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Gaming Performance Comparison

Recommended System Requirements
Game Radeon HD 7870 GeForce GTX 660

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

The Radeon HD 7870 has a 20 MHz higher core clock speed and the same number of Texture Mapping Units as the GeForce GTX 660. This results in the Radeon HD 7870 providing 1.6 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 Radeon HD 7870 has a 20 MHz higher core clock speed and 8 more Render Output Units than the GeForce GTX 660. This results in the Radeon 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 GeForce GTX 660 was released less than a year after the Radeon HD 7870, and so they are likely to have similar driver support for optimizing performance when running the latest games.

The Radeon HD 7870 and the GeForce GTX 660 have the same amount of video memory, but are likely to provide slightly different experiences when displaying game textures at high resolutions.

The Radeon HD 7870 has 9.4 GB/sec greater memory bandwidth than the GeForce GTX 660, which means that the memory performance of the Radeon HD 7870 is marginally better than the GeForce GTX 660.

The Radeon HD 7870 has 1280 Shader Processing Units and the GeForce GTX 660 has 960. However, the actual shader performance of the Radeon HD 7870 is 1088 and the actual shader performance of the GeForce GTX 660 is 992. The Radeon HD 7870 having 96 better shader performance and an altogether better performance when taking into account other relevant data means that the Radeon HD 7870 delivers a slightly smoother and more efficient experience when processing graphical data than the GeForce GTX 660.

The Radeon HD 7870 requires 175 Watts to run and the GeForce GTX 660 requires 140 Watts. We would recommend a PSU with at least 500 Watts for the Radeon HD 7870 and a PSU with at least 450 Watts for the GeForce GTX 660. The Radeon HD 7870 requires 35 Watts more than the GeForce GTX 660 to run. The difference is significant enough that the Radeon HD 7870 may have a slight adverse affect on your yearly electricity bills in comparison to the GeForce GTX 660.

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GPU Architecture

Core Speed1000 MHzvs980 MHz
Boost Clock-vs1033 MHz
ArchitectureGCN 1.0 Pitcairn XTKepler GK106-400-A1
OC Potential Fair vs Good
Driver Support Good vs Good
Release Date05 Mar 2012vs13 Sep 2012
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
10
green tick vs green tick
10
1600x900
9.2
green tick vs
8.9
1920x1080
7.2
green tick vs
7
2560x1440
5.4
green tick vs
5.1
3840x2160
3.7
green tick vs
3.4

GPU Memory

Memory2048 MBvs2048 MB
Memory Speed1200 MHzvs1502 MHz
Memory Bus256 Bitvs192 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth153.6GB/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 Units1280vs960
Actual Shader Performance52%vs48%
Technology28nmvs28nm
Texture Mapping Units80vs80
Texture Rate80 GTexel/svs78.4 GTexel/s
Render Output Units32vs24
Pixel Rate32 GPixel/svs23.5 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs0
DVI Connections1vs2
HDMI Connections1vs1
DisplayPort Connections-vs0
Comparison

GPU Power Requirements

Max Power175 Wattsvs140 Watts
Recommended PSU500 Watts & 33 Ampsvs450 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 ReviewOverview
Radeon HD 7870 is a Performance Graphics Card based on the First Revision of the Graphics Core Next (GCN) Architecture.

Architecture
The GCN Architecture succeeds the 40nm Terascale Architecture. In addition to being produced with a 28nm Technology, the GCN Architecture adds other Technologies that allow for energy efficiency. For example, ZeroCore Power, a long idle power saving technology, allows the Graphics Cards to shut down by itself when the Monitor is turned off.
GCN also adds Improved Anisotropic Filtering, DirectX 11 Tessellation and the Partially Resident Textures (PRT) Technology, which enables future games to utilize ultra-high resolution textures with the same performance as today's small and often repetitive textures.

GPU
It equips a GPU Codenamed Pitcairn XT which has 20 Compute Units activated and thus offers 1280 Shader Processing Units, 80 TMUs and 32 ROPs. The Central Unit is clocked at 1000MHz.

Memory
The GPU accesses a 2GB frame buffer of fast GDDR5, through a 256-bit memory interface. The size of the frame buffer is adequate. The Memory Clock Operates at 1200MHz.

Power Consumption
With a rated board TDP of 175W, it requires at least a 500W PSU with two available 6-pin connectors.

Performance
Radeon HD 7870 competes with GeForce GTX 660 Ti but its performance was only slightly above the lower positioned GeForce GTX 660 and so GeForce GTX 660 Ti was considerably faster.

System Suggestions
Radeon HD 7870 is best suited for resolutions up to and including 1920x1080. We recommend a Strong Processor (Intel Core i5 Quad Core/AMD FX Six Core) and 8GB of RAM for Optimal Performance.
Overview
GeForce GTX 660 is a Performance Graphics Card based on the Kepler Architecture.

