Select any two GPUs for comparison
VS

Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 7870 XT PowerColor Myst. Edition GeForce GTX 660 MSI Hawk 2GB Edition
Red Dead Redemption 2 91% 102%
Call of Duty: Modern Warfare 91% 102%
Cyberpunk 2077 163% 178%
Zombieland: Double Tap - Road Trip 79% 89%
Borderlands 3 102% 114%
FIFA 20 2% 8%
Microsoft Flight Simulator 163% 178%
Ghost Recon Breakpoint 189% 206%
eFootball PES 2020 30% 38%
The Outer Worlds 75% 85%

In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 7870 XT PowerColor Myst. Edition are very slightly better than the Nvidia GeForce GTX 660 MSI Hawk 2GB Edition.

The GTX 660 has a 160 MHz higher core clock speed than the HD 7870 XT, but the HD 7870 XT has 16 more Texture Mapping Units than the GTX 660. As a result, the HD 7870 XT exhibits a 2 GTexel/s better Texture Fill Rate than the GTX 660. 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 160 MHz higher core clock speed than the HD 7870 XT, but the HD 7870 XT has 8 more Render Output Units than the GTX 660. As a result, the HD 7870 XT exhibits a 3.6 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 HD 7870 XT was released less than a year after the GTX 660, 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 XT PowerColor Myst. Edition and the GeForce GTX 660 MSI Hawk 2GB 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 XT has 47.8 GB/sec greater memory bandwidth than the GTX 660, which means that the memory performance of the HD 7870 XT is noticeably better than the GTX 660.

The Radeon HD 7870 XT PowerColor Myst. Edition has 1536 Shader Processing Units and the GeForce GTX 660 MSI Hawk 2GB Edition has 960. However, the actual shader performance of the HD 7870 XT is 1273 and the actual shader performance of the GTX 660 is 1104. The HD 7870 XT having 169 better shader performance and an altogether better performance when taking into account other relevant data means that the HD 7870 XT delivers a noticeably smoother and more efficient experience when processing graphical data than the GTX 660.

The Radeon HD 7870 XT PowerColor Myst. Edition requires 185 Watts to run but there is no entry for the GeForce GTX 660 MSI Hawk 2GB Edition. We would recommend a PSU with at least 500 Watts for the HD 7870 XT.

GPU Architecture

Core Speed925 MHzvs1085 MHz
Boost Clock975 MHzvs1150 MHz
ArchitectureGCN 1.0 Tahiti LEKepler GK106-400-A1
OC Potential Fair vs Poor
Driver Support Good vs Good
Release Date22 Nov 2012vs01 Oct 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768 - green tick vs green tick -
1600x900
9.5
green tick vs
9.2
1920x1080
7.5
green tick vs
7.3
2560x1440
5.6
green tick vs
5.3
3840x2160
4
green tick vs
3.6

GPU Memory

Memory2048 MBvs2048 MB
Memory Speed1500 MHzvs1502 MHz
Memory Bus256 Bitvs192 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth192GB/secvs144.2GB/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 Units1536vs960
Actual Shader Performance61%vs53%
Technology28nmvs28nm
Texture Mapping Units96vs80
Texture Rate88.8 GTexel/svs86.8 GTexel/s
Render Output Units32vs24
Pixel Rate29.6 GPixel/svs26 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs0
DVI Connections1vs2
HDMI Connections1vs1
DisplayPort Connections0vs-
Comparison

GPU Power Requirements

Max Power185 Watts-
Recommended PSU500 Watts & 33 Amps-

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 XT PowerColor Myst. Edition is a special edition of Radeon HD 7870 XT (not to be confused with Radeon HD 7870). Refer to Radeon 7870 XT's page to know more about it.
This edition has, apparently, no new features - not even a new cooling system and so it performs exactly like the reference Radeon HD 7870 XT.
GeForce GTX 660 MSI Hawk 2GB Edition a special edition of GeForce GTX 660.
The new features include the Twin Frozr III Thermal Design cooling solution which, according to MSI, generates 20% more airflow than traditional fan design.
In terms of overclocking, the base-clock was increased from 980MHz to 1085MHz and the boost clock can now reach 1150MHz, instead of 1033MHz. The memory clock was left untouched.
The overclocking is therefore extreme and the performance boost is around 8% when compared to the standard GeForce GTX 660.
Recommended CPU
Possible GPU Upgrades
GPU Variants
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