Select any two GPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game GeForce GTX 660 Gainward 2GB Edition GeForce GTX 980 4GB SLI
Cyberpunk 2077 129% 31%
Watch Dogs Legion 122% 33%
Assassins Creed: Valhalla 111% 36%
Call of Duty: Black Ops Cold War 104% 38%
Genshin Impact 131% 30%
FIFA 21 16% 65%
Microsoft Flight Simulator 104% 38%
eFootball PES 2021 16% 65%
Ghostrunner 104% 38%
Horizon: Zero Dawn 118% 34%

In terms of overall gaming performance, the graphical capabilities of the Nvidia GeForce GTX 980 4GB SLI are massively better than the Nvidia GeForce GTX 660 Gainward 2GB Edition.

The GTX 980 has a 146 MHz higher core clock speed and 176 more Texture Mapping Units than the GTX 660. This results in the GTX 980 providing 209.9 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 980 has a 146 MHz higher core clock speed and 104 more Render Output Units than the GTX 660. This results in the GTX 980 providing 120.6 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 980 was released over a year more recently than the GTX 660, and so the GTX 980 is likely to have better driver support, meaning it will be more optimized for running the latest games when compared to the GTX 660.

The GTX 980 has 6144 MB more video memory than the GTX 660, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the GTX 980 also has superior memory performance overall.

The GTX 980 has 304.6 GB/sec greater memory bandwidth than the GTX 660, which means that the memory performance of the GTX 980 is massively better than the GTX 660.

The GeForce GTX 660 Gainward 2GB Edition has 960 Shader Processing Units and the GeForce GTX 980 4GB SLI has 4096. However, the actual shader performance of the GTX 660 is 991 and the actual shader performance of the GTX 980 is 6724. The GTX 980 having 5733 better shader performance and an altogether better performance when taking into account other relevant data means that the GTX 980 delivers a massively smoother and more efficient experience when processing graphical data than the GTX 660.

The GeForce GTX 660 Gainward 2GB Edition requires 140 Watts to run and the GeForce GTX 980 4GB SLI requires 350 Watts. We would recommend a PSU with at least 450 Watts for the GTX 660 and a PSU with at least 750 Watts for the GTX 980. The GTX 980 requires 210 Watts more than the GTX 660 to run. The difference is significant enough that the GTX 980 may have an adverse affect on your yearly electricity bills in comparison to the GTX 660.

Game FPS Benchmarks On Ultra

GPU Architecture

Core Speed980 MHzvs1126 MHz
Boost Clock1032 MHzvs1216 MHz
ArchitectureKepler GK106-400-A1Maxwell GM204-400-A1 (x2)
OC Potential Good vs Fair
Driver Support Good vs Great
Release Date06 Sep 2012vs19 Sep 2014
GPU LinkGD LinkGD Link
Approved
Comparison

Resolution Performance

1366x768
10
green tick vs -
1600x900
8.9
vs green tick
10
1920x1080
7
vs green tick
10
2560x1440
5.1
vs green tick
9.9
3840x2160
3.4
vs green tick
7.8

GPU Memory

Memory2048 MBvs8192 MB
Memory Speed1502 MHzvs1753 MHz
Memory Bus192 Bitvs512 Bit
Memory TypeGDDR5vsGDDR5
Memory Bandwidth144.2GB/secvs448.8GB/sec
L2 Cache 384 KB vs green tick 4096 KB
Delta Color Compression no vs yes
Memory Performance 0% green tick vs green tick 0%
Comparison

GPU Display

Shader Processing Units960vs4096
Actual Shader Performance48%vs100%
Technology28nmvs28nm
Texture Mapping Units80vs256
Texture Rate78.4 GTexel/svs288.3 GTexel/s
Render Output Units24vs128
Pixel Rate23.5 GPixel/svs144.1 GPixel/s
Comparison

GPU Outputs

Max Digital Resolution (WxH)4096x2160vs4096x2160
VGA Connections0vs0
DVI Connections2vs1
HDMI Connections1vs1
DisplayPort Connections1vs-
Comparison

GPU Power Requirements

Max Power140 Wattsvs350 Watts
Recommended PSU450 Watts & 30 Ampsvs750 Watts & 42 Amps

GPU Features

DirectX12.0vs12.1
Shader Model5.0vs5.0
Open GL4.5vs4.5
Open CL-vs-
Notebook GPUnono
SLI/Crossfireyesvsno
Dedicatedyesvsyes
Comparison

GPU Supporting Hardware

Recommended ProcessorIntel Core i5-3470 3.2GHzvsIntel Core i7-5820K 6-Core 3.3GHz
Recommended RAM8 GBvs16 GB
Maximum Recommended Gaming Resolution1920x1080vs5760x1080

Gaming Performance Value

Performance Value

GPU Mini Review

Mini ReviewOverview
GeForce GTX 660 Gainward 2GB Edition is a Special Edition of NVIDIA's Performance GeForce GTX 660 2GB, created by Gainward.

Overclock: Central Unit
None.

Overclock: Memory Clock
None.

Frame Buffer
Untouched.


Cooling Solution
Untouched.

Performance
Benchmarks Indicate no Performance Boost over the Reference GeForce GTX 660 2GB.
Overview
GeForce GTX 980 4GB SLI is a solution of two GeForce GTX 980 4GB put together using NVIDIA's SLI technology.

Architecture
The Second variant of the Maxwell Architecture, despite being also manufactured with a 28nm technology, has an extremely large L2 Cache and features a Third Generation Delta Color Compression which allows NVIDIA to produce Graphics Cards with relatively small memory data transfer rates, without causing too much impact on the overall performance. Furthermore, the Shaders have been redesigned and are both more powerful and energy efficient.

GPU
It consists of 2 GPUs codenamed GM204-400-A1 which, together, offer 4096 Shader Processing Units, 256 TMUs and 128 ROPs, on a 512-bit memory interface of fast GDDR5. The central unit runs at 1126MHz and goes up to 1216MHz, in Turbo Mode, while the memory clock operates at 1753MHz.

Power Consumption
Power Consumption lies between 300W and 400W.

Performance
Gaming benchmarks prove that at 4K (3840x2160) GeForce GTX 980 4GB SLI is over 7% faster than AMD's Radeon R9 295X2.

System Suggestions
We recommend a very strong processor (Intel Core i7 Six Core/AMD FX Eight Core) and 16GB of RAM for a system with GeForce GTX 980 4GB SLI.
Recommended CPU
Possible GPU Upgrades
-
GPU Variants
-
-