Architecture
The Kepler Architecture was NVIDIA's big step to power efficiency. Each Stream Multiprocessor (SMX) now hosts 192 Shader Processing Units - against the 48 of older Fermi Architecture, and has been redesigned being now clocked at the same speed of the Central Unit. This means they are more energy efficient and will consequently lead to cooler operating temperatures. However, it also means they are weaker. It can be said that one Fermi SMX is as fast as 2 Kepler SMXs.
Additionally, and not available in all GPUs, Kepler also introduced the Boost Clock Feature. The Boost Clock is an even higher Clock Speed activated when in gaming mode and becomes the effective speed of the GPU. GPU
It equips a GPU GK106-400-A1 which has 5 Stream Multiprocessors activated and thus offers 960 Shader Processing Units, 80 TMUs and 24 ROPs. The Central Unit is initially clocked at 980MHz and goes up to 1033MHz, in Turbo Mode.

Memory
The GPU accesses a 2GB frame buffer of fast GDDR5, through a 192-bit memory interface. The size of the frame buffer is adequate. The Memory Clock Operates at 1502MHz.

Power Consumption
With a rated board TDP of 140W, it requires at least a 450W PSU with one available 6-pin connector.

Performance
GeForce GTX 660 competes with Radeon HD 7850.
At 1920x1080, the best suited resolution for GeForce GTX 660, benchmarks indicate its performance is a little over the older GeForce GTX 570 and quite superior to Radeon HD 7850.

System Suggestions
GeForce GTX 660 is best suited for resolutions up to and including 1920x1080. We recommend a Strong Processor and 8GB of RAM for Optimal Performance.
Recommended CPUIntel Core i3-4350T 3.1GHz
AMD Athlon II X4 638
AMD Athlon II X4 635
AMD Opteron 6134
AMD APU A6-3670K Quad-Core
Intel Core i5-4460 3.2GHz
Intel Core i5-4570S 2.9GHz
Intel Xeon E3-1220 v2
Intel Xeon Processor X5675
Intel Core i5-7400 3.0GHz
Possible GPU UpgradesRadeon R9 390 Sapphire Nitro w/ Back Plate 8GB Edition
Radeon R9 390 Asus DirectCU III OC Strix Gaming 8GB Edition
Radeon R9 290X PowerColor PCS+ 4GB Edition
Radeon R9 290X Asus ROG Matrix Platinum Edition
Radeon R9 290X Asus DirectCU II OC Edition
GeForce GTX 660 Twin Frozr OC Edition SLI
GeForce GTX 780
Radeon HD 7970 GHz MSI Lightning BE 3GB Edition
Quadro M4000
GeForce GTX 950 2GB SLI
GPU VariantsRadeon HD 7870 Club3D royalQueen 2GB Edition
Radeon HD 7870 Sapphire GHz 2GB Edition
Radeon HD 7870 DirectCU II 2GB Edition
Radeon HD 7870 PowerColor OC Edition
Radeon HD 7870 Twin Frozr III OC 2GB Edition
Radeon HD 7870 MSI OC Edition
Radeon HD 7870 HIS IceQ Edition
Radeon HD 7870 Club3D GHz Edition
Radeon HD 7870 Double D Edition
Radeon HD 7870 XFX Core Edition
Radeon HD 7870 Club3D jokerCard 2GB Edition
Radeon HD 7870 Sapphire GHz OC Edition
Radeon HD 7870 Double D Black Edition
Radeon HD 7870 Gigabyte OC Edition
Radeon HD 7870 MSI Hawk Edition
Radeon HD 7870 HIS IceQ Turbo Edition
Radeon HD 7870 DirectCU II TOP v2 Edition
Radeon HD 7870 HIS IceQ X Turbo Edition
Radeon HD 7870 PowerColor Devil Edition
Radeon HD 7870 PowerColor PCS+ 2GB Edition
Radeon HD 7870 PCS+ Vortex II Edition
GeForce GTX 660 Direct CU II Edition
GeForce GTX 660 Twin Frozr Edition
GeForce GTX 660 Inno3D Edition
GeForce GTX 660 Gainward 2GB Edition
GeForce GTX 660 Palit 2GB Edition
GeForce GTX 660 Zotac Edition
GeForce GTX 660 EVGA OC 2GB Edition
GeForce GTX 660 Zotac Synergy Edition
GeForce GTX 660 Galaxy GC Edition
GeForce GTX 660 DA OC 2GB Edition
GeForce GTX 660 Golden Sample Edition
GeForce GTX 660 Direct CU II OC Edition
GeForce GTX 660 Twin Frozr OC Edition
GeForce GTX 660 Gigabyte OC Edition
GeForce GTX 660 MSI OC 2GB Edition
GeForce GTX 660 Palit OC 2GB Edition
GeForce GTX 660 Gigabyte OC 3GB Edition
GeForce GTX 660 Zotac AMP Edition
GeForce GTX 660 WindForce 2X OC Edition
GeForce GTX 660 MSI Gaming 2GB Edition
GeForce GTX 660 EVGA Superclocked Edition
GeForce GTX 660 EVGA SC Signature 2 Edition
GeForce GTX 660 Direct CU II Top Edition
GeForce GTX 660 MSI Hawk 2GB Edition
GeForce GTX 660 EVGA FTW Signature 2 Edition
GeForce GTX 660 EVGA FTW Signature 2 3GB Edition
GeForce GTX 660 Twin Frozr OC Edition SLI