.5
green tick vs
5.2
3840x2160
3.8
green tick vs
3.5

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%
Comparison

GPU Display

Shader Processing Units1280vs960
Actual Shader Performance55%vs51%
Technology28nmvs28nm
Texture Mapping Units80vs80
Texture Rate84 GTexel/svs83.7 GTexel/s
Render Output Units32vs24
Pixel Rate33.6 GPixel/svs25.1 GPixel/s
Comparison

GPU Outputs

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

GPU Power Requirements

Max Power--
Recommended PSU500 Watts-

GPU Features

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

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 Double D Black Edition is a special edition of Radeon HD 7870.
This is one of today's most powerful editions of the reference as it features increases in both the core and memory clocks that went from 1000MHz to 1050MHz and from 1200MHz to 1250MHz.
Benchmarks indicate the performance boost is significant and about 4% compared to the reference card.
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
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